Developer Tools

jscpd

Source: kucherenko/jscpd · ★ 5753 · TypeScript

Last updated 2026-06-11 · benchmark measured 2026-09-11 — deterministic & reproducible

Copy/paste duplicate code detector supporting 223+ languages, rewritten in Rust.

Are you the maker of jscpd? Claim this listing. It is free, takes a meta tag, a DNS record or GitHub admin rights, and never changes the score.

Launched something? Add your product, free.

To cite this score: legit.show/s/gh-kucherenko-jscpd/2026-09-11. That address never changes; this page moves with every re-measure.

Legit.Show scored jscpd 80/100 on 2026-09-11, measured across all 7 frames from its public surface. legit.show/s/gh-kucherenko-jscpd/2026-09-11

Is jscpd production-ready?

Legit.Show scores jscpd 80 out of 100 — the simple average of its 7 measured frames. Legit.Show ran its deterministic 7-Frame production-readiness benchmark on jscpd (public-surface assessment), measured from the public surface with no LLM in the scoring path. Its strongest frame is Security; its weakest is Privacy. Every frame it averages is published with its evidence on the Legit.Show listing.

The 7 Frames

• Performance — 56/100
• Accessibility — 93/100
• Security — 100/100
  How this compares across the catalogue: The Web Security Baseline
• Privacy — 25/100
  How this compares across the catalogue: The Privacy Gap
• Reliability — 100/100
• Standards — 86/100
• 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 — 150 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.
• Discoverable: structured data, sitemap, OpenGraph image, canonical URL.

Who built it

Andrey Kucherenko (@a_kucherenko)

Who it's for

Developers · DevOps engineers · Code quality teams · CI/CD pipelines · AI coding assistants

Sources and updates

Description

Taken from jscpd.dev's own website on 2026-06-11.

Operator

Andrey Kucherenko, as named in jscpd.dev's terms, privacy page or footer.

Code

github.com/kucherenko/jscpd.

Benchmark

Measured by Legit.Show from the live site, the way any visitor sees it — with no access to its code or accounts. Same method for every product, and no AI decides the score. Last checked 2026-09-11.

Put together from public information, without jscpd's involvement. If anything here is wrong, tell us and a person will check it.

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