United States · Santa Clara Completed: Apr 22, 2026 01:09 UTCMobile 375 × 812
Desktop 1440 × 900
Score: 71 / 100
Based on 8 categories, 0 sections
Room to improve — your 46.0s load time is above Google's 2.5s 'Good' threshold.
Several missing protections leave your users and data exposed.
Several issues make your site difficult for assistive technology users.
Well-optimized for search — your content is discoverable.
Good server performance with room for optimization.
Mostly compliant — a few items need attention.
Good content signals with minor gaps.
Heavier than average — reducing page weight saves energy and bandwidth.
The overall score is a weighted average of individual category scores. Categories with more impact on user experience and security carry more weight.
Weights reflect general web best practices. Individual needs may differ.
Content-Security-Policy header is missing
Security gaps expose your site and users to attacks, eroding trust.
No Content-Security-Policy header found
Security gaps expose your site and users to attacks, eroding trust.
Page weighs 18.2 MB (10.6 MB transferred)
Performance issues directly impact user engagement and conversion rates.
1 link(s) with no accessible text
Accessibility issues exclude users with disabilities — up to 15% of your potential audience.
2 control(s) without accessible label
Accessibility issues exclude users with disabilities — up to 15% of your potential audience.
High impact, low effort — start here.
High impact, requires investment.
Small gains, minimal effort.
Nothing in this quadrant — good news.
Low impact, high effort — do last.
Nothing in this quadrant — good news.
[](https://beavercheck.com/results/46268968-884e-4b8e-b48b-eeea5ace3871)<a href="https://beavercheck.com/results/46268968-884e-4b8e-b48b-eeea5ace3871"><img src="https://beavercheck.com/badge?url=https%3A%2F%2Fsparkfun.com" alt="BeaverCheck Score"></a>https://beavercheck.com/badge?url=https%3A%2F%2Fsparkfun.comThis badge auto-updates with your latest scan result.
Your site performs reasonably well, but a few targeted fixes could meaningfully improve results. Your LCP of 46.0s exceeds Google's 2.5s 'Good' threshold and the 1 performance issue below directly contributes to it. Accessibility issues exclude users who rely on assistive technology — an estimated 15% of your potential audience. Addressing the critical issues below would have the most immediate impact on your user trust.
8 barrier(s) likely increasing bounce by ~30%.
Page takes 46.0s to load
+12% bounceUsers abandon at ~3s — you're 43.5s over the 2.5s threshold
Fix: Optimize render-blocking resources, preload the hero image, and compress images
Page feels frozen for 1.6s
+5% bounceClicks on the primary CTA are ignored while JavaScript runs
Fix: Break up long tasks; defer non-critical JavaScript to post-hydration
No HSTS header
+1% bounceReturning visitors are briefly exposed to downgrade attacks on first request
Fix: Set Strict-Transport-Security: max-age=31536000; includeSubDomains
No Content-Security-Policy header
+1% bounceHigher XSS blast radius — one compromised script can exfiltrate the checkout form
Fix: Ship a reporting-only CSP first, then enforce once violations are clean
2 form field(s) without a label
+4% bounceScreen readers skip unlabeled fields; autofill can't identify them; checkout abandonment spikes
Fix: Associate every input with a visible <label for="…">; add autocomplete attributes
No Open Graph tags
+2% bounceLinks shared on LinkedIn / Slack / Facebook show bare URLs — referral clicks drop
Fix: Add og:title, og:description, og:image, og:url to the page head
6 link(s) with generic text ("click here", "read more")
+1% bounceScreen-reader users navigating by link list see no context — and search engines can't infer relevance
Fix: Rewrite with descriptive phrases that identify the destination
1 broken link(s) on the page
+2% bounceClicks land on 404s — trust drops and the session often ends
Fix: Fix or remove the broken destinations surfaced on the Content tab
Preliminary CRO audit — each barrier links to the tab with detailed analysis.
€510 investment → €2.46/month returns + EUR 120,500,000 risk avoided
€510
6h · 5 findings
€2.46 /mo
~€30 / year
EUR 120,500,000
if kept compliant
€85 — in quick wins — start here for the fastest payback
Figures combine localized regulatory fine ceilings, search/conversion value priced against local CPC, and bandwidth waste estimates. Results depend on implementation quality and audience composition. Not legal or financial advice.
6.0 developer hours at €85/hr
Based on European Union rates (€85/hr)
Start here for the best return on investment
€10,041,669 / month at risk
~€120,500,030 / year if left unfixed
€120,500,000
+8 more
€2.46 /mo
33196.0 MB/mo × 0.074 EUR/GB
Compliance figures represent the statutory maximum fine for the most severe triggered category, capped per regulation — not the sum of per-finding penalties. Based on published regulatory fine ranges. This is not legal advice.
Unique monthly visitors from your analytics
Purchases, signups, or key actions
Optional — for revenue estimation
more engaged visitors from reduced bounce
Fix 5 critical issues to capture this value
Based on Google/Deloitte research ("Milliseconds Make Millions") showing a ~7% bounce rate increase per additional second of LCP above the 2.5s "Good" threshold.
Your site's LCP: → estimated after fixes.
These are estimates based on industry research — actual results vary
Your data stays in your browser — nothing is sent to our servers
Thanks for your feedback!
We'll use a cached audit if available, or offer to scan.
Industry-standard audits powered by Google Lighthouse.
Key metrics that affect user experience.
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
5.55 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
45.97 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
1.63 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.000
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
16.27 s
Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.
53.64 s
Audit breakdown by category with detailed findings.
Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.
Performance issues directly impact user engagement and conversion rates.
Polyfills and transforms enable older browsers to use new JavaScript features. However, many aren't necessary for modern browsers. Consider modifying your JavaScript build process to not transpile Baseline features, unless you know you must support older browsers. Learn why most sites can deploy ES6+ code without transpiling
Shipping ES5 transpiled code to modern browsers wastes bytes — every user with an evergreen browser pays for compatibility you don't need.
Most users today run browsers that natively support ES6+, async/await, optional chaining, and the rest of modern JavaScript. Transpiling to ES5 'just in case' adds 20-40% to your bundle for no benefit. Configure your build to target a modern browserslist, or ship a differential bundle pair (modern + legacy) with the module/nomodule pattern.
Source: Google web.dev / Lighthouse
3rd party code can significantly impact load performance. Reduce and defer loading of 3rd party code to prioritize your page's content.
Performance issues directly impact user engagement and conversion rates.
A long cache lifetime can speed up repeat visits to your page. Learn more about caching.
