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https://imgbb.com

Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
91
GRADE
A
FIX
2
REVIEW
1
PASS
10
INFO
1

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

Mobile Desktop
81
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
83
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
81
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
91
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.

1.92 s

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

1.92 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.

0.016

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

1.99 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.

1.92 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
14
10 PASS 1 REVIEW 2 FIX
D
Third-Party Impact
Action
95% third-party, 0 ms blocking
FIX
95% third-party, 0 ms blocking
Warning::
Third-party code accounts for 95% of page weight (179.9 KiB of 189.6 KiB)
Info::
Third-party blocking time is low (0 ms)
95%
First-party Third-party
D
HTTP Caching
Action
no-store (uncacheable)
FIX
no-store (uncacheable)
Info::
Cache-Control: no-store prevents all caching
Intentional for dynamic content, but increases server load for every page view.
Got: no-store, no-cache, must-revalidate
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

no-store, no-cache, must-revalidate

DirectiveValueMeaning
no-store—Never cache this response
no-cache—Cache but always revalidate first
must-revalidate—Must recheck with server after expiry
B
JS Bundles
2 scripts, 67 KB unused
REVIEW
2 scripts, 67 KB unused
Warning::
https://simgbb.com/8179/ibb.js: 46 KB unused (80%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://simgbb.com/8179/jquery2.js: 21 KB unused (53%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 67 KB
67 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://simgbb.com/8179/ibb.js57 KB46 KB (80%)✓3rd
https://simgbb.com/8179/jquery2.js40 KB21 KB (53%)✓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

A+
Page Weight Budget
190 KB transferred, 10 requests
PASS
190 KB transferred, 10 requests
Info::
Page weighs 556 KB (190 KB transferred)
Info::
10 HTTP requests
Info::
Estimated 0.04 g CO2 per page load
190 KB / 2.4 MB budget
190 KB transferred
10 requests
0.04 g CO2 per page load
JavaScript 97.3 KiB 51%
Fonts 50.5 KiB 27%
CSS 23.7 KiB 12%
HTML 9.7 KiB 5%
Other 7.3 KiB 4%
Images 1.1 KiB 1%
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+
Image Optimization
1 images, 0 KB saveable
PASS
1 images, 0 KB saveable
Info::
All images are well-optimized
1 images 1 KB
0 oversized -0 KB
1 legacy format
0 missing dimensions CLS risk
A+
JS Execution Cost
80ms total JS execution
PASS
80ms total JS execution
Info::
https://imgbb.com/: 80ms CPU time

Main Thread Breakdown

Style & Layout 32% Script Evaluation 28% Other 26% Script Parsing & Compilation 7% Parse HTML & CSS 5%
ScriptTotalScriptingParse/CompileParty
https://imgbb.com/80ms11ms1ms1st
A+
Font Loading
2 fonts (50 KB)
PASS
2 fonts (50 KB)
Info::
2 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

2

51 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 1.5 s 2.0 s FCP 1.9 s LCP 1.9 shttps://simgbb.com/fonts/imgbb.woff2imgbb.woff2 https://simgbb.com/fonts/imgbb.woff2 — 8.5 KiB — 667 ms — font-display: swaphttps://fonts.gstatic.com/s/opensans/v44/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu0SC55I.woff2memvYaGs126MiZpBA-UvWbX... https://fonts.gstatic.com/s/opensans/v44/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu0SC55I.woff2 — 42.0 KiB — 7 ms — font-display: swap
imgbb.woff2 woff2 swap
Size 9 KB
Load time 667 ms
Start 1.6 s
Risk FOUT — text flashes from fallback to web font
memvYaGs126MiZpBA-UvWbX... woff2 swap
Size 42 KB
Load time 7 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+
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
10 resources · 190 KB · 67 KB savings available
PASS
10 resources · 190 KB · 67 KB savings available
Info::
Within 1MB page-weight target
Got: 190 KB
Info::
~67 KB of savings available
Warning::
9 third-party resources (95% of weight)
10 resources · 189.6 KiB · 9 third-party Within 1MB page-weight target
JavaScript 51% · 97.3 KiB
Font 27% · 50.5 KiB
CSS 12% · 23.7 KiB
Document 5% · 9.7 KiB
Image 4% · 8.4 KiB

~67.0 KiB of savings available

Remove unused JavaScript: 67.0 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: OVHcloud

Network Waterfall
10 requests over 2489ms
INFO
0 ms 500 ms 1.0 s 1.5 s 2.0 s 2.5 s FCP 1.9 s LCP 1.9 shttps://imgbb.com// https://imgbb.com/ — 200 — 9.7 KiB — 663 ms — h2https://fonts.googleapis.com/css2?family=Open+Sans:wght@300;400;500&display=swapfonts.googleapis.com/css2?family=Op... https://fonts.googleapis.com/css2?family=Open+Sans:wght@300;400;500&display=swap — 200 — 2.2 KiB — 120 ms — h2https://simgbb.com/8179/ibb.csssimgbb.com/8179/ibb.css https://simgbb.com/8179/ibb.css — 200 — 21.5 KiB — 870 ms — h2https://simgbb.com/images/logo.pngsimgbb.com/images/logo.png https://simgbb.com/images/logo.png — 200 — 1.1 KiB — 714 ms — h2https://simgbb.com/8179/jquery2.jssimgbb.com/8179/jquery2.js https://simgbb.com/8179/jquery2.js — 200 — 39.9 KiB — 374 ms — h2https://simgbb.com/8179/ibb.jssimgbb.com/8179/ibb.js https://simgbb.com/8179/ibb.js — 200 — 57.4 KiB — 577 ms — h2https://simgbb.com/fonts/imgbb.woff2simgbb.com/fonts/imgbb.woff2 https://simgbb.com/fonts/imgbb.woff2 — 200 — 8.5 KiB — 667 ms — h2https://fonts.gstatic.com/s/opensans/v44/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu0SC55I.woff2fonts.gstatic.com/s/opensans/v44/me... https://fonts.gstatic.com/s/opensans/v44/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu0SC55I.woff2 — 200 — 42.0 KiB — 7 ms — h3https://simgbb.com/images/favicon.pngsimgbb.com/images/favicon.png https://simgbb.com/images/favicon.png — 200 — 7.3 KiB — 231 ms — h2https://simgbb.com/images/favicon.pngsimgbb.com/images/favicon.png https://simgbb.com/images/favicon.png — 200 — 0 B — 2 ms — h2
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.

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