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Step-by-step guides for moving between web technologies

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Contrast Checker

Check WCAG color contrast ratios between any two colors

Inspect HTTP response headers for any URL

Analyze SSL/TLS certificate details and chain

Look up DNS records for any domain

Redirect Checker

Trace the full redirect chain for any URL

Real-user INP and Core Web Vitals from Google's Chrome UX Report.

RESTful API for programmatic website audits

Embed an auto-updating health score badge on your site

https://www.drakes.com

Performance

· 28 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.

SCORE

78

GRADE

C

FIX

6

REVIEW

3

PASS

15

INFO

4

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

46

Performance

85

Accessibility

96

Best Practices

85

SEO

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

2.66 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

4.53 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

4.17 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.

5.70 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.

27.25 s

Page Load Progression

375 ms

750 ms

1.1 s

1.5 s

1.9 s

2.2 s

2.6 s

3.0 s

Checks

28

15 PASS 3 REVIEW 6 FIX

F

Page Weight Budget

Action

4.3 MB transferred, 436 requests

FIX

4.3 MB transferred, 436 requests

Page weighs 10.4 MB (4.3 MB transferred)

JavaScript is 2.0 MB — consider code splitting or lazy loading

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Got: 2.0 MB

436 HTTP requests — consider bundling or reducing

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Estimated 0.91 g CO2 per page load

4.3 MB transferred

436 requests

0.91 g CO2 per page load

JavaScript 2.0 MiB 47%

Other 1.0 MiB 24%

Images 805.1 KiB 18%

HTML 202.2 KiB 5%

Fonts 104.1 KiB 2%

Other 70.5 KiB 2%

CSS 68.7 KiB 2%

Other 22.1 KiB 0%

Other 9.9 KiB 0%

Other 0 B 0%

0 2.4 MB 4.9 MB

Over budget

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Why this matters

JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.

Source: web.dev

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Why this matters

High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.

Source: web.dev

F

JS Execution Cost

Action

17610ms total JS execution

FIX

17610ms total JS execution

https://www.drakes.com/cdn/wpm/b05c62d7ewbe538af9p...: 3403ms CPU time

https://www.drakes.com/: 2709ms CPU time

Unattributable: 2585ms CPU time

https://scripts.clarity.ms/0.8.75-beta/clarity.js: 2002ms CPU time

https://7ce243a1e1a2.cdn4.forter.com/sn/7ce243a1e1...: 1069ms CPU time

Third-party scripts: 7142ms (41% of total)

Main Thread Breakdown

Script Evaluation 61% Other 19% Style & Layout 11% Script Parsing & Compilation 5%

Script	Total	Scripting	Parse/Compile	Party
https://www.drakes.com/cdn/wpm/b05c62d7ewbe538af9pdeb4fec1me339d55am.js	3403ms	2341ms	39ms	1st
https://www.drakes.com/	2709ms	490ms	123ms	1st
Unattributable	2585ms	248ms	0ms	1st
https://scripts.clarity.ms/0.8.75-beta/clarity.js	2002ms	1947ms	10ms	3rd
https://7ce243a1e1a2.cdn4.forter.com/sn/7ce243a1e1a2/script.js	1069ms	982ms	65ms	3rd
https://js.klevu.com/core/v2/klevu.js	567ms	499ms	34ms	3rd
(program):2	466ms	176ms	0ms	1st
https://www.googletagmanager.com/gtm.js?id=GTM-MGDHK5JV	382ms	312ms	64ms	3rd
https://static.klaviyo.com/onsite/js/Render.46878820e7306.js?cb=2	329ms	290ms	38ms	3rd
https://js.klevu.com/theme/default/v2/quick-search-theme.js	284ms	197ms	53ms	3rd

Showing top 10 of 38 scripts

F

JS Bundles

Action

313 scripts, 563 KB unused

FIX

313 scripts, 563 KB unused

https://7ce243a1e1a2.cdn4.forter.com/sn/7ce243a1e1...: 96 KB unused (43%)

Consider code splitting or tree shaking to reduce unused code.

https://cdn-bundler.nice-team.net/app/js/bundler-s...: 86 KB unused (65%)

Consider code splitting or tree shaking to reduce unused code.

https://cdn-bundler.nice-team.net/app/js/bundler-s...: unminified — 44 KB could be saved

https://www.googletagmanager.com/gtm.js?id=GTM-MGD...: 69 KB unused (42%)

Consider code splitting or tree shaking to reduce unused code.

https://adsagentclientafd-b7hqhjdrf3fpeqh2.b01.azu...: 69 KB unused (85%)

Consider code splitting or tree shaking to reduce unused code.

https://static.klaviyo.com/onsite/js/Render.468788...: 52 KB unused (79%)

Consider code splitting or tree shaking to reduce unused code.

