Developer Tools
PeekCSS
Last updated 2026-08-16 · benchmark measured 2026-08-16 — deterministic & reproducible
A browser extension for inspecting CSS, colors, fonts, and assets on any webpage.
Is PeekCSS production-ready?
Legit.Show scores PeekCSS 74 out of 100 — the simple average of its 7 measured frames. Legit.Show ran its deterministic 7-Frame production-readiness benchmark on PeekCSS (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 — 95/100
- Security — 45/100
- Privacy — 25/100
- Reliability — 75/100
- Standards — 92/100
- Discoverability — 85/100
What we measured
- Security headers present: X-Content-Type-Options, Referrer-Policy.
- No Content-Security-Policy and no HSTS.
- Served over HTTPS with a valid certificate.
- Real Lighthouse performance run — 114 ms to first byte.
- 3 of 3 sampled routes reachable.
- No privacy policy found.
- Sets cookies / loads scripts with no consent prompt.
- Discoverable: sitemap, OpenGraph image, canonical URL.
Who it's for
Front-end developers · Designers · Freelancers · Web auditors
Pricing
Free (forever); Pro $1.67/mo ($20/yr); Ultimate $5/mo ($60/yr); Lifetime $59 one-time
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