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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

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https://linuxmint.com

Performance

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

SCORE

91

GRADE

A

FIX

1

REVIEW

4

PASS

10

INFO

2

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

73

Performance

73

Accessibility

100

Best Practices

91

SEO

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

2.88 s

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

5.83 s

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

78 ms

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.

3.39 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.

6.01 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

17

10 PASS 4 REVIEW 1 FIX

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.

No Cache-Control header

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

C

Image Optimization

Action

15 images, 0 KB saveable

REVIEW

15 images, 0 KB saveable

https://linuxmint.com/web/img/logo.svg is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

https://linuxmint.com/web/img/logo-mono.svg is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

15 images 348 KB

0 oversized -0 KB

14 legacy format

2 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

C

JS Execution Cost

Action

1385ms total JS execution

REVIEW

1385ms total JS execution

https://linuxmint.com/: 482ms CPU time

Unattributable: 478ms CPU time

https://linuxmint.com/web/wizixo/template/assets/v...: 426ms CPU time

Third-party scripts: 478ms (35% of total)

Main Thread Breakdown

Style & Layout 34% Other 30% Script Evaluation 20% Parse HTML & CSS 9% Rendering 4% Script Parsing & Compilation 3%

Script	Total	Scripting	Parse/Compile	Party
https://linuxmint.com/	482ms	6ms	1ms	1st
Unattributable	478ms	11ms	0ms	3rd
https://linuxmint.com/web/wizixo/template/assets/vendor/jquery/jquery.min.js	426ms	253ms	14ms	1st

B

JS Bundles

7 scripts, 136 KB unused

REVIEW

7 scripts, 136 KB unused

https://linuxmint.com/web/wizixo/template/assets/v...: 50 KB unused (81%)

Consider code splitting or tree shaking to reduce unused code.

https://linuxmint.com/web/wizixo/template/assets/v...: 47 KB unused (79%)

Consider code splitting or tree shaking to reduce unused code.

https://linuxmint.com/web/wizixo/template/assets/v...: 39 KB unused (45%)

Consider code splitting or tree shaking to reduce unused code.

Total unused JavaScript: 136 KB

136 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://linuxmint.com/web/wizixo/template/assets/vendor/bootstrap/dist/js/bootstrap.min.js	62 KB	50 KB (81%)	✓	1st
https://linuxmint.com/web/wizixo/template/assets/vendor/fancybox/js/jquery.fancybox.min.js	61 KB	47 KB (79%)	✓	1st
https://linuxmint.com/web/wizixo/template/assets/vendor/jquery/jquery.min.js	88 KB	39 KB (45%)	✓	1st
https://linuxmint.com/web/wizixo/template/assets/vendor/popper.js/umd/popper.min.js	20 KB	—	✓	1st
https://linuxmint.com/web/wizixo/template/assets/vendor/jquery-easing/jquery.easing.min.js	3 KB	—	✓	1st
https://linuxmint.com/web/wizixo/template/assets/vendor/owlcarousel/js/owl.carousel.min.js	44 KB	—	✓	1st
https://linuxmint.com/web/wizixo/template/assets/js/functions.js	15 KB	—	✗	1st

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

C

Green Hosting

Action

Whether the site is served from green-energy infrastructure

REVIEW

Green Hosting

No green hosting detected

A

Page Weight Budget

1.0 MB transferred, 39 requests

PASS

1.0 MB transferred, 39 requests

Page weighs 1.5 MB (1.0 MB transferred)

Fonts are 302 KB — consider subsetting or using system fonts

Subset fonts to include only used characters, or switch to system font stacks.

Got: 302 KB

39 HTTP requests

Estimated 0.22 g CO2 per page load

1.0 MB transferred

39 requests

0.22 g CO2 per page load

Images 348.2 KiB 33%

Fonts 302.3 KiB 29%

JavaScript 292.2 KiB 28%

CSS 93.3 KiB 9%

Other 9.8 KiB 1%

HTML 8.6 KiB 1%

0 2.4 MB 4.9 MB

Under budget

Subset fonts to include only used characters, or switch to system font stacks.

Why this matters

Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).

Source: web.dev font loading

A+

Third-Party Impact

No third-party resources

PASS

No third-party resources

No third-party resources detected

No third-party resources detected — all resources are first-party.

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+

Font Loading

5 fonts (302 KB)

PASS

5 fonts (302 KB)

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

Web fonts

5

302 KB total

Render-blocking

0

of 5

Dominant font-display

swap

Most common across fonts

Font loading timeline

Transfer FOIT (block) FOUT (swap)

Poppins-Normal-500.woff2 woff2 swap

Size 8 KB

Load time 14 ms

Start 314 ms

Risk FOUT — text flashes from fallback to web font

themify.woff woff swap

Size 55 KB

Load time 25 ms

Start 315 ms

Risk FOUT — text flashes from fallback to web font

Convert to woff2 for ~30% smaller file size

PlayfairDisplay-Italic.... woff2 swap

Size 78 KB

Load time 24 ms

Start 316 ms

Risk FOUT — text flashes from fallback to web font

Poppins-Normal-600.woff2 woff2 swap

Size 8 KB

Load time 23 ms

Start 316 ms

Risk FOUT — text flashes from fallback to web font

fa-solid-900.woff2 woff2 swap

Size 153 KB

Load time 27 ms

Start 452 ms

Risk FOUT — text flashes from fallback to web font

Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need

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)

Fixing the unchecked items could save ~93 KB and ~186 ms

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

No optimization needed

PASS

No optimization needed

No resource hint issues

A+

Page Weight Inventory

39 resources · 1.0 MB · 136 KB savings available

PASS

39 resources · 1.0 MB · 136 KB savings available

Page weight 31 KB over 1MB target

Got: 1.0 MB Expected: ≤ 1 MB

~136 KB of savings available

1 third-party resources (0% of weight)

39 resources · 1.0 MiB · 1 third-party 30.5 KiB over 1MB target

Image 34% · 358.0 KiB

Font 29% · 302.3 KiB

JavaScript 28% · 292.2 KiB

CSS 9% · 93.3 KiB

Document 1% · 8.6 KiB

~136.4 KiB of savings available

Remove unused JavaScript: 136.4 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

39 resources			1.0 MiB

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

Network Waterfall

39 requests over 479ms

INFO

HTML JavaScript CSS Images Fonts XHR/Fetch Other

Third-Party Script Cost

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

INFO

35% of JavaScript execution is third-party

First-party Third-party 478ms · 0KB · $3/mo

Script	Category	Execution	Transfer	Unused	Monthly Cost	Verdict
Unattributable Unattributable	Other	478ms	0 KB	—	$3/mo	Costly

Unattributable

Other

Costly

Execution 478ms

Transfer 0 KB

Monthly Cost $3/mo

These scripts may cost more than they're worth

Unattributable adds 478ms and costs ~$3/month

Unattributable takes 478ms 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

How third-party costs are calculated

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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