United Stated · New York Completed: Apr 16, 2026 17:51 UTCMobile 375 × 812
Desktop 1440 × 900
Score: 71 / 100
Based on 8 categories, 0 sections
Room to improve — your 29.0s 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.
Solid infrastructure — fast server responses across the board.
Mostly compliant — a few items need attention.
Rich content metadata — your pages look great everywhere.
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.
HSTS 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 24.6 MB (8.4 MB transferred)
Performance issues directly impact user engagement and conversion rates.
1 button(s) with no accessible text
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/d817eb10-c060-4aa1-b1e0-5eaf6231a9c9)<a href="https://beavercheck.com/results/d817eb10-c060-4aa1-b1e0-5eaf6231a9c9"><img src="https://beavercheck.com/badge?url=https%3A%2F%2Fklaviyo.com" alt="BeaverCheck Score"></a>https://beavercheck.com/badge?url=https%3A%2F%2Fklaviyo.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 29.0s 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.
7 barrier(s) likely increasing bounce by ~28%.
Page takes 29.0s to load
+12% bounceUsers abandon at ~3s — you're 26.5s over the 2.5s threshold
Fix: Optimize render-blocking resources, preload the hero image, and compress images
Page feels frozen for 7.3s
+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
1 form field(s) without a label
+2% 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
Content is hard to read
+2% bounceGraduate-level reading difficulty — limits the addressable audience for product or blog pages
Fix: Shorten sentences; replace jargon with plain language; target Flesch ease ≥60
13 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
Preliminary CRO audit — each barrier links to the tab with detailed analysis.
$500 investment → $2.12/month returns + USD 157,500 risk avoided
$500
5h · 5 findings
$2.12 /mo
~$25 / year
USD 157,500
if kept compliant
$150 — 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.
5.0 developer hours at $100/hr
Based on United States rates ($100/hr)
Start here for the best return on investment
$13,127 / month at risk
~$157,525 / year if left unfixed
$157,500
+7 more
$2.12 /mo
26528.8 MB/mo × 0.080 USD/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.
13.74 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
29.01 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
7.29 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.095
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
13.74 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.
44.21 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.
Consider setting font-display to swap or optional to ensure text is consistently visible. swap can be further optimized to mitigate layout shifts with font metric overrides.
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.
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.
| URL | Transfer Size | Duration |
|---|---|---|
| js.hsforms.net/forms/embed/v2.js | 192.8 KiB | 4.4 s |
| www.klaviyo.com/_astro/_slug_.CnM0hNPv.css | 82.7 KiB | 2.1 s |
| www.klaviyo.com/_astro/_slug_.BvW1h4Mx.css | 52.0 KiB | 759 ms |
| /cm/f3c1005b-8270-469c-85a4-81fe6c9b70e7/airgap.js?cacheB... | 52.3 KiB | 2.1 s |
| www.klaviyo.com/_astro/search-all.m1xffSh9.css | 1.5 KiB | 152 ms |
| www.klaviyo.com/_astro/_slug_.BDT10Tg6.css | 2.0 KiB | 152 ms |
| www.klaviyo.com/_astro/_slug_.DvI8RS7H.css | 1.7 KiB | |
| www.klaviyo.com/_astro/_slug_.D3MZUVNB.css | 1.4 KiB | |
| www.klaviyo.com/_astro/b2c-crm.DpvF8IOm.css | 5.6 KiB | |
| js.hs-scripts.com/48163345.js | 1018 B | 771 ms |
| www.klaviyo.com/_astro/b2c-crm.DTH_tWV7.css | 15.8 KiB | 304 ms |
| static.klaviyo.com/onsite/js/klaviyo.js?company_id=9BX3wh | 2.9 KiB | 757 ms |
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.