Performance issues directly impact user engagement and conversion rates.
| Request | Cache TTL | Transfer Size |
|---|---|---|
| js.hsforms.net/forms/embed/v2.js | 300.0 s | 193.7 KiB |
| i.ytimg.com/vi/Q4csFhDtCt4/hqdefault.jpg | 7200.0 s | 44.9 KiB |
| livesearch-autocomplete.magento-ds.com/v1/LiveSearchAutocomplete.js | 0.0 ms | 32.2 KiB |
| i.ytimg.com/vi/sqTIUvmcUvY/hqdefault.jpg | 7200.0 s | 39.8 KiB |
| i.ytimg.com/vi/hm-n1yeiu6M/hqdefault.jpg | 7200.0 s | 35.8 KiB |
| livesearch-metrics.magento-ds.com/v0/liveSearchMetrics.js | 0.0 ms | 19.1 KiB |
| js.braintreegateway.com/web/3.112.0/js/paypal-checkout.min.js | 3600.0 s | 16.5 KiB |
| js.braintreegateway.com/web/3.112.0/js/client.min.js | 3600.0 s | 12.8 KiB |
| magento-recs-sdk.adobe.net/v2/index.js | 0.0 ms | 9.7 KiB |
| i.ytimg.com/vi/sXuw1smWxhQ/hqdefault.jpg | 7200.0 s | 12.0 KiB |
| commerce.adobedtm.com/v6/ds.min.js | 0.0 ms | 8.0 KiB |
| widget.trustpilot.com/bootstrap/v5/tp.widget.bootstrap.min.js | 86400.0 s | 8.1 KiB |
| rum.hlx.page/.rum/@adobe/helix-rum-js@%5E2/dist/rum-standalone.js | 3600.0 s | 2.8 KiB |
| invitejs.trustpilot.com/tp.min.js | 86400.0 s | 4.0 KiB |
| commerce.adobedtm.com/recommendations/events/v1/recommendationsEvents.min.js | 0.0 ms | 1.3 KiB |
A forced reflow occurs when JavaScript queries geometric properties (such as offsetWidth) after styles have been invalidated by a change to the DOM state. This can result in poor performance. Learn more about forced reflows and possible mitigations.
Performance issues directly impact user engagement and conversion rates.
Reducing the download time of images can improve the perceived load time of the page and LCP. Learn more about optimizing image size
Performance issues directly impact user engagement and conversion rates.
| URL | Resource Size | Est Savings | |
|---|---|---|---|
Upgrade Your RTK GNSS Board with Tilt Compensation div.sparkfun-blog-item > figure > a > img | cdn.sparkfun.com/c/500-282/assets/home_page_posts/1/6/2/4/5/tilt-comp-line.png | 149.3 KiB | 136.0 KiB |
Mic Price Check div.sparkfun-blog-item > figure > a > img | cdn.sparkfun.com/c/500-282/assets/home_page_posts/1/6/3/4/4/SoundThumb.png | 129.5 KiB | 116.2 KiB |
New
Product
BlueSMiRF v2 - JST
A wireless serial bridge made for Bluetooth-enab… div > div.content-col-md-5 > a > div.pagebuilder-slide-wrapper | /media/.renditions/wysiwyg/homepage/FeaturedContent/Secon... | 141.2 KiB | 114.4 KiB |
A hand interacting with buttons on a breadboard div.pagebuilder-column > figure > a > img.pagebuilder-mobile-only | /media/.renditions/wysiwyg/homepage/categories/kits.jpg?f... | 118.7 KiB | 104.5 KiB |
New
Product
Thing Plus - ESP32-C5
The latest ESP32 board for wireless applicati… div > div.content-col-md-5 > a > div.pagebuilder-slide-wrapper | /media/.renditions/wysiwyg/homepage/FeaturedContent/Large... | 116.4 KiB | 89.6 KiB |
Breadboard Power Supply Kit 5V/3.3V Quickstart Guide li.sparkfun-resources-item > figure > a.light-contrast > img | /c/500-282/assets/learn_tutorials/3/8/3/7/Breadboard_powe... | 86.5 KiB | 83.5 KiB |
Use Galileo's Free High Accuracy Service With The TX2 div.sparkfun-blog-item > figure > a > img | /c/500-282/assets/home_page_posts/1/6/3/1/2/Galileo-HAS-E... | 84.9 KiB | 71.6 KiB |
New
Product
9DoF IMU Breakout - IM19
A motion tracking breakout that brings tog… div > div.content-col-md-5 > a > div.pagebuilder-slide-wrapper | /media/.renditions/wysiwyg/homepage/FeaturedContent/Secon... | 90.0 KiB | 63.1 KiB |
Build Your Own High-Concentration CO2 Detector li.sparkfun-resources-item > figure > a.light-contrast > img | cdn.sparkfun.com/c/500-282/assets/learn_tutorials/3/9/6/9/Co2SensingCarThumb.png | 64.4 KiB | 61.5 KiB |
Qwiic & Easy DIY Ambient Light Indicator li.sparkfun-resources-item > figure > a.light-contrast > img | /c/500-282/assets/learn_tutorials/3/8/7/0/Ambient-Light-S... | 56.1 KiB | 53.1 KiB |
What's the difference between the ZED-F9P and the ZED-X20P? li.sparkfun-resources-item > figure > a.light-contrast > img | /c/500-282/assets/learn_tutorials/4/0/6/8/zed-x20p-vs-zed... | 50.3 KiB | 47.3 KiB |
The SparkFun RTK Facet in its black carrying case with accessories on a white b… a > span.product-image-container > span.product-image-wrapper > img.product-image-photo | /media/catalog/product/cache/df4360b598d6f0c75fa659693b37... | 34.0 KiB | 29.5 KiB |
The SparkFun 9DoF IMU Breakout - IM19 diagonally from the top. a > span.product-image-container > span.product-image-wrapper > img.product-image-photo | /media/catalog/product/cache/df4360b598d6f0c75fa659693b37... | 33.9 KiB | 29.5 KiB |
The History of BlueSMiRF div.sparkfun-blog-item > figure > a > img | /c/500-282/assets/home_page_posts/1/6/2/7/8/example-mate-... | 42.0 KiB | 28.8 KiB |
Hello World! displayed on an LCD div.pagebuilder-column > figure > a > img.pagebuilder-mobile-only | /media/.renditions/wysiwyg/homepage/categories/DisplayOLE... | 36.2 KiB | 22.1 KiB |
A weather meter being hooked up div.pagebuilder-column > figure > a > img.pagebuilder-mobile-only | /media/.renditions/wysiwyg/homepage/categories/Environmen... | 25.3 KiB | 11.9 KiB |
SparkFun GPS Dead Reckoning Breakout - NEO-M8U (Qwiic) a > span.product-image-container > span.product-image-wrapper > img.product-image-photo | /media/catalog/product/cache/df4360b598d6f0c75fa659693b37... | 11.2 KiB | 6.7 KiB |
Raspberry Pi 5 - 16GB a > span.product-image-container > span.product-image-wrapper > img.product-image-photo | /media/catalog/product/cache/df4360b598d6f0c75fa659693b37... | 10.8 KiB | 6.4 KiB |
SparkPNT FPX a > span.product-image-container > span.product-image-wrapper > img.product-image-photo | /media/catalog/product/cache/df4360b598d6f0c75fa659693b37... | 10.8 KiB | 6.3 KiB |
SparkPNT FPM-T a > span.product-image-container > span.product-image-wrapper > img.product-image-photo | /media/catalog/product/cache/df4360b598d6f0c75fa659693b37... | 10.6 KiB | 6.1 KiB |
SparkPNT FPM a > span.product-image-container > span.product-image-wrapper > img.product-image-photo | /media/catalog/product/cache/df4360b598d6f0c75fa659693b37... | 10.2 KiB | 5.7 KiB |
Feature image of the Teensy 4.0 on a white background. a > span.product-image-container > span.product-image-wrapper > img.product-image-photo | /media/catalog/product/cache/df4360b598d6f0c75fa659693b37... | 10.2 KiB | 5.7 KiB |
A person swiping his RFID card div.pagebuilder-column > figure > a > img.pagebuilder-mobile-only | /media/.renditions/wysiwyg/homepage/categories/rfid-featu... | 11.0 KiB | 5.2 KiB |
The SparkFun Qwiic Relay - 1x1A DPDT from a top angle. a > span.product-image-container > span.product-image-wrapper > img.product-image-photo | /media/catalog/product/cache/df4360b598d6f0c75fa659693b37... | 9.1 KiB | 5.1 KiB |
