Skip to content
https://filezilla-project.org

Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
98
GRADE
A+
FIX
2
REVIEW
1
PASS
10
INFO
1

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

Mobile Desktop
100
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
90
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
96
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.

212 ms

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

673 ms

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.

0.000

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

239 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.

673 ms

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
14
10 PASS 1 REVIEW 2 FIX
D
Third-Party Impact
Action
71% third-party, 0 ms blocking
FIX
71% third-party, 0 ms blocking
Warning::
Third-party code accounts for 71% of page weight (102.0 KiB of 144.3 KiB)
Info::
Third-party blocking time is low (0 ms)
29%
71%
First-party Third-party
F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
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.

B
Image Optimization
11 images, 0 KB saveable
REVIEW
11 images, 0 KB saveable
Info::
All images are well-optimized
11 images 59 KB
0 oversized -0 KB
10 legacy format
0 missing dimensions CLS risk
A+
Page Weight Budget
144 KB transferred, 15 requests
PASS
144 KB transferred, 15 requests
Info::
Page weighs 223 KB (144 KB transferred)
Info::
15 HTTP requests
Info::
Estimated 0.03 g CO2 per page load
144 KB / 2.4 MB budget
144 KB transferred
15 requests
0.03 g CO2 per page load
Other 68.5 KiB 47%
Images 59.4 KiB 41%
HTML 7.3 KiB 5%
Other 6.7 KiB 5%
CSS 2.5 KiB 2%
0 2.4 MB 4.9 MB
Under budget
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+
JS Execution Cost
53ms total JS execution
PASS
53ms total JS execution
Info::
https://filezilla-project.org/: 53ms CPU time

Main Thread Breakdown

Other 47% Style & Layout 31% Script Evaluation 11% Rendering 8%
ScriptTotalScriptingParse/CompileParty
https://filezilla-project.org/53ms7ms1ms1st
A+
Font Loading
No web fonts (system fonts)
PASS
No web fonts (system fonts)
Info::
No web fonts loaded — system fonts are fastest
No web fonts loaded — system fonts are optimal.
A+
JS Bundles
No JavaScript
PASS
No JavaScript
Info::
No JavaScript bundles
No JavaScript files loaded.
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
Page Weight Inventory
15 resources · 144 KB · 0 KB savings available
PASS
15 resources · 144 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 144 KB
Warning::
3 third-party resources (71% of weight)
15 resources · 144.3 KiB · 3 third-party Within 1MB page-weight target
Image 93% · 134.5 KiB
Document 5% · 7.3 KiB
CSS 2% · 2.5 KiB
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Hetzner Online GmbH

Network Waterfall
15 requests over 726ms
INFO
0 ms 200 ms 400 ms 600 ms FCP 212 ms LCP 673 mshttps://filezilla-project.org// https://filezilla-project.org/ — 200 — 7.3 KiB — 107 ms — h2https://filezilla-project.org/style.css?v=13/style.css?v=13 https://filezilla-project.org/style.css?v=13 — 200 — 2.5 KiB — 34 ms — h2https://filezilla-project.org/images/sponsors/route4me.png/images/sponsors/route4me.png https://filezilla-project.org/images/sponsors/route4me.png — 200 — 2.3 KiB — 33 ms — h2https://ads.filezilla-project.org/images/leaderboards/remotedrive.pngads.filezilla-project.org/images/le... https://ads.filezilla-project.org/images/leaderboards/remotedrive.png — 200 — 33.5 KiB — 166 ms — h2https://filezilla-project.org/images/sponsors/automatio.png/images/sponsors/automatio.png https://filezilla-project.org/images/sponsors/automatio.png — 200 — 1.1 KiB — 33 ms — h2https://filezilla-project.org/images/sponsors/ndchost.png/images/sponsors/ndchost.png https://filezilla-project.org/images/sponsors/ndchost.png — 200 — 757 B — 34 ms — h2https://filezilla-project.org/images/s_header_bottom.png/images/s_header_bottom.png https://filezilla-project.org/images/s_header_bottom.png — 200 — 1.3 KiB — 34 ms — h2https://filezilla-project.org/images/s_common.png/images/s_common.png https://filezilla-project.org/images/s_common.png — 200 — 15.7 KiB — 34 ms — h2https://filezilla-project.org/images/atomfeed.png/images/atomfeed.png https://filezilla-project.org/images/atomfeed.png — 200 — 1.1 KiB — 34 ms — h2https://filezilla-project.org/images/h3.png/images/h3.png https://filezilla-project.org/images/h3.png — 200 — 1.0 KiB — 34 ms — h2https://filezilla-project.org/images/button.png/images/button.png https://filezilla-project.org/images/button.png — 200 — 1.8 KiB — 35 ms — h2https://filezilla-project.org/images/li.png/images/li.png https://filezilla-project.org/images/li.png — 200 — 822 B — 37 ms — h2https://ads.filezilla-project.org/rightad.phpads.filezilla-project.org/rightad.p... https://ads.filezilla-project.org/rightad.php — 200 — 68.5 KiB — 527 ms — h2https://filezilla-project.org/favicon.ico/favicon.ico https://filezilla-project.org/favicon.ico — 200 — 6.7 KiB — 32 ms — h2blob:https://filezilla-project.org/afca716c-7522-49a8-afa1-aee82b65d70efilezilla-project.org/afca716c-7522... blob:https://filezilla-project.org/afca716c-7522-49a8-afa1-aee82b65d70e — 200 — 0 B — 1 ms — blob
HTML JavaScript CSS Images Fonts XHR/Fetch Other
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

Send Feedback