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 | |
|---|---|---|---|
Klaviyo service UI showing helpdesk inbox and customer hub ul.section-carousel-track > li.section-carousel-item > article.platform-slide > img.platform-slide-image | www.klaviyo.com/_astro/explore-service.C5G6NCUb_1QjDLN.webp | 86.2 KiB | 83.6 KiB |
Klaviyo CDP showing customer segment builder and profile view ul.section-carousel-track > li.section-carousel-item > article.platform-slide > img.platform-slide-image | www.klaviyo.com/_astro/explore-data-platform.B-fL0Ppj_Z1zyGNP.webp | 62.1 KiB | 60.2 KiB |
Klaviyo AI Composer interface building an on-brand campaign ul.section-carousel-track > li.section-carousel-item > article.platform-slide > img.platform-slide-image | www.klaviyo.com/_astro/explore-ai.DvXXEKiS_Z3D8pY.webp | 45.6 KiB | 44.2 KiB |
Klaviyo marketing platform UI showing segmented email and SMS flows ul.section-carousel-track > li.section-carousel-item > article.platform-slide > img.platform-slide-image | www.klaviyo.com/_astro/explore-marketing.BA4hBAO7_14SODm.webp | 35.4 KiB | 34.3 KiB |
Klaviyo analytics dashboard showing attributed revenue over time ul.section-carousel-track > li.section-carousel-item > article.platform-slide > img.platform-slide-image | www.klaviyo.com/_astro/explore-analytics.OXFDJdVV_1Jwnfa.webp | 28.5 KiB | 27.6 KiB |
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 |
|---|---|
| klaviyo.com/ | 754 ms |
| www.klaviyo.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.
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 |
|---|---|---|
| www.klaviyo.com/_astro/_slug_.CnM0hNPv.css | 82.6 KiB | 78.3 KiB |
| www.klaviyo.com/_astro/_slug_.BvW1h4Mx.css | 51.9 KiB | 51.7 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
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 | 16.0 s |
| Other | 5.1 s |
| Style & Layout | 1.7 s |
| Script Parsing & Compilation | 1.5 s |
| Garbage Collection | 575 ms |
| Parse HTML & CSS | 376 ms |
| Rendering | 336 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 WebSocket cannot enter back/forward cache. | Pending browser support |
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.
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.
Using ARIA attributes in roles where they are prohibited can mean that important information is not communicated to users of assistive technologies. Learn more about prohibited ARIA roles.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
AI assistant body > q-focus-sentinel > div |
After AI assistant body > q-focus-sentinel > div |
AI assistant, start div#qualified-multimodal-host > div |
AI assistant, end div#qualified-multimodal-host > div |
These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.
Low-contrast text is difficult or impossible for many users to read. Learn how to provide sufficient color contrast.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
Powering 193,000+ relationship-driven brands across 100 countries div.homepage > section > div.section-content > p |
These are opportunities to improve the legibility of your content.
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 |
|---|
Go to slide 1: Marketing that carries the conversation div.carousel-wrapper > div.carousel-controls > div.carousel-dots > button.carousel-dot |
Go to slide 2: AI built for every customer moment div.carousel-wrapper > div.carousel-controls > div.carousel-dots > button.carousel-dot |
Go to slide 3: Service that solves and sells div.carousel-wrapper > div.carousel-controls > div.carousel-dots > button.carousel-dot |
Go to slide 4: Analytics that deliver your next win div.carousel-wrapper > div.carousel-controls > div.carousel-dots > button.carousel-dot |
Go to slide 5: CDP that gives you the full data story div.carousel-wrapper > div.carousel-controls > div.carousel-dots > button.carousel-dot |
These items highlight common accessibility best practices.
Visible text labels that do not match the accessible name can result in a confusing experience for screen reader users. Learn more about accessible names.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
Watch video section > div.section-content > video-modal-trigger.video-modal-trigger > button.video-trigger |
Deprecated APIs will eventually be removed from the browser. Learn more about deprecated APIs.