Total unused JavaScript: 563 KB

563 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://7ce243a1e1a2.cdn4.forter.com/sn/7ce243a1e1a2/script.js	226 KB	96 KB (43%)	✓	3rd
https://cdn-bundler.nice-team.net/app/js/bundler-script.js?shop=drakeslondon.myshopify.com&1787932099	134 KB	86 KB (65%)	✗	3rd
https://www.googletagmanager.com/gtm.js?id=GTM-MGDHK5JV	164 KB	69 KB (42%)	✓	3rd
https://adsagentclientafd-b7hqhjdrf3fpeqh2.b01.azurefd.net/assets/chunk-loading-CkfTysBR.js	82 KB	69 KB (85%)	✓	3rd
https://static.klaviyo.com/onsite/js/Render.46878820e7306.js?cb=2	66 KB	52 KB (79%)	✓	3rd
https://www.drakes.com/cdn/wpm/b05c62d7ewbe538af9pdeb4fec1me339d55am.js	83 KB	39 KB (48%)	✓	1st
https://media.9gtb.com/script.js?rev=671ba7a	62 KB	35 KB (58%)	✓	3rd
https://adsagentclientafd-b7hqhjdrf3fpeqh2.b01.azurefd.net/assets/chunk-i18n-Ba7l7jHz.js	60 KB	35 KB (59%)	✓	3rd
https://js.klevu.com/core/v2/klevu.js	54 KB	31 KB (57%)	✓	3rd
https://js.klevu.com/theme/default/v2/quick-search-theme.js	83 KB	27 KB (34%)	✓	3rd

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

D

Asset Compression

Action

5 of 8 asset hosts still on gzip

FIX

5 of 8 asset hosts still on gzip

cdn.shopify.com serves assets with brotli (assets: 23)

Got: cdn.shopify.com (application/x-javascript)

static.klaviyo.com serves assets with brotli (assets: 10)

Got: static.klaviyo.com (application/javascript)

cdn-bundler.nice-team.net serves assets with gzip; brotli would be ~20% smaller (assets: 5)

Every current browser accepts brotli. On a CDN this is a per-pull-zone toggle (Cloudflare, Fastly, CloudFront, CDN77, Bunny all expose it); on an origin it needs the brotli module (nginx-brotli, Apache mod_brotli). The saving lands on the assets this host serves, not on the HTML document -- the document's own encoding is reported separately.

Got: cdn-bundler.nice-team.net (application/javascript)

static-tracking.klaviyo.com serves assets with brotli (assets: 5)

Got: static-tracking.klaviyo.com (text/javascript)

drakes.wilford.ai serves assets with gzip; brotli would be ~20% smaller (assets: 4)

Every current browser accepts brotli. On a CDN this is a per-pull-zone toggle (Cloudflare, Fastly, CloudFront, CDN77, Bunny all expose it); on an origin it needs the brotli module (nginx-brotli, Apache mod_brotli). The saving lands on the assets this host serves, not on the HTML document -- the document's own encoding is reported separately.

Got: drakes.wilford.ai (text/css)

crossborder-integration.global-e.com serves assets with gzip; brotli would be ~20% smaller (assets: 3)

Every current browser accepts brotli. On a CDN this is a per-pull-zone toggle (Cloudflare, Fastly, CloudFront, CDN77, Bunny all expose it); on an origin it needs the brotli module (nginx-brotli, Apache mod_brotli). The saving lands on the assets this host serves, not on the HTML document -- the document's own encoding is reported separately.

Got: crossborder-integration.global-e.com (application/javascript)

foursixty.com serves assets with gzip; brotli would be ~20% smaller (assets: 3)

Every current browser accepts brotli. On a CDN this is a per-pull-zone toggle (Cloudflare, Fastly, CloudFront, CDN77, Bunny all expose it); on an origin it needs the brotli module (nginx-brotli, Apache mod_brotli). The saving lands on the assets this host serves, not on the HTML document -- the document's own encoding is reported separately.

