Developer Tools

Shazzer

Last updated 2026-08-19 · benchmark measured 2026-08-19 — deterministic & reproducible

Shazzer is a shared online fuzzing platform for browser security research.

Is Shazzer production-ready?

Legit.Show scores Shazzer 74 out of 100 — the simple average of its 7 measured frames. Legit.Show ran its deterministic 7-Frame production-readiness benchmark on Shazzer (public-surface assessment), measured from the public surface with no LLM in the scoring path. Its strongest frame is Reliability; its weakest is Privacy. Every frame it averages is published with its evidence on the Legit.Show listing.

The 7 Frames

• Performance — 94/100
• Accessibility — 91/100
• Security — 60/100
• Privacy — 25/100
• Reliability — 100/100
• Standards — 89/100
• Discoverability — 60/100

What we measured

• Security headers present: HSTS, X-Frame-Options.
• No Content-Security-Policy.
• Served over HTTPS with a valid certificate.
• Real Lighthouse performance run — 431 ms to first byte.
• Returns a proper 404 for unknown routes.
• 3 of 3 sampled routes reachable.
• No privacy policy found.
• Sets cookies / loads scripts with no consent prompt.

Who built it

Gareth Heyes (@garethheyes)

Who it's for

Security researchers · Web developers · Penetration testers · Browser security analysts

Visit Shazzer → · Alternatives to Shazzer → · How this was measured →