Performance issues directly impact user engagement and conversion rates.
| Deprecation / Warning | Source |
|---|---|
| SharedStorage | |
| AttributionReporting | www.klaviyo.com/_astro/page.Dw4hn96J.js line 16, col 8428 |
Errors logged to the console indicate unresolved problems. They can come from network request failures and other browser concerns. Learn more about this errors in console diagnostic audit
Performance issues directly impact user engagement and conversion rates.
| Source | Description |
|---|---|
www.klaviyo.com/_astro/page.Dw4hn96J.js line 16, col 3291 | [OPTIMIZELY] - ERROR 2026-04-16T17:50:03.595Z OPTIMIZELY: Feature key undefined is not in datafile. |
Attestation check for Shared Storage on https://ara.paa-reporting-advertising.amazon failed. | |
Attestation check for Shared Storage on https://ara.paa-reporting-advertising.amazon failed. | |
Attestation check for Shared Storage on https://ara.paa-reporting-advertising.amazon failed. | |
Attestation check for Shared Storage on https://ara.paa-reporting-advertising.amazon failed. | |
Attestation check for Shared Storage on https://ara.paa-reporting-advertising.amazon failed. | |
Failed to load resource: the server responded with a status of 401 () |
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 |
|---|---|
| www.klaviyo.com/composer | Learn 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.
1.29 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
2.47 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
968 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.016
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
2.90 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.
9.75 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.
Consider setting font-display to swap or optional to ensure text is consistently visible. swap can be further optimized to mitigate layout shifts with font metric overrides.
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 | |
|---|---|---|---|
Klaviyo Composer generating a Boston Marathon campaign for Eastie, alongside a … div.homepage > section > div.section-content > img.finish-strong-image | www.klaviyo.com/_astro/finish-strong.rRKYr8OF_Zkixwh.webp | 88.5 KiB | 72.5 KiB |
Klaviyo service UI showing helpdesk inbox and customer hub ul.section-carousel-track > li.section-carousel-item > article.platform-slide > img.platform-slide-image | www.klaviyo.com/_astro/explore-service.C5G6NCUb_1QjDLN.webp | 86.2 KiB | 62.3 KiB |
Klaviyo AI Composer interface building an on-brand campaign ul.section-carousel-track > li.section-carousel-item > article.platform-slide > img.platform-slide-image | www.klaviyo.com/_astro/explore-ai.DvXXEKiS_Z3D8pY.webp | 45.6 KiB | 33.0 KiB |
Klaviyo marketing platform UI showing segmented email and SMS flows ul.section-carousel-track > li.section-carousel-item > article.platform-slide > img.platform-slide-image | www.klaviyo.com/_astro/explore-marketing.BA4hBAO7_14SODm.webp | 35.4 KiB | 25.3 KiB |
Klaviyo analytics dashboard showing attributed revenue over time ul.section-carousel-track > li.section-carousel-item > article.platform-slide > img.platform-slide-image | www.klaviyo.com/_astro/explore-analytics.OXFDJdVV_1Jwnfa.webp | 28.5 KiB | 20.6 KiB |
Klaviyo flag ul.carousel-track > li.carousel-item > div.card-photo-wrapper > img.card-photo | www.klaviyo.com/_astro/orange-flag-graphic.DG4gD_9z_Z2cdWBf.webp | 21.1 KiB | 18.1 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.
| URL | Transfer Size | Duration |
|---|---|---|
| js.hsforms.net/forms/embed/v2.js | 192.8 KiB | 606 ms |
| /cm/f3c1005b-8270-469c-85a4-81fe6c9b70e7/airgap.js?cacheB... | 52.3 KiB | 357 ms |
| www.klaviyo.com/_astro/_slug_.BvW1h4Mx.css | 52.0 KiB | 126 ms |
| www.klaviyo.com/_astro/b2c-crm.DpvF8IOm.css | 5.6 KiB | |
| www.klaviyo.com/_astro/b2c-crm.DTH_tWV7.css | 15.7 KiB | 84 ms |
| www.klaviyo.com/_astro/_slug_.CnM0hNPv.css | 82.7 KiB | 209 ms |
| www.klaviyo.com/_astro/_slug_.BDT10Tg6.css | 2.0 KiB | |
| www.klaviyo.com/_astro/search-all.m1xffSh9.css | 1.5 KiB | |
| www.klaviyo.com/_astro/_slug_.DvI8RS7H.css | 1.7 KiB | |
| www.klaviyo.com/_astro/_slug_.D3MZUVNB.css | 1.4 KiB | |
| js.hs-scripts.com/48163345.js | 995 B | 222 ms |
| static.klaviyo.com/onsite/js/klaviyo.js?company_id=9BX3wh | 2.9 KiB | 209 ms |
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.
