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https://smallpdf.com

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
79
GRADE
C
FIX
2
REVIEW
5
PASS
6
INFO
2

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

Mobile Desktop
87
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
98
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
100
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

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

598 ms

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

1.22 s

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

262 ms

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

0.006

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

645 ms

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

2.21 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
15
6 PASS 5 REVIEW 2 FIX
D
Third-Party Impact
Action
85% third-party, 0 ms blocking
FIX
85% third-party, 0 ms blocking
Warning::
Third-party code accounts for 85% of page weight (1002.2 KiB of 1.2 MiB)
Info::
Third-party blocking time is low (0 ms)
15%
85%
First-party Third-party
D
JS Bundles
Action
4 scripts, 308 KB unused
FIX
4 scripts, 308 KB unused
Warning::
https://s.smallpdf.com/static/landing-31c1aa5598d6...: 180 KB unused (47%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=AW-109...: 65 KB unused (46%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-DEQW...: 63 KB unused (38%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 308 KB
308 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://s.smallpdf.com/static/landing-31c1aa5598d6b4c0-entrypoint.js379 KB180 KB (47%)✓3rd
https://www.googletagmanager.com/gtag/js?id=AW-10944410766&cx=c&gtm=4e64m0h2143 KB65 KB (46%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-DEQWE69FLT169 KB63 KB (38%)✓3rd
https://s.smallpdf.com/static/track-js-ae7e76ba181a7222-entrypoint.js11 KB—✓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

B
Page Weight Budget
1.2 MB transferred, 38 requests
REVIEW
1.2 MB transferred, 38 requests
Info::
Page weighs 3.3 MB (1.2 MB transferred)
Warning::
JavaScript is 702 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 702 KB
Info::
38 HTTP requests
Info::
Estimated 0.24 g CO2 per page load
1.2 MB / 2.4 MB budget
1.2 MB transferred
38 requests
0.24 g CO2 per page load
JavaScript 702.0 KiB 59%
Fonts 147.3 KiB 12%
Images 146.5 KiB 12%
Other 101.5 KiB 9%
HTML 81.6 KiB 7%
Other 5.2 KiB 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Under 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

C
Image Optimization
Action
11 images, 0 KB saveable
REVIEW
11 images, 0 KB saveable
Warning::
https://s.smallpdf.com/static/752cb6ca40d99602.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://s.smallpdf.com/static/b68657960289ab68.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
11 images 146 KB
0 oversized -0 KB
10 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
1119ms total JS execution
REVIEW
1119ms total JS execution
Warning::
https://s.smallpdf.com/static/landing-31c1aa5598d6...: 420ms CPU time
Warning::
https://smallpdf.com/: 279ms CPU time
Info::
Unattributable: 208ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-DEQW...: 130ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=AW-109...: 82ms CPU time
Warning::
Third-party scripts: 840ms (75% of total)

Main Thread Breakdown

Script Evaluation 54% Other 17% Style & Layout 12% Script Parsing & Compilation 11%
ScriptTotalScriptingParse/CompileParty
https://s.smallpdf.com/static/landing-31c1aa5598d6b4c0-entrypoint.js420ms353ms61ms3rd
https://smallpdf.com/279ms22ms22ms1st
Unattributable208ms53ms0ms3rd
https://www.googletagmanager.com/gtag/js?id=G-DEQWE69FLT130ms105ms24ms3rd
https://www.googletagmanager.com/gtag/js?id=AW-10944410766&cx=c&gtm=4e64m0h282ms65ms16ms3rd
B
Page Weight Inventory
38 resources · 1.2 MB · 308 KB savings available
REVIEW
38 resources · 1.2 MB · 308 KB savings available
Warning::
Page weight 160 KB over 1MB target
Got: 1.2 MB Expected: ≤ 1 MB
Info::
~308 KB of savings available
Warning::
36 third-party resources (85% of weight)
Info::
1 resources over 200KB
38 resources · 1.2 MiB · 36 third-party 160.0 KiB over 1MB target
JavaScript 59% · 702.0 KiB
Image 21% · 247.9 KiB
Font 12% · 147.3 KiB
Document 7% · 81.6 KiB
Other 0% · 5.2 KiB

~308.4 KiB of savings available

Remove unused JavaScript: 308.4 KiB
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
Font Loading
2 fonts (147 KB)
PASS
2 fonts (147 KB)
Info::
2 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

