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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

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https://minimaxh3.art

Performance

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

SCORE

94

GRADE

A

FIX

1

REVIEW

2

PASS

16

INFO

2

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

81

Performance

87

Accessibility

96

Best Practices

100

SEO

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

1.87 s

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

1.96 s

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

0 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.018

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

1.87 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.

1.96 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

21

16 PASS 2 REVIEW 1 FIX

D

HTTP Caching

Action

no-store (uncacheable)

FIX

no-store (uncacheable)

Cache-Control: no-store prevents all caching

Intentional for dynamic content, but increases server load for every page view.

Got: no-store, must-revalidate

No ETag or Last-Modified header

Conditional requests (304 Not Modified) are not possible without validators.

Cache-Control

no-store, must-revalidate

Directive	Value	Meaning
no-store	—	Never cache this response
must-revalidate	—	Must recheck with server after expiry

C

Image Optimization

Action

15 images, 0 KB saveable

REVIEW

15 images, 0 KB saveable

https://img.turbo0.com/badge-listed-light.svg is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

https://www.toolpilot.ai/cdn/shop/files/f-b_690x15... is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

https://navfolders.com/badge/nav_dark.svg is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

https://firstlook.tools/badge/badge_dark.svg is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

https://deeplaunch.io/badge/badge_dark.svg is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

https://www.freeai.run/badge/badge_dark.svg is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

https://tooldirs.com/badge/badge_dark.svg is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

https://minimaxh3.art/logo.png is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

https://startupfa.st/images/badges/powered-by-ligh... is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

https://toolrain.com/badges/badge-listed-light.svg is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

15 images 2 KB

0 oversized -0 KB

5 legacy format

10 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

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

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

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

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

Green Hosting

Action

Whether the site is served from green-energy infrastructure

REVIEW

Green Hosting

No green hosting detected

A+

Page Weight Budget

111 KB transferred, 72 requests

PASS

111 KB transferred, 72 requests

Page weighs 290 KB (111 KB transferred)

72 HTTP requests

Estimated 0.02 g CO2 per page load

111 KB transferred

72 requests

0.02 g CO2 per page load

JavaScript 56.6 KiB 51%

HTML 44.3 KiB 40%

Fonts 5.4 KiB 5%

Images 2.1 KiB 2%

CSS 969 B 1%

Other 883 B 1%

Other 461 B 0%

Other 430 B 0%

Other 415 B 0%

0 2.4 MB 4.9 MB

Under budget

A+

Third-Party Impact

10% third-party, 0 ms blocking

PASS

10% third-party, 0 ms blocking

Third-party code accounts for 10% of page weight (11.3 KiB of 111.5 KiB)

Third-party blocking time is low (0 ms)

90%

First-party Third-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+

JS Execution Cost

293ms total JS execution

PASS

293ms total JS execution

Unattributable: 150ms CPU time

https://minimaxh3.art/: 143ms CPU time

Main Thread Breakdown

Other 54% Style & Layout 19% Script Evaluation 10% Rendering 7% Parse HTML & CSS 6% Script Parsing & Compilation 4%

Script	Total	Scripting	Parse/Compile	Party
Unattributable	150ms	4ms	0ms	1st
https://minimaxh3.art/	143ms	16ms	12ms	1st

A+

Font Loading

10 fonts (5 KB)

PASS

10 fonts (5 KB)

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

Web fonts

10

5 KB total

Render-blocking

0

of 10

Dominant font-display

swap

Most common across fonts

Font loading timeline

Transfer FOIT (block) FOUT (swap)