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 |
|---|---|
| klaviyo.com/ | 205 ms |
| www.klaviyo.com/ | 0.0 ms |
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.
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.
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 |
|---|---|---|
| www.klaviyo.com/_astro/_slug_.CnM0hNPv.css | 82.5 KiB | 74.9 KiB |
| www.klaviyo.com/_astro/_slug_.BvW1h4Mx.css | 51.9 KiB | 51.7 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
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 | 4.4 s |
| Other | 1.5 s |
| Style & Layout | 692 ms |
| Script Parsing & Compilation | 375 ms |
| Garbage Collection | 147 ms |
| Rendering | 139 ms |
| Parse HTML & CSS | 115 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 WebSocket cannot enter back/forward cache. | Pending browser support |
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._universalMenuItem_s73z6_1 > div > div._imageContainer_s73z6_74 > img._image_s73z6_74 a._universalMenuItem_s73z6_1 > div > div._imageContainer_s73z6_74 > img._image_s73z6_74 | /images/6ct6b26e/marketing-prod/ce5b07ba71d2f4ad7dda0ced4... |
a._universalMenuItem_s73z6_1 > div > div._imageContainer_s73z6_74 > img._image_s73z6_74 a._universalMenuItem_s73z6_1 > div > div._imageContainer_s73z6_74 > img._image_s73z6_74 | /images/6ct6b26e/marketing-prod/5f35a8bf57394c93ee3d33466... |
a._universalMenuItem_s73z6_1 > div > div._imageContainer_s73z6_74 > img._image_s73z6_74 a._universalMenuItem_s73z6_1 > div > div._imageContainer_s73z6_74 > img._image_s73z6_74 | /images/6ct6b26e/marketing-prod/baeb51700705ac37ed422f09f... |
a._universalMenuItem_s73z6_1 > div > div._imageContainer_s73z6_74 > img._image_s73z6_74 a._universalMenuItem_s73z6_1 > div > div._imageContainer_s73z6_74 > img._image_s73z6_74 | /images/6ct6b26e/marketing-prod/ae936bd6b977ede47a4781738... |
a._universalMenuItem_s73z6_1 > div > div._imageContainer_s73z6_74 > img._image_s73z6_74 a._universalMenuItem_s73z6_1 > div > div._imageContainer_s73z6_74 > img._image_s73z6_74 | /images/6ct6b26e/marketing-prod/9de21910b9048ec6cb4ef0826... |
a._visualList_s73z6_83 > div > div._imageContainer_s73z6_74 > img._image_s73z6_74 a._visualList_s73z6_83 > div > div._imageContainer_s73z6_74 > img._image_s73z6_74 | /images/6ct6b26e/marketing-prod/ebac5b0bbbfad81c1d7784c51... |
a._visualList_s73z6_83 > div > div._imageContainer_s73z6_74 > img._image_s73z6_74 a._visualList_s73z6_83 > div > div._imageContainer_s73z6_74 > img._image_s73z6_74 | /images/6ct6b26e/marketing-prod/cbe11091b91c8f140bf47b665... |
a._visualList_s73z6_83 > div > div._imageContainer_s73z6_74 > img._image_s73z6_74 a._visualList_s73z6_83 > div > div._imageContainer_s73z6_74 > img._image_s73z6_74 | /images/6ct6b26e/marketing-prod/7c3c7232e4d426b133fb7a145... |
a._visualList_s73z6_83 > div > div._imageContainer_s73z6_74 > img._image_s73z6_74 a._visualList_s73z6_83 > div > div._imageContainer_s73z6_74 > img._image_s73z6_74 | /images/6ct6b26e/marketing-prod/810a806fe9ab3d05f9e2bfc70... |
a._visualList_s73z6_83 > div > div._imageContainer_s73z6_74 > img._image_s73z6_74 a._visualList_s73z6_83 > div > div._imageContainer_s73z6_74 > img._image_s73z6_74 | /images/6ct6b26e/marketing-prod/ea92879e13620ad4c849c1d03... |
a._visualList_s73z6_83 > div > div._imageContainer_s73z6_74 > img._image_s73z6_74 a._visualList_s73z6_83 > div > div._imageContainer_s73z6_74 > img._image_s73z6_74 | /images/6ct6b26e/marketing-prod/43f28b304c058503374e25edf... |
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.