SparkPNT FPL a > span.product-image-container > span.product-image-wrapper > img.product-image-photo | /media/catalog/product/cache/df4360b598d6f0c75fa659693b37... | 8.7 KiB | 4.9 KiB |
The SparkFun Thing Plus - ESP32-C5 diagonally from the top. a > span.product-image-container > span.product-image-wrapper > img.product-image-photo | /media/catalog/product/cache/df4360b598d6f0c75fa659693b37... | 8.7 KiB | 4.9 KiB |
A signal illustration symbolizing distance sensing div.row-full-width-inner > figure > a > img.pagebuilder-mobile-only | /media/wysiwyg/homepage/electronic-topics/distance-sensin... | 8.0 KiB | 4.5 KiB |
Front facing product photo of the NVIDIA Jetson Orin™ Nano Super Developer Kit … a > span.product-image-container > span.product-image-wrapper > img.product-image-photo | /media/catalog/product/cache/df4360b598d6f0c75fa659693b37... | 8.1 KiB | 4.5 KiB |
NVIDIA Jetson AGX Orin 64GB Developer Kit on a white background. a > span.product-image-container > span.product-image-wrapper > img.product-image-photo | /media/catalog/product/cache/df4360b598d6f0c75fa659693b37... | 8.0 KiB | 4.5 KiB |
A satellite illustration symbolizing GPS system div.row-full-width-inner > figure > a > img.pagebuilder-mobile-only | /media/wysiwyg/homepage/electronic-topics/gps_gnss.jpg?fo... | 7.7 KiB | 4.2 KiB |
Featured image of the Teensy 4.1 without Ethernet on a white background. a > span.product-image-container > span.product-image-wrapper > img.product-image-photo | /media/catalog/product/cache/df4360b598d6f0c75fa659693b37... | 7.5 KiB | 4.2 KiB |
Feature image of the Teensy 4.1 board on a white background. a > span.product-image-container > span.product-image-wrapper > img.product-image-photo | /media/catalog/product/cache/df4360b598d6f0c75fa659693b37... | 7.4 KiB | 4.2 KiB |
The RockBLOCK 9603N - Iridium SatComm Module next to it's hookup cable. a > span.product-image-container > span.product-image-wrapper > img.product-image-photo | /media/catalog/product/cache/df4360b598d6f0c75fa659693b37... | 7.3 KiB | 4.1 KiB |
Optimize LCP by making the LCP image discoverable from the HTML immediately, and avoiding lazy-loading
Performance issues directly impact user engagement and conversion rates.
Avoid chaining critical requests by reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.
Performance issues directly impact user engagement and conversion rates.
Requests are blocking the page's initial render, which may delay LCP. Deferring or inlining can move these network requests out of the critical path.
Performance issues directly impact user engagement and conversion rates.
Your first network request is the most important. Reduce its latency by avoiding redirects, ensuring a fast server response, and enabling text compression.
Performance issues directly impact user engagement and conversion rates.
HTTP/2 and HTTP/3 offer many benefits over HTTP/1.1, such as multiplexing. Learn more about using modern HTTP.
Performance issues directly impact user engagement and conversion rates.
These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.
Time to Interactive is the amount of time it takes for the page to become fully interactive. Learn more about the Time to Interactive metric.
Performance issues directly impact user engagement and conversion rates.
Redirects introduce additional delays before the page can be loaded. Learn how to avoid page redirects.
Performance issues directly impact user engagement and conversion rates.
| URL | Time Spent |
|---|---|
| sparkfun.com/ | 753 ms |
| www.sparkfun.com/ | 0.0 ms |
The maximum potential First Input Delay that your users could experience is the duration of the longest task. Learn more about the Maximum Potential First Input Delay metric.
Performance issues directly impact user engagement and conversion rates.
Minifying JavaScript files can reduce payload sizes and script parse time. Learn how to minify JavaScript.
Performance issues directly impact user engagement and conversion rates.
Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity. Learn how to reduce unused CSS.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Est Savings |
|---|---|---|
| /static/version1775629953/frontend/SparkFun/default/defau... | 89.4 KiB | 79.6 KiB |
| /static/version1775629953/frontend/SparkFun/default/defau... | 25.5 KiB | 25.5 KiB |
Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity. Learn how to reduce unused JavaScript.
Multi-megabyte JavaScript bundles delay every interactive feature on the page.
This is the Lighthouse audit fired when too much JS is shipped relative to what executes. The fix isn't a config flag — it requires bundle analysis (webpack-bundle-analyzer, rollup-plugin-visualizer), splitting routes into chunks, lazy-loading off-screen components, and removing unused dependencies. Fundamentally different from minification: minifying reduces byte count, this reduces what's downloaded at all.
Source: Google web.dev / Lighthouse
| URL | Transfer Size | Est Savings |
|---|---|---|
| www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 361.8 KiB | 177.0 KiB |
| js.hsforms.net/forms/embed/v2.js | 186.4 KiB | 74.6 KiB |
| unpkg.com/@adobe/magento-storefront-event-collector@%5E1/dist/index.js | 44.9 KiB | 31.5 KiB |
| /static/version1775629953/base/Magento/base/default/knock... | 68.9 KiB | 24.9 KiB |
| www.sparkfun.com/static/version1775629953/base/Magento/base/default/jquery.js | 81.8 KiB | 23.0 KiB |
Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to reduce Javascript execution time.
Performance issues directly impact user engagement and conversion rates.
Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to minimize main-thread work
Performance issues directly impact user engagement and conversion rates.
| Category | Time Spent |
|---|---|
| Script Evaluation | 9.6 s |
| Other | 3.8 s |
| Style & Layout | 1.9 s |
| Script Parsing & Compilation | 875 ms |
| Parse HTML & CSS | 569 ms |
| Rendering | 222 ms |
| Garbage Collection | 166 ms |
Many navigations are performed by going back to a previous page, or forwards again. The back/forward cache (bfcache) can speed up these return navigations. Learn more about the bfcache
Performance issues directly impact user engagement and conversion rates.
| Failure reason | Failure type |
|---|---|
| Pages with cache-control:no-store header cannot enter back/forward cache. | Actionable |
| Pages whose main resource has cache-control:no-store cannot enter back/forward cache. | Not actionable |
| Back/forward cache is disabled because some JavaScript network request received resource with Cache-Control: no-store header. | Not actionable |
Large network payloads cost users real money and are highly correlated with long load times. Learn how to reduce payload sizes.
Performance issues directly impact user engagement and conversion rates.