2

147 KB total

Render-blocking

0

of 2

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s FCP 598 ms LCP 1.2 shttps://s.smallpdf.com/static/94d14575eec6442d.woff294d14575eec6442d.woff2 https://s.smallpdf.com/static/94d14575eec6442d.woff2 — 73.8 KiB — 22 ms — font-display: swaphttps://s.smallpdf.com/static/5121418e4f99b47c.woff25121418e4f99b47c.woff2 https://s.smallpdf.com/static/5121418e4f99b47c.woff2 — 73.5 KiB — 29 ms — font-display: swap
94d14575eec6442d.woff2 woff2 swap
Size 74 KB
Load time 22 ms
Start 155 ms
Risk FOUT — text flashes from fallback to web font
5121418e4f99b47c.woff2 woff2 swap
Size 74 KB
Load time 29 ms
Start 229 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+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
A+
HTTP Caching
max-age=300 (5 minutes)
PASS
max-age=300 (5 minutes)
Info::
Cache-Control header is set
Got: public, max-age=300, must-revalidate
Info::
Effective TTL: 5 minutes (max-age=300)
Info::
ETag present — enables conditional (304) responses
Cache-Control

public, max-age=300, must-revalidate

DirectiveValueMeaning
public—Any cache may store this response
max-age300Cache for 5 minutes
must-revalidate—Must recheck with server after expiry
Effective TTL: 300 seconds
Network Waterfall
38 requests over 2850ms
INFO
0 ms 500 ms 1.0 s 1.5 s 2.0 s 2.5 s FCP 598 ms LCP 1.2 shttps://smallpdf.com// https://smallpdf.com/ — 200 — 81.6 KiB — 41 ms — h2https://s.smallpdf.com/static/40d7d8365bc6e925.svgs.smallpdf.com/static/40d7d8365bc6e... https://s.smallpdf.com/static/40d7d8365bc6e925.svg — 200 — 1.3 KiB — 29 ms — h2https://s.smallpdf.com/static/bd7581cc63cf9d0b.svgs.smallpdf.com/static/bd7581cc63cf9... https://s.smallpdf.com/static/bd7581cc63cf9d0b.svg — 200 — 1.9 KiB — 31 ms — h2https://api.wordlift.io/data/https/smallpdf.com/api.wordlift.io/data/https/smallpdf... https://api.wordlift.io/data/https/smallpdf.com/ — 200 — 1.9 KiB — 37 ms — h2https://s.smallpdf.com/static/landing-31c1aa5598d6b4c0-entrypoint.jss.smallpdf.com/static/landing-31c1a... https://s.smallpdf.com/static/landing-31c1aa5598d6b4c0-entrypoint.js — 200 — 378.7 KiB — 39 ms — h2https://s.smallpdf.com/static/4f1cf8e8f9da22d9.svgs.smallpdf.com/static/4f1cf8e8f9da2... https://s.smallpdf.com/static/4f1cf8e8f9da22d9.svg — 200 — 1.1 KiB — 19 ms — h2https://s.smallpdf.com/static/94d14575eec6442d.woff2s.smallpdf.com/static/94d14575eec64... https://s.smallpdf.com/static/94d14575eec6442d.woff2 — 200 — 73.8 KiB — 22 ms — h3https://s.smallpdf.com/static/752cb6ca40d99602.svgs.smallpdf.com/static/752cb6ca40d99... https://s.smallpdf.com/static/752cb6ca40d99602.svg — 200 — 8.8 KiB — 17 ms — h3https://s.smallpdf.com/static/b68657960289ab68.svgs.smallpdf.com/static/b68657960289a... https://s.smallpdf.com/static/b68657960289ab68.svg — 200 — 85.2 KiB — 22 ms — h3https://s.smallpdf.com/static/1c236de72419904c.svgs.smallpdf.com/static/1c236de724199... https://s.smallpdf.com/static/1c236de72419904c.svg — 200 — 7.9 KiB — 29 ms — h3https://s.smallpdf.com/static/ef11cdb756ac0c94.svgs.smallpdf.com/static/ef11cdb756ac0... https://s.smallpdf.com/static/ef11cdb756ac0c94.svg — 200 — 12.2 KiB — 29 ms — h3https://s.smallpdf.com/static/e757d142d82020fc.svgs.smallpdf.com/static/e757d142d8202... https://s.smallpdf.com/static/e757d142d82020fc.svg — 200 — 6.7 KiB — 28 ms — h3https://s.smallpdf.com/static/52eca0e9f9095f05.svgs.smallpdf.com/static/52eca0e9f9095... https://s.smallpdf.com/static/52eca0e9f9095f05.svg — 200 — 21.1 KiB — 31 ms — h3https://s.smallpdf.com/static/5121418e4f99b47c.woff2s.smallpdf.com/static/5121418e4f99b... https://s.smallpdf.com/static/5121418e4f99b47c.woff2 — 200 — 73.5 KiB — 29 ms — h3data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7data:image/gif;base64,R0lGODlhAQABA... data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7 — 200 — 0 B — 0 ms — datahttps://pluto.smallpdf.com/timestamppluto.smallpdf.com/timestamp https://pluto.smallpdf.com/timestamp — 200 — 191 B — 58 ms — h2https://pro.smallpdf.com/geoippro.smallpdf.com/geoip https://pro.smallpdf.com/geoip — 200 — 272 B — 61 ms — h2https://www.googletagmanager.com/gtag/js?id=G-DEQWE69FLTwww.