Performance

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

SCORE

GRADE

FIX

REVIEW

PASS

INFO

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

Mobile Desktop

Performance

Accessibility

100

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.

1.20 s

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

3.36 s

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

70 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.

1.20 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.

3.37 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

19 PASS 4 REVIEW

Image Optimization

8 images, 0 KB saveable

REVIEW

8 images, 0 KB saveable

All images are well-optimized

8 images 530 KB

0 oversized -0 KB

4 legacy format

0 missing dimensions CLS risk

JS Execution Cost

Action

1022ms total JS execution

REVIEW

1022ms total JS execution

https://pdftomd.tools/: 484ms CPU time

Unattributable: 227ms CPU time

https://pdftomd.tools/_next/static/chunks/7464-84d...: 181ms CPU time

https://pdftomd.tools/_next/static/chunks/webpack-...: 130ms CPU time

Main Thread Breakdown

Style & Layout 34% Script Evaluation 30% Other 23% Rendering 5% Script Parsing & Compilation 5%

Script	Total	Scripting	Parse/Compile	Party
https://pdftomd.tools/	484ms	11ms	10ms	1st
Unattributable	227ms	12ms	0ms	1st
https://pdftomd.tools/_next/static/chunks/7464-84d091228af369e1.js	181ms	142ms	16ms	1st
https://pdftomd.tools/_next/static/chunks/webpack-51ab158012a5aa95.js	130ms	129ms	1ms	1st

Main HTML Cache-Control

Action

Main HTML max-age=14400 (~240min) is aggressive

REVIEW

Main HTML max-age=14400 (~240min) is aggressive

Main HTML cached for 240 minutes -- risks stale auth / SPA state

Long max-age on the main HTML document means users may see outdated auth state, SPA shells, or A/B variants until the cache expires. Consider Cache-Control: no-cache (or max-age=300) for HTML and let your hashed assets (JS/CSS/images) carry the long cache instead.

Got: public, max-age=14400, s-maxage=3600

Server-Timing Observability

No Server-Timing header found

REVIEW

No Server-Timing header found

Server-Timing exposes backend timing breakdowns to browser DevTools (e.g., `db: 45ms; render: 120ms; cache: 2ms`). Useful for diagnosing slow pages without backend log access. Most modern frameworks (Next.js, Cloudflare Workers, Fastly) emit it automatically; absence on a managed platform usually means telemetry headers are stripped at the edge.

Page Weight Budget

807 KB transferred, 48 requests

PASS

807 KB transferred, 48 requests

Page weighs 1.3 MB (807 KB transferred)

48 HTTP requests

Estimated 0.17 g CO2 per page load

807 KB transferred

48 requests

0.17 g CO2 per page load

Images 530.4 KiB 66%

JavaScript 148.7 KiB 18%

Fonts 72.0 KiB 9%

HTML 20.6 KiB 3%

CSS 18.0 KiB 2%

Other 9.0 KiB 1%

Other 7.1 KiB 1%

Other 867 B 0%

Other 0 B 0%

0 2.4 MB 4.9 MB

Under budget

A+

Third-Party Impact

1% third-party, 0 ms blocking

PASS

1% third-party, 0 ms blocking

Third-party code accounts for 1% of page weight (4.1 KiB of 806.6 KiB)

Third-party blocking time is low (0 ms)

99%

First-party Third-party

A+

Text Compression

All text resources are compressed

PASS

All text resources are compressed

All text resources are properly compressed.

A+

Font Loading

2 fonts (72 KB)

PASS

2 fonts (72 KB)

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

Web fonts

72 KB total

Render-blocking

of 2

Dominant font-display

swap

Most common across fonts

Font loading timeline

Transfer FOIT (block) FOUT (swap)

4c9affa5bc8f420e-s.p.woff2 woff2 swap

Size 24 KB

Load time 57 ms

Start 90 ms

Risk FOUT — text flashes from fallback to web font

e4af272ccee01ff0-s.p.woff2 woff2 swap

Size 48 KB

Load time 41 ms

Start 91 ms

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

12 scripts, 0 KB unused

PASS

12 scripts, 0 KB unused

0 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://pdftomd.tools/boot.js?v=85f3080a1e	1 KB	—	✓	1st
https://pdftomd.tools/_next/static/chunks/webpack-51ab158012a5aa95.js	3 KB	—	✓	1st
https://pdftomd.tools/_next/static/chunks/6cc56f88-49f72feb05e60677.js	55 KB	—	✓	1st
https://pdftomd.tools/_next/static/chunks/7464-84d091228af369e1.js	46 KB	—	✓	1st
https://pdftomd.tools/_next/static/chunks/main-app-6ef64760b40314f2.js	1 KB	—	✓	1st
https://pdftomd.tools/_next/static/chunks/110-5ce26364433cbc22.js	9 KB	—	✓	1st
https://pdftomd.tools/_next/static/chunks/1188-6f82dc53bf9fde42.js	10 KB	—	✓	1st
https://pdftomd.tools/_next/static/chunks/3326-ddc27d648466a11d.js	16 KB	—	✓	1st
https://pdftomd.tools/_next/static/chunks/app/(en)/page-2d33af555ba9e51d.js	1 KB	—	✓	1st
https://pdftomd.tools/_next/static/chunks/4092-8aebca205f4e8252.js	4 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

4 hints, 0 missing preconnects

PASS

4 hints, 0 missing preconnects

Page uses 4 resource hint(s)

Current Resource Hints

preconnect

—

preload

dns-prefetch

—

prefetch

—

4 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 Response Intelligence

2 server-response signal(s) detected

PASS

2 server-response signal(s) detected

`Vary` header declared: rsc, next-router-state-tree, next-router-prefetch, next-router-segment-prefetch

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

48 resources · 807 KB · 0 KB savings available

PASS

48 resources · 807 KB · 0 KB savings available

Within 1MB page-weight target

Got: 807 KB

22 third-party resources (1% of weight)

48 resources · 806.6 KiB · 22 third-party Within 1MB page-weight target

Image 67% · 537.5 KiB

JavaScript 18% · 148.7 KiB

Font 9% · 72.0 KiB

Document 3% · 20.6 KiB

CSS 2% · 18.0 KiB

Other 1% · 9.8 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

48 resources			806.6 KiB

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

JavaScript Blocking

1 JS blocking issue(s) detected

PASS

1 JS blocking issue(s) detected

2 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.

A+

CSS Performance Depth

No CSS performance depth issues detected

PASS

No CSS performance depth issues detected

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

A+

HTTP Caching

max-age=14400 (4 hours)

PASS

max-age=14400 (4 hours)

Cache-Control header is set

Got: public, max-age=14400, s-maxage=3600

Effective TTL: 4 hours (max-age=14400)

CDN TTL: 1 hour (s-maxage=3600)

No ETag or Last-Modified header

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

Cache-Control

public, max-age=14400, s-maxage=3600

Directive	Value	Meaning
public	—	Any cache may store this response
max-age	14400	Cache for 4 hours
s-maxage	3600	CDN caches for 1 hour

Effective TTL: 14400 seconds

Asset Compression

No text asset hosts to measure

INFO

No text asset hosts to measure

No third-party or subdomain host served enough text assets to measure

Asset compression is measured per host, from one HEAD request against a sampled resource. Pages that serve all their JS and CSS from the document's own origin are covered by the document compression check instead.

Network Waterfall

48 requests over 1184ms

INFO

HTML JavaScript CSS Images Fonts XHR/Fetch Other

Image Optimization

13 images, 113 KB total, 0 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

113 KB

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.