Set an explicit width and height on image elements to reduce layout shifts and improve CLS. Learn how to set image dimensions
Performance issues directly impact user engagement and conversion rates.
| URL | |
|---|---|
A hand interacting with buttons on a breadboard div.pagebuilder-column > figure > a > img.pagebuilder-mobile-only | /media/.renditions/wysiwyg/homepage/categories/kits.jpg?f... |
A weather meter being hooked up div.pagebuilder-column > figure > a > img.pagebuilder-mobile-only | /media/.renditions/wysiwyg/homepage/categories/Environmen... |
Hello World! displayed on an LCD div.pagebuilder-column > figure > a > img.pagebuilder-mobile-only | /media/.renditions/wysiwyg/homepage/categories/DisplayOLE... |
A person swiping his RFID card div.pagebuilder-column > figure > a > img.pagebuilder-mobile-only | /media/.renditions/wysiwyg/homepage/categories/rfid-featu... |
Mic Price Check div.sparkfun-blog-item > figure > a > img | cdn.sparkfun.com/c/500-282/assets/home_page_posts/1/6/3/4/4/SoundThumb.png |
Use Galileo's Free High Accuracy Service With The TX2 div.sparkfun-blog-item > figure > a > img | /c/500-282/assets/home_page_posts/1/6/3/1/2/Galileo-HAS-E... |
The History of BlueSMiRF div.sparkfun-blog-item > figure > a > img | /c/500-282/assets/home_page_posts/1/6/2/7/8/example-mate-... |
Upgrade Your RTK GNSS Board with Tilt Compensation div.sparkfun-blog-item > figure > a > img | cdn.sparkfun.com/c/500-282/assets/home_page_posts/1/6/2/4/5/tilt-comp-line.png |
What's the difference between the ZED-F9P and the ZED-X20P? li.sparkfun-resources-item > figure > a.light-contrast > img | /c/500-282/assets/learn_tutorials/4/0/6/8/zed-x20p-vs-zed... |
Qwiic & Easy DIY Ambient Light Indicator li.sparkfun-resources-item > figure > a.light-contrast > img | /c/500-282/assets/learn_tutorials/3/8/7/0/Ambient-Light-S... |
Build Your Own High-Concentration CO2 Detector li.sparkfun-resources-item > figure > a.light-contrast > img | cdn.sparkfun.com/c/500-282/assets/learn_tutorials/3/9/6/9/Co2SensingCarThumb.png |
Breadboard Power Supply Kit 5V/3.3V Quickstart Guide li.sparkfun-resources-item > figure > a.light-contrast > img | /c/500-282/assets/learn_tutorials/3/8/3/7/Breadboard_powe... |
ublox logo div.pagebuilder-column > figure > a > img.pagebuilder-mobile-only | /media/.renditions/wysiwyg/homepage/brands/400pxubloxlogo... |
Sensirion logo div.pagebuilder-column > figure > a > img.pagebuilder-mobile-only | /media/.renditions/wysiwyg/homepage/brands/400pxsensirion... |
A wifi symbol illustration div.row-full-width-inner > figure > a > img.pagebuilder-mobile-only | www.sparkfun.com/media/wysiwyg/homepage/electronic-topics/wifi.jpg?format=webply |
A signal illustration symbolizing distance sensing div.row-full-width-inner > figure > a > img.pagebuilder-mobile-only | /media/wysiwyg/homepage/electronic-topics/distance-sensin... |
A soldering iron symbolizing engineering essentials div.row-full-width-inner > figure > a > img.pagebuilder-mobile-only | /media/wysiwyg/homepage/electronic-topics/engineering-ess... |
A satellite illustration symbolizing GPS system div.row-full-width-inner > figure > a > img.pagebuilder-mobile-only | /media/wysiwyg/homepage/electronic-topics/gps_gnss.jpg?fo... |
More information about the performance of your application. These numbers don't directly affect the Performance score.
These checks highlight opportunities to improve the accessibility of your web app. Automatic detection can only detect a subset of issues and does not guarantee the accessibility of your web app, so manual testing is also encouraged.
Properly ordered headings that do not skip levels convey the semantic structure of the page, making it easier to navigate and understand when using assistive technologies. Learn more about heading order.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
New Releases div.pagebuilder-column-line > div.pagebuilder-column > div > h5 |
Best Sellers div.pagebuilder-column-line > div.pagebuilder-column > div > h5 |
These are opportunities to improve keyboard navigation in your application.
Screen readers have a specific way of announcing lists. Ensuring proper list structure aids screen reader output. Learn more about proper list structure.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
comparison body#html-body > ul.compare |
Featured
GPS / GNSS
Sensors
Development Boards
IoT & Wireless
Components
Kits
A… div.section-items > div#store.menu > nav.navigation > ul#ui-id-1 |
Item div.tabs-content > div#OSKY766 > div > ul#sparkfun-resources-feed-1169589433 |
Screen readers require list items (`<li>`) to be contained within a parent `<ul>`, `<ol>` or `<menu>` to be announced properly. Learn more about proper list structure.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
Add to Cart
SparkFun 9DoF IMU Breakout - IM19
$199.95 div.slick-track > div#slick-slide10 > div > li.product-item |
Add to Cart
SEGGER J-Link EDU Mini (with USB-C Cable)
$89.95 div.slick-track > div#slick-slide11 > div > li.product-item |
Add to Cart
LIDAR-Lite v3
$149.99 div.slick-track > div#slick-slide20 > div > li.product-item |
Add to Cart
Teensy 4.1
$31.50 div.slick-track > div#slick-slide21 > div > li.product-item |
These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.
Image display dimensions should match natural aspect ratio. Learn more about image aspect ratio.
Performance issues directly impact user engagement and conversion rates.
| URL | Aspect Ratio (Displayed) | Aspect Ratio (Actual) | |
|---|---|---|---|
DataLogger IoT div.pagebuilder-collage-content > div > h3 > img#LMF0SQ8 | /media/.renditions/wysiwyg/Logos/Ecosystems/datalogger-io... | 220 x 62 (3.55) | 330 x 79 (4.18) |
Artemis Logo div.pagebuilder-collage-content > div > h3 > img#QUOHQJ8 | www.sparkfun.com/media/wysiwyg/homepage/artemis-logo-homepage.png | 182 x 36 (5.06) | 165 x 38 (4.34) |
Issues logged to the `Issues` panel in Chrome Devtools indicate unresolved problems. They can come from network request failures, insufficient security controls, and other browser concerns. Open up the Issues panel in Chrome DevTools for more details on each issue.
Performance issues directly impact user engagement and conversion rates.
| Issue type |
|---|
| Content security policy |
These checks ensure that your page is following basic search engine optimization advice. There are many additional factors Lighthouse does not score here that may affect your search ranking, including performance on Core Web Vitals. Learn more about Google Search Essentials.
Descriptive link text helps search engines understand your content. Learn how to make links more accessible.
Performance issues directly impact user engagement and conversion rates.
| Link destination | Link Text |
|---|---|
| news.sparkfun.com/16344 | READ MORE |
| news.sparkfun.com/16312 | READ MORE |
| news.sparkfun.com/16278 | READ MORE |
| news.sparkfun.com/16245 | READ MORE |
Format your HTML in a way that enables crawlers to better understand your app’s content.
Industry-standard audits powered by Google Lighthouse. — Desktop
Key metrics that affect user experience. — Desktop
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
858 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
6.66 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
74 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.128
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
3.49 s
Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.
