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Bestanden & Media

EPUB Validator

Check the structure of any EPUB file — in your browser.

Runs in your browser

Drop an .epub or click to browse

Validates mimetype, container.xml, OPF metadata, manifest and spine — entirely in your browser.

Redactionele opmerking

Understanding · epubcheck — the gate every distributor runs.

Dit uitgebreide hoofdstuk is momenteel alleen in het Engels beschikbaar. De conversietool hierboven werkt in jouw taal; de lange uitleg is nog niet vertaald.

Veelgestelde vragen

Quick answers.

Which EPUB versions are supported?

The tool validates both EPUB 2 and EPUB 3 standards, checking for version-specific requirements in the `content.opf` and navigation files.

Is my manuscript private?

Yes. The validation logic runs locally in your browser so the file stays on your machine and is never transmitted to our infrastructure.

What does a 'manifest mismatch' error mean?

This occurs when a file exists inside the EPUB archive but is not listed in the `content.opf` manifest, or vice versa.

Can it fix the errors automatically?

No, this is a diagnostic tool designed to identify structural issues. You will need to use an e-book editor to apply the recommended fixes to your source file.

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