Using ARIA attributes in roles where they are prohibited can mean that important information is not communicated to users of assistive technologies. Learn more about prohibited ARIA roles.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
Klay assistant body > q-focus-sentinel > div |
After Klay assistant body > q-focus-sentinel > div |
Klay assistant, start div#qualified-multimodal-host > div |
Klay assistant, end div#qualified-multimodal-host > div |
These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of 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 |
|---|
Go to slide 1: Marketing that carries the conversation div.carousel-wrapper > div.carousel-controls > div.carousel-dots > button.carousel-dot |
Go to slide 2: AI built for every customer moment div.carousel-wrapper > div.carousel-controls > div.carousel-dots > button.carousel-dot |
Go to slide 3: Service that solves and sells div.carousel-wrapper > div.carousel-controls > div.carousel-dots > button.carousel-dot |
Go to slide 4: Analytics that deliver your next win div.carousel-wrapper > div.carousel-controls > div.carousel-dots > button.carousel-dot |
Go to slide 5: CDP that gives you the full data story div.carousel-wrapper > div.carousel-controls > div.carousel-dots > button.carousel-dot |
These items highlight common accessibility best practices.
Visible text labels that do not match the accessible name can result in a confusing experience for screen reader users. Learn more about accessible names.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
Watch video section > div.section-content > video-modal-trigger.video-modal-trigger > button.video-trigger |
Deprecated APIs will eventually be removed from the browser. Learn more about deprecated APIs.
Performance issues directly impact user engagement and conversion rates.
| Deprecation / Warning | Source |
|---|---|
| SharedStorage | |
| AttributionReporting | www.klaviyo.com/_astro/page.Dw4hn96J.js line 16, col 8428 |
Errors logged to the console indicate unresolved problems. They can come from network request failures and other browser concerns. Learn more about this errors in console diagnostic audit
Performance issues directly impact user engagement and conversion rates.
| Source | Description |
|---|---|
www.klaviyo.com/_astro/page.Dw4hn96J.js line 16, col 3291 | [OPTIMIZELY] - ERROR 2026-04-16T17:50:43.690Z OPTIMIZELY: Feature key undefined is not in datafile. |
Attestation check for Shared Storage on https://ara.paa-reporting-advertising.amazon failed. | |
Attestation check for Shared Storage on https://ara.paa-reporting-advertising.amazon failed. | |
Attestation check for Shared Storage on https://ara.paa-reporting-advertising.amazon failed. | |
Attestation check for Shared Storage on https://ara.paa-reporting-advertising.amazon failed. | |
Attestation check for Shared Storage on https://ara.paa-reporting-advertising.amazon failed. | |
Failed to load resource: the server responded with a status of 401 () | |
ReferenceError: zaius is not defined
at <anonymous>:1:1
at https://www.googletagmanager.com/gtm.js?id=GTM-M28G2G:1069:429
at qR (https://www.googletagmanager.com/gtm.js?id=GTM-M28G2G:1071:31)
at Md.pR (https://www.googletagmanager.com/gtm.js?id=GTM-M28G2G:1068:92)
at Md.<anonymous> (https://www.googletagmanager.com/gtm.js?id=GTM-M28G2G:453:187)