9.95 s
Audit breakdown by category with detailed findings.
Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.
Performance issues directly impact user engagement and conversion rates.
Polyfills and transforms enable older browsers to use new JavaScript features. However, many aren't necessary for modern browsers. Consider modifying your JavaScript build process to not transpile Baseline features, unless you know you must support older browsers. Learn why most sites can deploy ES6+ code without transpiling
Shipping ES5 transpiled code to modern browsers wastes bytes — every user with an evergreen browser pays for compatibility you don't need.
Most users today run browsers that natively support ES6+, async/await, optional chaining, and the rest of modern JavaScript. Transpiling to ES5 'just in case' adds 20-40% to your bundle for no benefit. Configure your build to target a modern browserslist, or ship a differential bundle pair (modern + legacy) with the module/nomodule pattern.
Source: Google web.dev / Lighthouse
3rd party code can significantly impact load performance. Reduce and defer loading of 3rd party code to prioritize your page's content.
Performance issues directly impact user engagement and conversion rates.
A long cache lifetime can speed up repeat visits to your page. Learn more about caching.
Performance issues directly impact user engagement and conversion rates.
| Request | Cache TTL | Transfer Size |
|---|---|---|
| js.hsforms.net/forms/embed/v2.js | 300.0 s | 193.8 KiB |
| i.ytimg.com/vi/Q4csFhDtCt4/hqdefault.jpg | 7200.0 s | 44.9 KiB |
| livesearch-autocomplete.magento-ds.com/v1/LiveSearchAutocomplete.js | 0.0 ms | 32.2 KiB |
| i.ytimg.com/vi/sqTIUvmcUvY/hqdefault.jpg | 7200.0 s | 39.8 KiB |
| i.ytimg.com/vi/hm-n1yeiu6M/hqdefault.jpg | 7200.0 s | 35.4 KiB |
| livesearch-metrics.magento-ds.com/v0/liveSearchMetrics.js | 0.0 ms | 19.1 KiB |
| js.braintreegateway.com/web/3.112.0/js/paypal-checkout.min.js | 3600.0 s | 16.5 KiB |
| js.braintreegateway.com/web/3.112.0/js/client.min.js | 3600.0 s | 12.8 KiB |
| magento-recs-sdk.adobe.net/v2/index.js | 0.0 ms | 9.7 KiB |
| i.ytimg.com/vi/sXuw1smWxhQ/hqdefault.jpg | 7200.0 s | 12.4 KiB |
| commerce.adobedtm.com/v6/ds.min.js | 0.0 ms | 8.0 KiB |
| widget.trustpilot.com/bootstrap/v5/tp.widget.bootstrap.min.js | 86400.0 s | 8.1 KiB |
| rum.hlx.page/.rum/@adobe/helix-rum-js@%5E2/dist/rum-standalone.js | 3600.0 s | 2.8 KiB |
| invitejs.trustpilot.com/tp.min.js | 86400.0 s | 4.0 KiB |
| commerce.adobedtm.com/recommendations/events/v1/recommendationsEvents.min.js | 0.0 ms | 1.3 KiB |
Layout shifts occur when elements move absent any user interaction. Investigate the causes of layout shifts, such as elements being added, removed, or their fonts changing as the page loads.
Performance issues directly impact user engagement and conversion rates.
A forced reflow occurs when JavaScript queries geometric properties (such as offsetWidth) after styles have been invalidated by a change to the DOM state. This can result in poor performance. Learn more about forced reflows and possible mitigations.
Performance issues directly impact user engagement and conversion rates.
Reducing the download time of images can improve the perceived load time of the page and LCP. Learn more about optimizing image size
Performance issues directly impact user engagement and conversion rates.
| URL | Resource Size | Est Savings | |
|---|---|---|---|
New
Product
BlueSMiRF v2 - JST
A wireless serial bridge made for Bluetooth-enab… div > div.content-col-md-5 > a > div.pagebuilder-slide-wrapper | /media/.renditions/wysiwyg/homepage/FeaturedContent/Secon... | 224.1 KiB | 152.9 KiB |
Upgrade Your RTK GNSS Board with Tilt Compensation div.sparkfun-blog-item > figure > a > img | cdn.sparkfun.com/c/500-282/assets/home_page_posts/1/6/2/4/5/tilt-comp-line.png | 149.3 KiB | 140.3 KiB |
New
Product
Thing Plus - ESP32-C5
The latest ESP32 board for wireless applicati… div > div.content-col-md-5 > a > div.pagebuilder-slide-wrapper | /media/.renditions/wysiwyg/homepage/FeaturedContent/Large... | 207.7 KiB | 136.5 KiB |
Mic Price Check div.sparkfun-blog-item > figure > a > img | cdn.sparkfun.com/c/500-282/assets/home_page_posts/1/6/3/4/4/SoundThumb.png | 129.5 KiB | 120.5 KiB |
Fan
Favorite
More speed and power than you ever thought possible in a microcon… div.pagebuilder-column > div.content-col-md-5 > a > div.pagebuilder-banner-wrapper | /media/.renditions/wysiwyg/homepage/FeaturedContent/Secon... | 153.5 KiB | 116.2 KiB |
A hand interacting with buttons on a breadboard div.pagebuilder-column > figure > a > img.pagebuilder-mobile-hidden | /media/.renditions/wysiwyg/homepage/categories/kits.jpg?f... | 118.7 KiB | 109.0 KiB |
Explore SparkFun's versatile lineup of RedBoards all designed in the familiar A… div.pagebuilder-column > div.content-showcase > a > div.pagebuilder-banner-wrapper | /media/.renditions/wysiwyg/homepage/ecosystem/redboard-li... | 160.3 KiB | 104.4 KiB |
New
Product
9DoF IMU Breakout - IM19
A motion tracking breakout that brings tog… div > div.content-col-md-5 > a > div.pagebuilder-slide-wrapper | /media/.renditions/wysiwyg/homepage/FeaturedContent/Secon... | 167.3 KiB | 96.1 KiB |
Use Galileo's Free High Accuracy Service With The TX2 div.sparkfun-blog-item > figure > a > img | /c/500-282/assets/home_page_posts/1/6/3/1/2/Galileo-HAS-E... | 84.9 KiB | 75.9 KiB |
Thing Plus boards come in a familiar footprint all with different specificatio… div.pagebuilder-column > div.content-showcase > a > div.pagebuilder-banner-wrapper | /media/.renditions/wysiwyg/homepage/ecosystem/thing-plus-... | 129.9 KiB | 74.1 KiB |
A solderless, modular interface ecosystem that allows you to interchange your c… div.pagebuilder-column > div.content-col-md-5 > a > div.pagebuilder-banner-wrapper | /media/.renditions/wysiwyg/homepage/ecosystem/micromod-da... | 123.8 KiB | 68.0 KiB |
Qwiic & Easy DIY Ambient Light Indicator li.sparkfun-resources-item > figure > a.light-contrast > img | /c/500-282/assets/learn_tutorials/3/8/7/0/Ambient-Light-S... | 56.1 KiB | 53.0 KiB |
What's the difference between the ZED-F9P and the ZED-X20P? li.sparkfun-resources-item > figure > a.light-contrast > img | /c/500-282/assets/learn_tutorials/4/0/6/8/zed-x20p-vs-zed... | 50.3 KiB | 47.2 KiB |
Protyping with I²C has never been more simple.
