Validate
Run EPUBCheck against the technical EPUB specification and preserve the original finding codes.
FREE · NO ACCOUNT
Find out why your EPUB may be rejected.
Run the official EPUBCheck engine, inspect the package structure, and turn technical findings into explanations you can act on before publishing.
- Files are deleted immediately after the report is created
- 25 MB maximum
- No retailer approval or accessibility certification implied
INSPECTION REPORT
Your EPUB report
EPUBCheck findings
HELP SHAPE THE NEXT STEP
What would make this useful in your workflow?
We are testing demand before building automated repair or a batch API. Tell us what you actually need; this is not a sales call.
WHAT THIS PROTOTYPE DOES
A preflight report, not another converter.
Explain
Translate common package, manifest, navigation and markup failures into plain English.
Decide
Separate likely repair candidates from findings that need editorial or formatting review.
A passing result does not guarantee acceptance by Apple Books, Amazon KDP, Kobo, Google Play Books or any distributor. Each platform can apply additional rules.
COMMON QUESTIONS
Before you upload
Do you keep my book?
No. The uploaded EPUB and generated raw report are deleted after the response is created. We retain only aggregate result counts unless you explicitly submit the follow-up form.
Is this the same as retailer approval?
No. EPUBCheck tests conformance to the EPUB specification. Retailers can add their own content, metadata, formatting and distribution requirements.
Does this prove my EPUB is accessible?
No. The prototype reports a small set of accessibility signals. It does not replace Ace by DAISY, assistive-technology testing or professional review.