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PDF.js
Last updated 2026-08-03 · benchmark measured 2026-08-03 — deterministic & reproducible
Open-source JavaScript library for parsing and rendering PDF files in browsers.
50/100
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 PDF.js production-ready?
Legit.Show scores PDF.js 50 out of 100 — the simple average of its 7 measured frames. Legit.Show ran its deterministic 7-Frame production-readiness benchmark on PDF.js (public-surface assessment), measured from the public surface with no LLM in the scoring path. Its strongest frame is Performance; its weakest is Discoverability. Every frame it averages is published with its evidence on the Legit.Show listing.
The 7 Frames
- Performance — 100/100
- Accessibility — 55/100
- Security — 45/100
- Privacy — 25/100
- Reliability — 47/100
- Standards — 64/100
- Discoverability — 15/100
What we measured
- Security headers present: CSP.
- No HSTS.
- Served over HTTPS with a valid certificate.
- Real Lighthouse performance run — 31 ms to first byte.
- Returns a proper 404 for unknown routes.
- 0 of 0 sampled routes reachable.
- No privacy policy found.
- Sets cookies / loads scripts with no consent prompt.
Who it's for
Web developers · JavaScript developers · PDF application builders