Learn More div.pagebuilder-column > div.content-align-md-top > a > div.pagebuilder-banner-wrapper | /media/.renditions/wysiwyg/homepage/ecosystem/qwiic-conne... | 99.6 KiB | 43.8 KiB |
A full suite of products dedicated to knowing where you stand.
Position, Navig… div.pagebuilder-column > div.content-align-md-top > a > div.pagebuilder-banner-wrapper | /media/.renditions/wysiwyg/homepage/ecosystem/sparkpnt-fa... | 97.2 KiB | 35.5 KiB |
The History of BlueSMiRF div.sparkfun-blog-item > figure > a > img | /c/500-282/assets/home_page_posts/1/6/2/7/8/example-mate-... | 42.0 KiB | 33.0 KiB |
Wireless Bluetooth board with data on a smartphone div.pagebuilder-column > figure > a > img.pagebuilder-mobile-hidden | /media/.renditions/wysiwyg/homepage/categories/BluetoothT... | 41.6 KiB | 32.0 KiB |
The SparkFun RTK Facet in its black carrying case with accessories on a white b… a > span.product-image-container > span.product-image-wrapper > img.product-image-photo | /media/catalog/product/cache/df4360b598d6f0c75fa659693b37... | 34.0 KiB | 29.2 KiB |
The SparkFun 9DoF IMU Breakout - IM19 diagonally from the top. a > span.product-image-container > span.product-image-wrapper > img.product-image-photo | /media/catalog/product/cache/df4360b598d6f0c75fa659693b37... | 33.9 KiB | 29.1 KiB |
Hello World! displayed on an LCD div.pagebuilder-column > figure > a > img.pagebuilder-mobile-hidden | /media/.renditions/wysiwyg/homepage/categories/DisplayOLE... | 36.2 KiB | 26.6 KiB |
Top
Seller
Automatically detects Qwiic sensors and starts logging data instant… div.pagebuilder-column > div.content-col-md-7 > a > div.pagebuilder-banner-wrapper | /media/.renditions/wysiwyg/homepage/FeaturedContent/Secon... | 58.2 KiB | 20.9 KiB |
Data Logger board with data on a computer in the background div.pagebuilder-column > figure > a > img.pagebuilder-mobile-hidden | /media/.renditions/wysiwyg/homepage/categories/DataLogger... | 26.0 KiB | 16.5 KiB |
A weather meter being hooked up div.pagebuilder-column > figure > a > img.pagebuilder-mobile-hidden | /media/.renditions/wysiwyg/homepage/categories/Environmen... | 25.3 KiB | 16.1 KiB |
A person controlling audio knobs with a speaker in the background div.pagebuilder-column > figure > a > img.pagebuilder-mobile-hidden | /media/.renditions/wysiwyg/homepage/categories/AudioThumb... | 22.6 KiB | 14.4 KiB |
Biometric sensor on an arm div.pagebuilder-column > figure > a > img.pagebuilder-mobile-hidden | /media/.renditions/wysiwyg/homepage/categories/biometrics... | 22.2 KiB | 14.1 KiB |
SparkFun's own fully certified, ultra low power microprocessor module.
Learn M… div.pagebuilder-column > div.content-showcase > a > div.pagebuilder-banner-wrapper | /media/.renditions/wysiwyg/homepage/ecosystem/artemis-lig... | 44.6 KiB | 12.3 KiB |
A person swiping his RFID card div.pagebuilder-column > figure > a > img.pagebuilder-mobile-hidden | /media/.renditions/wysiwyg/homepage/categories/rfid-featu... | 11.0 KiB | 7.0 KiB |
SparkFun GPS Dead Reckoning Breakout - NEO-M8U (Qwiic) a > span.product-image-container > span.product-image-wrapper > img.product-image-photo | /media/catalog/product/cache/df4360b598d6f0c75fa659693b37... | 11.2 KiB | 6.3 KiB |
SparkPNT FPX-T a > span.product-image-container > span.product-image-wrapper > img.product-image-photo | /media/catalog/product/cache/df4360b598d6f0c75fa659693b37... | 11.2 KiB | 6.3 KiB |
Raspberry Pi 5 - 16GB a > span.product-image-container > span.product-image-wrapper > img.product-image-photo | /media/catalog/product/cache/df4360b598d6f0c75fa659693b37... | 10.8 KiB | 6.0 KiB |
SparkPNT FPX a > span.product-image-container > span.product-image-wrapper > img.product-image-photo | /media/catalog/product/cache/df4360b598d6f0c75fa659693b37... | 10.8 KiB | 5.9 KiB |
SparkPNT FPM-T a > span.product-image-container > span.product-image-wrapper > img.product-image-photo | /media/catalog/product/cache/df4360b598d6f0c75fa659693b37... | 10.6 KiB | 5.7 KiB |
SparkPNT FPM a > span.product-image-container > span.product-image-wrapper > img.product-image-photo | /media/catalog/product/cache/df4360b598d6f0c75fa659693b37... | 10.2 KiB | 5.3 KiB |
Feature image of the Teensy 4.0 on a white background. a > span.product-image-container > span.product-image-wrapper > img.product-image-photo | /media/catalog/product/cache/df4360b598d6f0c75fa659693b37... | 10.2 KiB | 5.3 KiB |
SparkPNT FPL-T a > span.product-image-container > span.product-image-wrapper > img.product-image-photo | /media/catalog/product/cache/df4360b598d6f0c75fa659693b37... | 9.3 KiB | 4.9 KiB |
The SparkFun Qwiic Relay - 1x1A DPDT from a top angle. a > span.product-image-container > span.product-image-wrapper > img.product-image-photo | /media/catalog/product/cache/df4360b598d6f0c75fa659693b37... | 9.1 KiB | 4.7 KiB |
SparkPNT FPL a > span.product-image-container > span.product-image-wrapper > img.product-image-photo | /media/catalog/product/cache/df4360b598d6f0c75fa659693b37... | 8.7 KiB | 4.5 KiB |
The SparkFun Thing Plus - ESP32-C5 diagonally from the top. a > span.product-image-container > span.product-image-wrapper > img.product-image-photo | /media/catalog/product/cache/df4360b598d6f0c75fa659693b37... | 8.7 KiB | 4.5 KiB |
Raspberry Pi 4 Model B (8 GB) a > span.product-image-container > span.product-image-wrapper > img.product-image-photo | /media/catalog/product/cache/df4360b598d6f0c75fa659693b37... | 8.3 KiB | 4.3 KiB |
Front facing product photo of the NVIDIA Jetson Orin™ Nano Super Developer Kit … a > span.product-image-container > span.product-image-wrapper > img.product-image-photo | /media/catalog/product/cache/df4360b598d6f0c75fa659693b37... | 8.1 KiB | 4.2 KiB |
NVIDIA Jetson AGX Orin 64GB Developer Kit on a white background. a > span.product-image-container > span.product-image-wrapper > img.product-image-photo | /media/catalog/product/cache/df4360b598d6f0c75fa659693b37... | 8.0 KiB | 4.2 KiB |
SMD LED - RGB WS2812B (Whole Reel) a > span.product-image-container > span.product-image-wrapper > img.product-image-photo | /media/catalog/product/cache/df4360b598d6f0c75fa659693b37... | 7.7 KiB | 4.0 KiB |
Optimize LCP by making the LCP image discoverable from the HTML immediately, and avoiding lazy-loading
Performance issues directly impact user engagement and conversion rates.