Got: foursixty.com (text/css)

js.klevu.com serves assets with gzip; brotli would be ~20% smaller (assets: 3)

Every current browser accepts brotli. On a CDN this is a per-pull-zone toggle (Cloudflare, Fastly, CloudFront, CDN77, Bunny all expose it); on an origin it needs the brotli module (nginx-brotli, Apache mod_brotli). The saving lands on the assets this host serves, not on the HTML document -- the document's own encoding is reported separately.

Got: js.klevu.com (text/javascript)

F

Page Weight Inventory

Action

436 resources · 4.3 MB · 563 KB savings available

FIX

436 resources · 4.3 MB · 563 KB savings available

Page weight 4.3 MB exceeds 1 MB target by 3.3 MB

Got: 4.3 MB Expected: ≤ 1 MB

~563 KB of savings available

194 third-party resources (43% of weight)

1 resources over 200KB

436 resources · 4.3 MiB · 194 third-party 3.3 MiB over 1MB target

JavaScript 72% · 3.1 MiB

Image 18% · 806.9 KiB

Document 5% · 212.4 KiB

Font 2% · 104.1 KiB

CSS 2% · 68.7 KiB

Other 2% · 67.7 KiB

~562.9 KiB of savings available

Remove unused JavaScript: 562.9 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

436 resources			4.3 MiB

F

HTTP Caching

Action

No cache headers

FIX

No cache headers

No Cache-Control header found

Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

ETag present — enables conditional (304) responses

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

B

Third-Party Impact

43% third-party, 0 ms blocking

REVIEW

43% third-party, 0 ms blocking

Third-party code accounts for 43% of page weight (1.9 MiB of 4.3 MiB)

Third-party blocking time is low (0 ms)

57%

43%

First-party Third-party

B

Main HTML Cache-Control

No Cache-Control header on main HTML response

REVIEW

No Cache-Control header on main HTML response

Main HTML response has no Cache-Control header

Without an explicit Cache-Control, browsers fall back to heuristic caching (~10% of Last-Modified age). Set `Cache-Control: no-cache` or `max-age=300` for HTML to control freshness explicitly -- prevents stale auth state and SPA shell drift.

B

JavaScript Blocking

2 JS blocking issue(s) detected

REVIEW

2 JS blocking issue(s) detected

3 render-blocking <script src> tag(s) without async/defer

Each `<script src=...>` without `async`, `defer`, or `type="module"` blocks HTML parsing while the browser fetches and executes it. The block lasts the entire round-trip + execution time -- on slow networks this translates directly into LCP delay. Add `defer` (executes after parse, in source order) for scripts that interact with the DOM, or `async` (executes whenever ready) for analytics / independent scripts. Module scripts (`type="module"`) are deferred by default.

Total JS execution time is 17.6 s -- over the 3.5s budget

Total JavaScript execution (parse + compile + run) across all scripts exceeds 3.5 seconds. On low-end devices that becomes 7-15+ seconds and shows up directly in TBT and INP. Reduce by: tree-shaking unused dependencies, code-splitting (dynamic `import()`), removing or deferring third-party tracking, and replacing heavy frameworks where they're not needed.

A+

Text Compression

All text resources are compressed

PASS

All text resources are compressed

All text resources are compressed

All text resources are properly compressed.

A

Image Optimization

16 images, 0 KB saveable

PASS

16 images, 0 KB saveable

All images are well-optimized

16 images 805 KB

0 oversized -0 KB

3 legacy format

0 missing dimensions CLS risk

A+

Font Loading

7 fonts (104 KB)

PASS

7 fonts (104 KB)

