Developer Tools
Modern CSS Radar
Last updated 2026-08-03 · benchmark checked 2026-08-09 · unchanged since 2026-08-08 — deterministic & reproducible
CSS Radar scans a public page to identify where modern CSS and HTML can replace custom code.
Is Modern CSS Radar production-ready?
Legit.Show scores Modern CSS Radar 94 out of 100 — the simple average of its 7 measured frames. Legit.Show ran its deterministic 7-Frame production-readiness benchmark on Modern CSS Radar (public-surface assessment), measured from the public surface with no LLM in the scoring path. Its strongest frame is Performance; its weakest is Privacy. Every frame it averages is published with its evidence on the Legit.Show listing.
The 7 Frames
- Performance — 100/100
- Accessibility — 96/100
- Security — 100/100
- Privacy — 70/100
- Reliability — 100/100
- Standards — 92/100
- Discoverability — 100/100
What we measured
- Security headers present: CSP, HSTS, X-Frame-Options, X-Content-Type-Options, Referrer-Policy.
- Served over HTTPS with a valid certificate.
- Real Lighthouse performance run — 1484 ms to first byte.
- Returns a proper 404 for unknown routes.
- 1 of 1 sampled routes reachable.
- Has a reachable privacy policy.
- Sets cookies / loads scripts with no consent prompt.
- Discoverable: structured data, sitemap, OpenGraph image, canonical URL.
Who it's for
Frontend teams · Designers · Developers · Indie makers
Visit Modern CSS Radar → · Alternatives to Modern CSS Radar → · How this was measured →