Avoid chaining critical requests by reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.
Performance issues directly impact user engagement and conversion rates.
Requests are blocking the page's initial render, which may delay LCP. Deferring or inlining can move these network requests out of the critical path.
Performance issues directly impact user engagement and conversion rates.
Your first network request is the most important. Reduce its latency by avoiding redirects, ensuring a fast server response, and enabling text compression.
Performance issues directly impact user engagement and conversion rates.
HTTP/2 and HTTP/3 offer many benefits over HTTP/1.1, such as multiplexing. Learn more about using modern HTTP.
Performance issues directly impact user engagement and conversion rates.
These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.
Redirects introduce additional delays before the page can be loaded. Learn how to avoid page redirects.
Performance issues directly impact user engagement and conversion rates.
| URL | Time Spent |
|---|---|
| sparkfun.com/ | 204 ms |
| www.sparkfun.com/ | 0.0 ms |
These are the largest layout shifts observed on the page. Each table item represents a single layout shift, and shows the element that shifted the most. Below each item are possible root causes that led to the layout shift. Some of these layout shifts may not be included in the CLS metric value due to windowing. Learn how to improve CLS
Performance issues directly impact user engagement and conversion rates.
| Element | Layout shift score |
|---|---|
SIGN IN
My Cart
Search
Search entire store. Use arrow keys to navigate autocomp… body#html-body > div.page-wrapper | 0.128 |
All Categories div#store.menu > nav.navigation > ul#ui-id-1 > li.level0 | 0.004 |
New
Product
BlueSMiRF v2 - JST
A wireless serial bridge made for Bluetooth-enab… div.pagebuilder-column-group > div.pagebuilder-column-line > div.pagebuilder-column > div.pagebuilder-slider | 0.002 |
New
Product div.content-col-md-5 > a > div.pagebuilder-slide-wrapper > span.pagebuilder-label | 0.000 |
Time to Interactive is the amount of time it takes for the page to become fully interactive. Learn more about the Time to Interactive metric.
Performance issues directly impact user engagement and conversion rates.
Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity. Learn how to reduce unused CSS.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Est Savings |
|---|---|---|
| /static/version1775629953/frontend/SparkFun/default/defau... | 89.4 KiB | 81.5 KiB |
| /static/version1775629953/frontend/SparkFun/default/defau... | 25.5 KiB | 22.4 KiB |
Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity. Learn how to reduce unused JavaScript.
Multi-megabyte JavaScript bundles delay every interactive feature on the page.
This is the Lighthouse audit fired when too much JS is shipped relative to what executes. The fix isn't a config flag — it requires bundle analysis (webpack-bundle-analyzer, rollup-plugin-visualizer), splitting routes into chunks, lazy-loading off-screen components, and removing unused dependencies. Fundamentally different from minification: minifying reduces byte count, this reduces what's downloaded at all.
Source: Google web.dev / Lighthouse
| URL | Transfer Size | Est Savings |
|---|---|---|
| www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 361.8 KiB | 177.1 KiB |
| js.hsforms.net/forms/embed/v2.js | 186.5 KiB | 74.6 KiB |
| unpkg.com/@adobe/magento-storefront-event-collector@%5E1/dist/index.js | 44.9 KiB | 31.5 KiB |
| /static/version1775629953/base/Magento/base/default/knock... | 68.9 KiB | 24.9 KiB |
| www.sparkfun.com/static/version1775629953/base/Magento/base/default/jquery.js | 81.8 KiB | 23.0 KiB |
Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to reduce Javascript execution time.
Performance issues directly impact user engagement and conversion rates.
| URL | Total CPU Time | Script Evaluation | Script Parse |
|---|---|---|---|
| www.sparkfun.com/ | 1.6 s | 942 ms | 14 ms |
| Unattributable | 618 ms | 15 ms | 0.0 ms |
| www.sparkfun.com/static/version1775629953/base/Magento/base/default/jquery.js | 295 ms | 218 ms | 11 ms |
| /static/version1775629953/base/Magento/base/default/jquer... | 289 ms | 249 ms | 0.7 ms |
| /static/version1775629953/base/Magento/base/default/mage/... | 194 ms | 153 ms | 0.3 ms |
| /static/version1775629953/base/Magento/base/default/Spark... | 168 ms | 61 ms | 0.2 ms |
| /static/version1775629953/base/Magento/base/default/requi... | 151 ms | 112 ms | 2.1 ms |
| js-agent.newrelic.com/nr-spa-1.313.1.min.js | 126 ms | 92 ms | 2.7 ms |
| www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 112 ms | 85 ms | 23 ms |
| js.hsforms.net/forms/embed/v2.js | 103 ms | 84 ms | 15 ms |
| /static/version1775629953/frontend/SparkFun/default/defau... | 82 ms | 71 ms | 0.1 ms |
| /static/version1775629953/base/Magento/base/default/mage/... | 51 ms | 17 ms | 0.2 ms |
Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to minimize main-thread work
Performance issues directly impact user engagement and conversion rates.
| Category | Time Spent |
|---|---|
| Script Evaluation | 2.4 s |
| Other | 974 ms |
| Style & Layout | 552 ms |
| Script Parsing & Compilation | 196 ms |
| Parse HTML & CSS | 113 ms |
| Rendering | 59 ms |
| Garbage Collection | 47 ms |
Many navigations are performed by going back to a previous page, or forwards again. The back/forward cache (bfcache) can speed up these return navigations. Learn more about the bfcache
Performance issues directly impact user engagement and conversion rates.
| Failure reason | Failure type |
|---|---|
| Pages with cache-control:no-store header cannot enter back/forward cache. | Actionable |
| Pages whose main resource has cache-control:no-store cannot enter back/forward cache. | Not actionable |
| Back/forward cache is disabled because some JavaScript network request received resource with Cache-Control: no-store header. | Not actionable |
Minifying JavaScript files can reduce payload sizes and script parse time. Learn how to minify JavaScript.
Performance issues directly impact user engagement and conversion rates.
Large network payloads cost users real money and are highly correlated with long load times. Learn how to reduce payload sizes.
Performance issues directly impact user engagement and conversion rates.