at k.apply (https://www.googletagmanager.com/gtm.js?id=GTM-M28G2G:379:466)
at fb (https://www.googletagmanager.com/gtm.js?id=GTM-M28G2G:342:719)
at eb (https://www.googletagmanager.com/gtm.js?id=GTM-M28G2G:342:470)
at Md.<anonymous> (https://www.googletagmanager.com/gtm.js?id=GTM-M28G2G:403:473)
at k.apply (https://www.googletagmanager.com/gtm.js?id=GTM-M28G2G:379:466)
at fb (https://www.googletagmanager.com/gtm.js?id=GTM-M28G2G:342:719)
at k.gr (https://www.googletagmanager.com/gtm.js?id=GTM-M28G2G:342:1286)
at sf (https://www.googletagmanager.com/gtm.js?id=GTM-M28G2G:414:960)
at https://www.googletagmanager.com/gtm.js?id=GTM-M28G2G:888:315
at Oz (https://www.googletagmanager.com/gtm.js?id=GTM-M28G2G:810:1)
at Vz.evaluate (https://www.googletagmanager.com/gtm.js?id=GTM-M28G2G:814:732)
at e (https://www.googletagmanager.com/gtm.js?id=GTM-M28G2G:832:218)
at https://www.googletagmanager.com/gtm.js?id=GTM-M28G2G:347:125
at Array.<anonymous> (https://www.googletagmanager.com/gtm.js?id=GTM-M28G2G:833:388)
at Object.execute (https://www.googletagmanager.com/gtm.js?id=GTM-M28G2G:833:128)
at kB (https://www.googletagmanager.com/gtm.js?id=GTM-M28G2G:833:760)
at oB (https://www.googletagmanager.com/gtm.js?id=GTM-M28G2G:837:386)
at GC (https://www.googletagmanager.com/gtm.js?id=GTM-M28G2G:863:327)
at JC.b.push (https://www.googletagmanager.com/gtm.js?id=GTM-M28G2G:867:143)
at JC.b.push (https://www.googletagmanager.com/gtag/js?id=AW-607008856&cx=c>m=4e64f0:676:3)
at JC.b.push (https://www.googletagmanager.com/gtag/js?id=G-E2RS7HT946&cx=c>m=4e64f0:791:3)
at JC.b.push (https://www.googletagmanager.com/gtag/js?id=AW-878432221&cx=c>m=4e64f0:662:3)
at JC.b.push (https://www.googletagmanager.com/gtag/destination?id=DC-11549644&cx=c>m=4e64f0:617:3)
at JC.b.push (https://www.googletagmanager.com/gtag/destination?id=AW-997744385&cx=c>m=4e64f0:641:3)
at w.trackEvent (https://js.qualified.com/packs/js/analytics-5b4599f9.js:1:1337)
at https://js.qualified.com/packs/js/analytics-5b4599f9.js:1:2042
at Array.forEach (<anonymous>)
at https://js.qualified.com/packs/js/analytics-5b4599f9.js:1:2029
at t.emit (https://js.qualified.com/qualified.js?token=QXXydKGCPwwjwrgb:7:51599)
at im.emit (https://js.qualified.com/qualified.js?token=QXXydKGCPwwjwrgb:7:277791)
at E.eventHandler (https://js.qualified.com/packs/js/multimodal_v2-f8a905b1.js:2:62981)
at t.emit (https://js.qualified.com/qualified.js?token=QXXydKGCPwwjwrgb:7:51599)
at https://js.qualified.com/qualified.js?token=QXXydKGCPwwjwrgb:7:279667
at Array.forEach (<anonymous>)
at im.handleMessage (https://js.qualified.com/qualified.js?token=QXXydKGCPwwjwrgb:7:278065)
at ic.onReceived [as received] (https://js.qualified.com/qualified.js?token=QXXydKGCPwwjwrgb:7:280233)
at https://js.qualified.com/qualified.js?token=QXXydKGCPwwjwrgb:7:272453
at Array.map (<anonymous>)
at iu.notify (https://js.qualified.com/qualified.js?token=QXXydKGCPwwjwrgb:7:272418)
at io.message (https://js.qualified.com/qualified.js?token=QXXydKGCPwwjwrgb:7:270551) |
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 |
|---|---|
| www.klaviyo.com/composer | Learn more |
Format your HTML in a way that enables crawlers to better understand your app’s content.
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