7 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

7

104 KB total

Render-blocking

0

of 7

Dominant font-display

swap

Most common across fonts

Font loading timeline

Transfer FOIT (block) FOUT (swap)

kanit-v6-latin-regular.... woff2 swap

Size 20 KB

Load time 34 ms

Start 608 ms

Risk FOUT — text flashes from fallback to web font

kanit-v6-latin-700.woff2 woff2 swap

Size 20 KB

Load time 36 ms

Start 608 ms

Risk FOUT — text flashes from fallback to web font

P22UndergroundMedium.woff2 woff2 swap

Size 14 KB

Load time 174 ms

Start 788 ms

Risk FOUT — text flashes from fallback to web font

P22Underground-Book.woff2 woff2 swap

Size 16 KB

Load time 174 ms

Start 789 ms

Risk FOUT — text flashes from fallback to web font

Caslon224Std-Book.woff2 woff2 swap

Size 19 KB

Load time 152 ms

Start 809 ms

Risk FOUT — text flashes from fallback to web font

P22UndergroundLight.woff2 woff2 swap

Size 15 KB

Load time 25 ms

Start 1.2 s

Risk FOUT — text flashes from fallback to web font

Caslon224Std-Book.woff2 woff2 swap

Size 1 KB

Load time 193 ms

Start 3.3 s

Risk FOUT — text flashes from fallback to web font

Optimization checklist

Preload critical fonts (priority=high)
Use woff2 format for all fonts
Set font-display to swap, optional, or fallback
Subset large fonts (≤100 KB each)

A+

Resource Caching

All resources properly cached

PASS

All resources properly cached

No caching issues found

All static resources have appropriate caching headers.

A+

Critical Rendering Path

No render-blocking resources

PASS

No render-blocking resources

No render-blocking resources detected

A+

Resource Hints

194 hints, 0 missing preconnects

PASS

194 hints, 0 missing preconnects

Page uses 194 resource hint(s)

Current Resource Hints

preconnect

4

preload

2

dns-prefetch

1

prefetch

+177

187

194 resource hints configured

A+

HTTP/3 (QUIC)

HTTP/3 advertised via Alt-Svc

PASS

HTTP/3 advertised via Alt-Svc

HTTP/3 (QUIC) is supported

First-load mobile users on cellular networks see meaningful latency improvements with HTTP/3. The QUIC transport collapses TLS + TCP handshakes into one and recovers faster from packet loss.

A+

Document Compression

Document response uses brotli

PASS

Document response uses brotli

Main HTML response uses brotli (Content-Encoding: br)

Brotli is the best text-compression algorithm for general use, ~20% smaller than gzip on average (40% on smaller files). Modern browsers all support it.

A+

LCP Image Preload

LCP preload audit not available

PASS

LCP preload audit not available

LCP image preload audit not available for this scan

A+

Server-Timing Observability

18 Server-Timing entries advertised

PASS

18 Server-Timing entries advertised

Server-Timing header advertises 18 timing entries

A+

Server Response Intelligence

2 server-response signal(s) detected

PASS

2 server-response signal(s) detected

`Vary` header declared: accept-encoding

The page declares a `Vary` header, telling downstream caches which request headers the response varies on. Critical for content-negotiated responses (compression, language, cookies, device class).

`ETag` present -- conditional GET supported

A+

Render-Blocking Resources

No render-blocking resources detected

PASS

No render-blocking resources detected

No render-blocking resources detected in <head>

A+

Third-Party Resources

No third-party resources detected

PASS

No third-party resources detected

A

CSS Performance Depth

1 CSS depth issue(s) detected

PASS

1 CSS depth issue(s) detected

18 render-blocking stylesheet(s) -- recommended: <=3

Each `<link rel="stylesheet">` without a non-blocking `media` attribute holds up the first paint. Browsers download all of them before painting any content. Consolidate into 1-2 critical-path stylesheets; defer non-critical CSS via `<link rel="stylesheet" media="print" onload="this.media='all'">` or via the loadCSS pattern; inline above-the-fold CSS in `<style>` to short-circuit the request entirely.