syne-bd7099ad.woff2 woff2 swap

Size 1 KB

Load time 542 ms

Start 847 ms

Risk FOUT — text flashes from fallback to web font

syne-f2eba987.woff2 woff2 swap

Size 1 KB

Load time 545 ms

Start 848 ms

Risk FOUT — text flashes from fallback to web font

syne-c37e2fa5.woff2 woff2 swap

Size 1 KB

Load time 580 ms

Start 848 ms

Risk FOUT — text flashes from fallback to web font

outfit-f37fa50e.woff2 woff2 swap

Size 1 KB

Load time 572 ms

Start 848 ms

Risk FOUT — text flashes from fallback to web font

outfit-c8e7a734.woff2 woff2 swap

Size 1 KB

Load time 246 ms

Start 849 ms

Risk FOUT — text flashes from fallback to web font

outfit-c8e7a734.woff2 woff2 swap

Size 1 KB

Load time 144 ms

Start 1.3 s

Risk FOUT — text flashes from fallback to web font

syne-bd7099ad.woff2 woff2 swap

Size 1 KB

Load time 52 ms

Start 1.6 s

Risk FOUT — text flashes from fallback to web font

syne-f2eba987.woff2 woff2 swap

Size 1 KB

Load time 32 ms

Start 1.6 s

Risk FOUT — text flashes from fallback to web font

syne-c37e2fa5.woff2 woff2 swap

Size 1 KB

Load time 43 ms

Start 1.6 s

Risk FOUT — text flashes from fallback to web font

outfit-f37fa50e.woff2 woff2 swap

Size 1 KB

Load time 40 ms

Start 1.6 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+

JS Bundles

49 scripts, 0 KB unused

PASS

49 scripts, 0 KB unused

0 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://minimaxh3.art/assets/global-error-CVl8f3Cz.js	1 KB	—	✓	1st
https://minimaxh3.art/assets/framework-DJH1pfSr.js	1 KB	—	✓	1st
https://minimaxh3.art/assets/rolldown-runtime-QTnfLwEv.js	1 KB	—	✓	1st
https://minimaxh3.art/assets/url-utils-BQKFb685.js	1 KB	—	✓	1st
https://minimaxh3.art/assets/error-BaA-s6Ye.js	1 KB	—	✓	1st
https://minimaxh3.art/assets/navigation-Ciu8tt4_.js	1 KB	—	✓	1st
https://minimaxh3.art/assets/react-DlbkFqaW.js	1 KB	—	✓	1st
https://minimaxh3.art/assets/BaseLink-CcKqeeVV.js	1 KB	—	✓	1st
https://minimaxh3.art/assets/locale-04Q9vBFA.js	1 KB	—	✓	1st
https://minimaxh3.art/assets/react-client-CAjdHkmk.js	1 KB	—	✓	1st

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+

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+

Compression Algorithm

Main response uses brotli

PASS

Main 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+

Main HTML Cache-Control

Main HTML uses no-store -- correct for sensitive/dynamic content

PASS

Main HTML uses no-store -- correct for sensitive/dynamic content

Main HTML uses no-store -- correct for sensitive/dynamic content

Got: no-store, must-revalidate

A+

Server-Timing Observability

3 Server-Timing entries advertised

PASS

3 Server-Timing entries advertised

Server-Timing header advertises 3 timing entries

A+

Server Response Intelligence

2 server-response signal(s) detected

PASS

2 server-response signal(s) detected

`Vary` header declared: RSC, Accept, Next-Router-State-Tree, Next-Router-Prefetch, Next-Router-Segment-P...

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).

No `ETag` or `Last-Modified` -- conditional GET not supported

Without either header, browsers can't issue conditional GETs and refresh always re-downloads the full response body even when nothing changed. Add `ETag: "<hash>"` (or `Last-Modified: <date>`) on cacheable responses; the server returns 304 Not Modified when the client's cached copy is still valid, saving bandwidth.

A+

Page Weight Inventory

72 resources · 111 KB · 0 KB savings available

PASS

72 resources · 111 KB · 0 KB savings available

Within 1MB page-weight target

Got: 111 KB

2 third-party resources (10% of weight)

72 resources · 111.5 KiB · 2 third-party Within 1MB page-weight target

JavaScript 51% · 56.6 KiB

Document 40% · 44.3 KiB

Font 5% · 5.4 KiB

Image 2% · 2.1 KiB

Other 2% · 1.7 KiB

CSS 1% · 969 B

Media 0% · 430 B

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

72 resources			111.5 KiB

Network Waterfall

72 requests over 1903ms

INFO

HTML JavaScript CSS Images Fonts XHR/Fetch Other

Image Optimization

22 images, 1 KB total, 0 KB wasted

INFO

Image Optimization Audit

Total Images

22

Total Size

1 KB

17 missing dimensions 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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