Developer Tools

EPUB Fixer

Last updated 2026-07-10 · benchmark measured 2026-08-16 — deterministic & reproducible

Free online EPUB validator and repair tool for KDP upload errors and EPUBCheck failures.

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

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To cite this score: legit.show/s/epub-fixer-com/2026-08-16. That address never changes; this page moves with every re-measure.

Legit.Show scored EPUB Fixer 92/100 on 2026-08-16, measured across all 7 frames from its public surface. legit.show/s/epub-fixer-com/2026-08-16

Is EPUB Fixer production-ready?

Legit.Show scores EPUB Fixer 92 out of 100 — the simple average of its 7 measured frames. Legit.Show ran its deterministic 7-Frame production-readiness benchmark on EPUB Fixer (public-surface assessment), measured from the public surface with no LLM in the scoring path. Its strongest frame is Accessibility; its weakest is Security. Every frame it averages is published with its evidence on the Legit.Show listing.

The 7 Frames

• Performance — 96/100
• Accessibility — 100/100
• Security — 45/100
  How this compares across the catalogue: The Web Security Baseline
• Privacy — 100/100
  How this compares across the catalogue: The Privacy Gap
• Reliability — 100/100
• Standards — 100/100
• Discoverability — 100/100

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 — 459 ms to first byte.
• Returns a proper 404 for unknown routes.
• 3 of 3 sampled routes reachable.
• Has a reachable privacy policy.
• Sets cookies / loads scripts with no consent prompt.

Who it's for

Self-publishing authors · KDP publishers · EPUB creators · Indie authors

Pricing

Free

Sources and updates

Description

Taken from epub-fixer.com's own website on 2026-07-10.

Operator

EPUB Fixer, as named in epub-fixer.com's terms, privacy page or footer.

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 2026-08-16.

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

Visit EPUB Fixer → · Alternatives to EPUB Fixer → · How this was measured →