A+

Green Hosting

Whether the site is served from green-energy infrastructure

PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

Network Waterfall

436 requests over 8862ms

INFO

HTML JavaScript CSS Images Fonts XHR/Fetch Other

Third-Party Script Cost

Per-script blocking time, transfer cost, and cache headers

INFO

41% of JavaScript execution is third-party

First-party Third-party 7142ms · 1179KB · €38/mo

Script	Category	Execution	Transfer	Unused	Monthly Cost	Verdict
Microsoft Clarity scripts.clarity.ms	Session Replay	2002ms	25 KB	—	€11/mo	Costly
7ce243a1e1a2.cdn4.forter.com 7ce243a1e1a2.cdn4.forter.com	Other	1069ms	226 KB	43%	€6/mo	Costly
js.klevu.com js.klevu.com	Other	567ms	54 KB	57%	€3/mo	Costly
Google Tag Manager www.googletagmanager.com	Tag Manager	382ms	164 KB	42%	€2/mo	Costly
static.klaviyo.com static.klaviyo.com	Other	329ms	66 KB	79%	€2/mo	Costly
js.klevu.com js.klevu.com	Other	284ms	83 KB	34%	€2/mo	Costly
cdn-bundler.nice-team.net cdn-bundler.nice-team.net	Other	214ms	134 KB	65%	€1/mo	Costly
drakes.wilford.ai drakes.wilford.ai	Other	203ms	46 KB	—	€1/mo	Costly
foursixty.com foursixty.com	Other	202ms	32 KB	—	€1/mo	Costly
cdn.shopify.com cdn.shopify.com	Other	199ms	22 KB	—	€1/mo	Optional
cdn.shopify.com cdn.shopify.com	Other	185ms	8 KB	—	€1/mo	Optional
cdn.shopify.com cdn.shopify.com	Other	184ms	47 KB	—	€1/mo	Optional
static.klaviyo.com static.klaviyo.com	Other	177ms	7 KB	—	€1/mo	Optional
adsagentclientafd-b7hqhjdrf3fpeqh2.b01.azurefd.net adsagentclientafd-b7hqhjdrf3fpeqh2.b01.azurefd.net	Other	162ms	60 KB	59%	€1/mo	Optional
static.klaviyo.com static.klaviyo.com	Other	142ms	15 KB	—	€1/mo	Optional
crossborder-integration.global-e.com crossborder-integration.global-e.com	Other	119ms	24 KB	—	€1/mo	Optional
static.klaviyo.com static.klaviyo.com	Other	116ms	10 KB	—	€1/mo	Optional
cdn.shopify.com cdn.shopify.com	Other	98ms	14 KB	—	€1/mo	Optional
static.klaviyo.com static.klaviyo.com	Other	94ms	8 KB	—	€0/mo	Optional
media.9gtb.com media.9gtb.com	Other	88ms	62 KB	58%	€0/mo	Optional
cdn-bundler.nice-team.net cdn-bundler.nice-team.net	Other	87ms	29 KB	—	€0/mo	Optional
static.klaviyo.com static.klaviyo.com	Other	78ms	26 KB	—	€0/mo	Optional
js.klevu.com js.klevu.com	Other	58ms	7 KB	—	€0/mo	Optional
widget.trustpilot.com widget.trustpilot.com	Other	53ms	8 KB	—	€0/mo	Optional
cdn.shopify.com cdn.shopify.com	Other	50ms	0 KB	—	€0/mo	Optional