Set an explicit width and height on image elements to reduce layout shifts and improve CLS. Learn how to set image dimensions
Performance issues directly impact user engagement and conversion rates.
| URL | |
|---|---|
A hand interacting with buttons on a breadboard div.pagebuilder-column > figure > a > img.pagebuilder-mobile-hidden | /media/.renditions/wysiwyg/homepage/categories/kits.jpg?f... |
A weather meter being hooked up div.pagebuilder-column > figure > a > img.pagebuilder-mobile-hidden | /media/.renditions/wysiwyg/homepage/categories/Environmen... |
Hello World! displayed on an LCD div.pagebuilder-column > figure > a > img.pagebuilder-mobile-hidden | /media/.renditions/wysiwyg/homepage/categories/DisplayOLE... |
A person swiping his RFID card div.pagebuilder-column > figure > a > img.pagebuilder-mobile-hidden | /media/.renditions/wysiwyg/homepage/categories/rfid-featu... |
A person controlling audio knobs with a speaker in the background div.pagebuilder-column > figure > a > img.pagebuilder-mobile-hidden | /media/.renditions/wysiwyg/homepage/categories/AudioThumb... |
Wireless Bluetooth board with data on a smartphone div.pagebuilder-column > figure > a > img.pagebuilder-mobile-hidden | /media/.renditions/wysiwyg/homepage/categories/BluetoothT... |
Data Logger board with data on a computer in the background div.pagebuilder-column > figure > a > img.pagebuilder-mobile-hidden | /media/.renditions/wysiwyg/homepage/categories/DataLogger... |
Biometric sensor on an arm div.pagebuilder-column > figure > a > img.pagebuilder-mobile-hidden | /media/.renditions/wysiwyg/homepage/categories/biometrics... |
Mic Price Check div.sparkfun-blog-item > figure > a > img | cdn.sparkfun.com/c/500-282/assets/home_page_posts/1/6/3/4/4/SoundThumb.png |
Use Galileo's Free High Accuracy Service With The TX2 div.sparkfun-blog-item > figure > a > img | /c/500-282/assets/home_page_posts/1/6/3/1/2/Galileo-HAS-E... |
The History of BlueSMiRF div.sparkfun-blog-item > figure > a > img | /c/500-282/assets/home_page_posts/1/6/2/7/8/example-mate-... |
Upgrade Your RTK GNSS Board with Tilt Compensation div.sparkfun-blog-item > figure > a > img | cdn.sparkfun.com/c/500-282/assets/home_page_posts/1/6/2/4/5/tilt-comp-line.png |
What's the difference between the ZED-F9P and the ZED-X20P? li.sparkfun-resources-item > figure > a.light-contrast > img | /c/500-282/assets/learn_tutorials/4/0/6/8/zed-x20p-vs-zed... |
Qwiic & Easy DIY Ambient Light Indicator li.sparkfun-resources-item > figure > a.light-contrast > img | /c/500-282/assets/learn_tutorials/3/8/7/0/Ambient-Light-S... |
Build Your Own High-Concentration CO2 Detector li.sparkfun-resources-item > figure > a.light-contrast > img | cdn.sparkfun.com/c/500-282/assets/learn_tutorials/3/9/6/9/Co2SensingCarThumb.png |
Breadboard Power Supply Kit 5V/3.3V Quickstart Guide li.sparkfun-resources-item > figure > a.light-contrast > img | /c/500-282/assets/learn_tutorials/3/8/3/7/Breadboard_powe... |
More information about the performance of your application. These numbers don't directly affect the Performance score.
These checks highlight opportunities to improve the accessibility of your web app. Automatic detection can only detect a subset of issues and does not guarantee the accessibility of your web app, so manual testing is also encouraged.
Properly ordered headings that do not skip levels convey the semantic structure of the page, making it easier to navigate and understand when using assistive technologies. Learn more about heading order.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
New Releases div.pagebuilder-column-line > div.pagebuilder-column > div > h5 |
Best Sellers div.pagebuilder-column-line > div.pagebuilder-column > div > h5 |
These are opportunities to improve keyboard navigation in your application.
Screen readers have a specific way of announcing lists. Ensuring proper list structure aids screen reader output. Learn more about proper list structure.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
comparison body#html-body > ul.compare |
Featured
Featured submenu
GPS / GNSS
GPS / GNSS submenu
Sensors
Sensors submenu… div.section-items > div#store.menu > nav.navigation > ul#ui-id-1 |
WED JAN 14 2026
What's the difference between the ZED-F9P and the ZED-X20P?
Th… div.tabs-content > div#OSKY766 > div > ul#sparkfun-resources-feed-1837347665 |
Screen readers require list items (`<li>`) to be contained within a parent `<ul>`, `<ol>` or `<menu>` to be announced properly. Learn more about proper list structure.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
Add to Cart
SparkFun 9DoF IMU Breakout - IM19
$199.95 div.slick-track > div#slick-slide10 > div > li.product-item |
Add to Cart
SEGGER J-Link EDU Mini (with USB-C Cable)
$89.95 div.slick-track > div#slick-slide11 > div > li.product-item |
Add to Cart
SparkFun BlueSMiRF v2 - JST
$12.95 div.slick-track > div#slick-slide12 > div > li.product-item |
Add to Cart
Akasa Pi-5 Pro - Aluminum Raspberry Pi 5 Enclosure
$29.95 div.slick-track > div#slick-slide13 > div > li.product-item |
Add to Cart
SparkFun Thing Plus - ESP32-C5
$24.95 div.slick-track > div#slick-slide14 > div > li.product-item |
Add to Cart
LIDAR-Lite v3
$149.99 div.slick-track > div#slick-slide20 > div > li.product-item |
Add to Cart
Teensy 4.1
$31.50 div.slick-track > div#slick-slide21 > div > li.product-item |
Add to Cart
Teensy 4.0
$23.80 div.slick-track > div#slick-slide22 > div > li.product-item |
Add to Cart
NVIDIA Jetson Orin™ Nano Super Developer Kit
$249.00 div.slick-track > div#slick-slide23 > div > li.product-item |
Raspberry Pi 5 - 16GB
$215.00 div.slick-track > div#slick-slide24 > div > li.product-item |
These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.
Touch targets with sufficient size and spacing help users who may have difficulty targeting small controls to activate the targets. Learn more about touch targets.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
Featured submenu nav.navigation > ul#ui-id-1 > li.level0 > button.sr-menu-button |
GPS / GNSS submenu nav.navigation > ul#ui-id-1 > li.level0 > button.sr-menu-button |
Sensors submenu nav.navigation > ul#ui-id-1 > li.level0 > button.sr-menu-button |
Development Boards submenu nav.navigation > ul#ui-id-1 > li.level0 > button.sr-menu-button |
IoT & Wireless submenu nav.navigation > ul#ui-id-1 > li.level0 > button.sr-menu-button |
Components submenu nav.navigation > ul#ui-id-1 > li.level0 > button.sr-menu-button |
Kits submenu nav.navigation > ul#ui-id-1 > li.level0 > button.sr-menu-button |
These items highlight common accessibility best practices.
Issues logged to the `Issues` panel in Chrome Devtools indicate unresolved problems. They can come from network request failures, insufficient security controls, and other browser concerns. Open up the Issues panel in Chrome DevTools for more details on each issue.
Performance issues directly impact user engagement and conversion rates.
| Issue type |
|---|
| Content security policy |
These checks ensure that your page is following basic search engine optimization advice. There are many additional factors Lighthouse does not score here that may affect your search ranking, including performance on Core Web Vitals. Learn more about Google Search Essentials.
Descriptive link text helps search engines understand your content. Learn how to make links more accessible.
Performance issues directly impact user engagement and conversion rates.
| Link destination | Link Text |
|---|---|
| news.sparkfun.com/16344 | READ MORE |
| news.sparkfun.com/16312 | READ MORE |
| news.sparkfun.com/16278 | READ MORE |
| news.sparkfun.com/16245 | READ MORE |
Format your HTML in a way that enables crawlers to better understand your app’s content.
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