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Run a free scan
9 free tools

Check and optimize a site — no account.

Quick tools for performance, accessibility, assets and code. File tools run in your browser; URL tools send a public address to CometWeb for analysis.

Quick test

Run a quick test for a public URL.

Enter a public URL. See response time, page weight and basic quality signals.

Need a full analysis? Open the Insight audit →
Example
72

Quick test score: 72/100

Illustrative score based on response time, page weight and basic performance signals.

Sample result

After the test you’ll see response time, page weight and a score — preview below is illustrative.

186ms
TTFB
1.2MB
Weight

Enter Enter to run the test

Check a site
Performance auditor PageSpeed Insights or technical HTTP checks. Public URL analysis URL → Score Popular Contrast checker WCAG 2.2 contrast check + harmonic palette. Runs locally Colors → WCAG Popular Accessibility checklist 30 pre-launch WCAG 2.2 questions. Runs locally Site → Checklist NEW · Jul 2026 Responsive test Preview in 18 popular viewports. Public URL analysis URL → 18 viewports
Optimize assets
WebP / AVIF converter Batch conversion — the file never leaves your device. File stays on your device JPG · PNG → AVIF Popular Font converter TTF → WOFF2 with character subsetting. File stays on your device TTF → WOFF2 Favicon generator Full icon set + manifest.json. File stays on your device PNG → ICO set
Prepare code
Code minifier HTML, CSS, JS, SVG — locally in the browser. Runs locally Code → Minified JS obfuscator Makes code harder to read — does not protect secrets or credentials. Runs locally JS → Obfuscated NEW · Jul 2026

Full Insight audit

One tool shows one signal.
Insight builds the full fix plan.

Combine performance, SEO, accessibility, security and CO₂e in one audit with clear fix priorities.

Run a free Insight audit View a sample report
No credit card Report with date and sources Free account in the app