Microsoft Clarity

Session Replay

Costly

Execution 2002ms

Transfer 25 KB

Monthly Cost €11/mo

7ce243a1e1a2.cdn4.forter.com

Other

Costly

Execution 1069ms

Transfer 226 KB

Unused 43%

Monthly Cost €6/mo

js.klevu.com

Other

Costly

Execution 567ms

Transfer 54 KB

Unused 57%

Monthly Cost €3/mo

Google Tag Manager

Tag Manager

Costly

Execution 382ms

Transfer 164 KB

Unused 42%

Monthly Cost €2/mo

static.klaviyo.com

Other

Costly

Execution 329ms

Transfer 66 KB

Unused 79%

Monthly Cost €2/mo

js.klevu.com

Other

Costly

Execution 284ms

Transfer 83 KB

Unused 34%

Monthly Cost €2/mo

cdn-bundler.nice-team.net

Other

Costly

Execution 214ms

Transfer 134 KB

Unused 65%

Monthly Cost €1/mo

drakes.wilford.ai

Other

Costly

Execution 203ms

Transfer 46 KB

Monthly Cost €1/mo

foursixty.com

Other

Costly

Execution 202ms

Transfer 32 KB

Monthly Cost €1/mo

cdn.shopify.com

Other

Optional

Execution 199ms

Transfer 22 KB

Monthly Cost €1/mo

cdn.shopify.com

Other

Optional

Execution 185ms

Transfer 8 KB

Monthly Cost €1/mo

cdn.shopify.com

Other

Optional

Execution 184ms

Transfer 47 KB

Monthly Cost €1/mo

static.klaviyo.com

Other

Optional

Execution 177ms

Transfer 7 KB

Monthly Cost €1/mo

adsagentclientafd-b7hqhjdrf3fpeqh2.b01.azurefd.net

Other

Optional

Execution 162ms

Transfer 60 KB

Unused 59%

Monthly Cost €1/mo

static.klaviyo.com

Other

Optional

Execution 142ms

Transfer 15 KB

Monthly Cost €1/mo

crossborder-integration.global-e.com

Other

Optional

Execution 119ms

Transfer 24 KB

Monthly Cost €1/mo

static.klaviyo.com

Other

Optional

Execution 116ms

Transfer 10 KB

Monthly Cost €1/mo

cdn.shopify.com

Other

Optional

Execution 98ms

Transfer 14 KB

Monthly Cost €1/mo

static.klaviyo.com

Other

Optional

Execution 94ms

Transfer 8 KB

Monthly Cost €0/mo

media.9gtb.com

Other

Optional

Execution 88ms

Transfer 62 KB

Unused 58%

Monthly Cost €0/mo

cdn-bundler.nice-team.net

Other

Optional

Execution 87ms

Transfer 29 KB

Monthly Cost €0/mo

static.klaviyo.com

Other

Optional

Execution 78ms

Transfer 26 KB

Monthly Cost €0/mo

js.klevu.com

Other

Optional

Execution 58ms

Transfer 7 KB

Monthly Cost €0/mo

widget.trustpilot.com

Other

Optional

Execution 53ms

Transfer 8 KB

Monthly Cost €0/mo

cdn.shopify.com

Other

Optional

Execution 50ms

Transfer 0 KB

Monthly Cost €0/mo

These scripts may cost more than they're worth

Microsoft Clarity adds 2002ms and costs ~€11/month
7ce243a1e1a2.cdn4.forter.com adds 1069ms and costs ~€6/month
js.klevu.com adds 567ms and costs ~€3/month
Google Tag Manager adds 382ms and costs ~€2/month
static.klaviyo.com adds 329ms and costs ~€2/month
js.klevu.com adds 284ms and costs ~€2/month
cdn-bundler.nice-team.net adds 214ms and costs ~€1/month
drakes.wilford.ai adds 203ms and costs ~€1/month
foursixty.com adds 202ms and costs ~€1/month

41% of JavaScript execution time comes from third-party scripts.

Why this matters

Third-party scripts (analytics, ads, social, A/B testing) often dominate execution time — every one is a perf-and-privacy tax.

Learn more ▾

Each third-party script is a black box: you don't control when it loads, what it executes, or how much it grows. They often account for a major share of total blocking time on average sites (HTTP Archive's Web Almanac documents the trend). Audit which ones you actually need, defer the rest, and use facade patterns (lite-youtube, lite-vimeo) for embedded media.

Source: web.dev / HTTP Archive Web Almanac

Microsoft Clarity takes 2002ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

7ce243a1e1a2.cdn4.forter.com takes 1069ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

js.klevu.com takes 567ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

57% of js.klevu.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

Google Tag Manager takes 382ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

static.klaviyo.com takes 329ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

79% of static.klaviyo.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

js.klevu.com takes 284ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

cdn-bundler.nice-team.net takes 214ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

65% of cdn-bundler.nice-team.net's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

drakes.wilford.ai takes 203ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

foursixty.com takes 202ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

59% of adsagentclientafd-b7hqhjdrf3fpeqh2.b01.azurefd.net's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

58% of media.9gtb.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

How third-party costs are calculated

Real-User Performance (CrUX)

Field metrics from the Chrome User Experience Report

INFO

Chrome User Experience (CrUX)

Real-user metrics from the Chrome UX Report (2026-09-20 — 2026-10-17)

LCP (p75)

1289 ms

93% good

INP (p75)

87 ms

96% good

CLS (p75)

0.000

99% good

FCP (p75)

1144 ms

TTFB (p75)

638 ms

This origin passes Core Web Vitals assessment

Image Optimization

25 images, 221 KB total, 0 KB wasted

INFO

Image Optimization Audit

Total Images

25

Total Size

221 KB

16 missing alt text 1 missing lazy loading

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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