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-DEQWE69FLT — 200 — 169.3 KiB — 45 ms — h2https://s.smallpdf.com/static/track-js-ae7e76ba181a7222-entrypoint.jss.smallpdf.com/static/track-js-ae7e... https://s.smallpdf.com/static/track-js-ae7e76ba181a7222-entrypoint.js — 200 — 10.6 KiB — 8 ms — h3https://pluto.smallpdf.com/v1/local-token-cookiepluto.smallpdf.com/v1/local-token-c... https://pluto.smallpdf.com/v1/local-token-cookie — 200 — 283 B — 69 ms — h2https://pluto.smallpdf.com/v2/plutopluto.smallpdf.com/v2/pluto https://pluto.smallpdf.com/v2/pluto — 200 — 162 B — 27 ms — h2https://region1.google-analytics.com/g/collect?v=2&tid=G-DEQWE69FLT&gtm=45je64m0h2v9192177504za200zd9192177504&_p=1776897347839&gcs=G100&gcd=13p3pPp2p5l1&npa=1&dma_cps=-&dma=1&_eu=EAAAAGA&are=1&cid=1122028569.1776897349&frm=0&ir=1&pscdl=denied&rcb=16&sr=800x600&uaa=x86&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=&uamb=0&uap=macOS&uapv=10.15.7&uaw=0&ul=en-us&gaf=2&_s=1&tag_exp=0~115938466~115938468~117266400~117384405~117512542&dl=https%3A%2F%2Fsmallpdf.com%2F&dt=Smallpdf%20-%20A%20Free%20Solution%20to%20all%20your%20PDF%20Problems&sid=1776897348&sct=1&seg=0&en=page_view&_fv=1&_nsi=1&_ss=1&_ee=1&ep.store_gac=false&tfd=928region1.google-analytics.com/g/coll... https://region1.google-analytics.com/g/collect?v=2&tid=G-DEQWE69FLT&gtm=45je64m0h2v9192177504za200zd9192177504&_p=1776897347839&gcs=G100&gcd=13p3pPp2p5l1&npa=1&dma_cps=-&dma=1&_eu=EAAAAGA&are=1&cid=1122028569.1776897349&frm=0&ir=1&pscdl=denied&rcb=16&sr=800x600&uaa=x86&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=&uamb=0&uap=macOS&uapv=10.15.7&uaw=0&ul=en-us&gaf=2&_s=1&tag_exp=0~115938466~115938468~117266400~117384405~117512542&dl=https%3A%2F%2Fsmallpdf.com%2F&dt=Smallpdf%20-%20A%20Free%20Solution%20to%20all%20your%20PDF%20Problems&sid=1776897348&sct=1&seg=0&en=page_view&_fv=1&_nsi=1&_ss=1&_ee=1&ep.store_gac=false&tfd=928 — 204 — 547 B — 43 ms — h2https://www.googletagmanager.com/gtag/js?id=AW-10944410766&cx=c&gtm=4e64m0h2www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=AW-10944410766&cx=c&gtm=4e64m0h2 — 200 — 143.5 KiB — 23 ms — h2https://pro.smallpdf.com/v1/payments/recurly/plans?currency=EUR&country=NLpro.smallpdf.com/v1/payments/recurl... https://pro.smallpdf.com/v1/payments/recurly/plans?currency=EUR&country=NL — 204 — 0 B — 28 ms — h2https://pluto.smallpdf.com/v2/plutopluto.smallpdf.com/v2/pluto https://pluto.smallpdf.com/v2/pluto — 200 — 162 B — 27 ms — h2https://pro.smallpdf.com/v1/payments/recurly/plans?currency=EUR&country=NLpro.smallpdf.com/v1/payments/recurl... https://pro.smallpdf.com/v1/payments/recurly/plans?currency=EUR&country=NL — 200 — 431 B — 30 ms — h2https://pagead2.googlesyndication.com/ccm/collect?rcb=15&frm=0&en=page_view&dl=https%3A%2F%2Fsmallpdf.com%2F&scrsrc=www.googletagmanager.com&rnd=1254744733.1776897349&navt=n&npa=1&gtm=45be64k1h2v9188777980za200zb9192177504zd9192177504xec&gcs=G100&gcd=13p3p3p2p5l1&dma_cps=-&dma=1&tag_exp=0~115616986~115938466~115938469~117266400~117384405&apve=1&apvf=f&apvc=1&tids=AW-10944410766&tid=AW-10944410766&tft=1776897348779&tfd=1064pagead2.googlesyndication.com/ccm/c... https://pagead2.googlesyndication.com/ccm/collect?rcb=15&frm=0&en=page_view&dl=https%3A%2F%2Fsmallpdf.com%2F&scrsrc=www.googletagmanager.com&rnd=1254744733.1776897349&navt=n&npa=1&gtm=45be64k1h2v9188777980za200zb9192177504zd9192177504xec&gcs=G100&gcd=13p3p3p2p5l1&dma_cps=-&dma=1&tag_exp=0~115616986~115938466~115938469~117266400~117384405&apve=1&apvf=f&apvc=1&tids=AW-10944410766&tid=AW-10944410766&tft=1776897348779&tfd=1064 — 200 — 21 B — 31 ms — h3https://usage.trackjs.com/usage.gif?token=e077d0c6c2a0458181122426faed8af3&correlationId=245bcf77-1610-4ff6-9707-fd51976bb071&application=smallpdf&x=f6330dc7-f36c-4b70-a00b-9ea208fd747a&usage.trackjs.com/usage.gif?token=e... https://usage.trackjs.com/usage.gif?token=e077d0c6c2a0458181122426faed8af3&correlationId=245bcf77-1610-4ff6-9707-fd51976bb071&application=smallpdf&x=f6330dc7-f36c-4b70-a00b-9ea208fd747a& — 200 — 273 B — 298 ms — http/1.1https://pluto.smallpdf.com/v2/plutopluto.smallpdf.com/v2/pluto https://pluto.smallpdf.com/v2/pluto — 200 — 162 B — 28 ms — h2https://s.smallpdf.com/static/874e8fae7f2a5b03.svgs.smallpdf.com/static/874e8fae7f2a5... https://s.smallpdf.com/static/874e8fae7f2a5b03.svg — 200 — 1.3 KiB — 9 ms — h3
0 ms 500 ms 1.0 s 1.5 s 2.0 s 2.5 s FCP 598 ms LCP 1.2 shttps://smallpdf.com// https://smallpdf.com/ — 200 — 81.6 KiB — 41 ms — h2https://s.smallpdf.com/static/40d7d8365bc6e925.svgs.smallpdf.com/static/40d7d8365bc6e... https://s.smallpdf.com/static/40d7d8365bc6e925.svg — 200 — 1.3 KiB — 29 ms — h2https://s.smallpdf.com/static/bd7581cc63cf9d0b.svgs.smallpdf.com/static/bd7581cc63cf9... https://s.smallpdf.com/static/bd7581cc63cf9d0b.svg — 200 — 1.9 KiB — 31 ms — h2https://api.wordlift.io/data/https/smallpdf.com/api.wordlift.io/data/https/smallpdf... https://api.wordlift.io/data/https/smallpdf.com/ — 200 — 1.9 KiB — 37 ms — h2https://s.smallpdf.com/static/landing-31c1aa5598d6b4c0-entrypoint.jss.smallpdf.com/static/landing-31c1a... https://s.smallpdf.com/static/landing-31c1aa5598d6b4c0-entrypoint.js — 200 — 378.7 KiB — 39 ms — h2https://s.smallpdf.com/static/4f1cf8e8f9da22d9.svgs.smallpdf.com/static/4f1cf8e8f9da2... https://s.smallpdf.com/static/4f1cf8e8f9da22d9.svg — 200 — 1.1 KiB — 19 ms 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HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
75% of JavaScript execution is third-party
First-party Third-party 840ms · 691KB · €13/mo
s.smallpdf.com
Other
Costly
Execution 420ms
Transfer 379 KB
Unused 47%
Monthly Cost €7/mo
Unattributable
Other
Costly
Execution 208ms
Transfer 0 KB
Monthly Cost €3/mo
Google Tag Manager
Tag Manager
Optional
Execution 130ms
Transfer 169 KB
Unused 38%
Monthly Cost €2/mo
Google Tag Manager
Tag Manager
Optional
Execution 82ms
Transfer 143 KB
Unused 46%
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • s.smallpdf.com adds 420ms and costs ~€7/month
  • Unattributable adds 208ms and costs ~€3/month

75% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

When third-party JS execution time exceeds your own, performance gains from frontend work are capped by code you don't own.

Learn more ▾

Every millisecond of third-party JS competes with your own for main-thread time. If their share is bigger than yours, optimization on your code base barely moves the needle. Audit, defer, or remove third-parties before further frontend optimization. Use Lighthouse's third-party audit to identify the worst offenders.

Source: web.dev

s.smallpdf.com takes 420ms 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

Unattributable takes 208ms 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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