Developer Tools
Screen Ruler
Last updated 2026-06-23 · benchmark measured 2026-08-09 — deterministic & reproducible
Chrome extension to inspect elements, measure distances, and extract CSS on any webpage.
83/100
Legit Benchmark — the simple average of 7 measured frames. Frames we could not measure are left out of the average, never counted as zero. Every frame is shown below with its evidence.
Is Screen Ruler production-ready?
Legit.Show scores Screen Ruler 83 out of 100 — the simple average of its 7 measured frames. Legit.Show ran its deterministic 7-Frame production-readiness benchmark on Screen Ruler (public-surface assessment), measured from the public surface with no LLM in the scoring path. Its strongest frame is Privacy; its weakest is Security. Every frame it averages is published with its evidence on the Legit.Show listing.
The 7 Frames
- Performance — 73/100
- Accessibility — 85/100
- Security — 45/100
- Privacy — 100/100
- Reliability — 92/100
- Standards — 89/100
- Discoverability — 100/100
What we measured
- Security headers present: HSTS.
- No Content-Security-Policy.
- Served over HTTPS with a valid certificate.
- Real Lighthouse performance run — 353 ms to first byte.
- Returns a proper 404 for unknown routes.
- 0 of 0 sampled routes reachable.
- Has a reachable privacy policy.
- Sets cookies / loads scripts with no consent prompt.
Who it's for
Developers · Designers · Design teams · Frontend engineers
Pricing
Free
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