EPUB validation, the way retailers run it
Run the canonical epubcheck on every file and get clear, actionable reports — so a title is never rejected for a problem you could have caught in seconds.
Catch errors before a store does
Every retailer, aggregator and library validates the EPUBs you send them. If a file breaks the EPUB standard it bounces back — and you find out days later, mid-launch. Origami runs epubcheck, the canonical EPUB validator, on each file and turns its output into a report your team can act on.
Each finding is grouped by severity and tied to the rule it breaks and the spot in the file where it happens, so fixing is a checklist, not a treasure hunt. Validate one title or your whole catalogue — it is the same standard the stores run, so passing in Origami means passing with them.
The canonical validator
epubcheck 5.1.0 — the same engine reading systems and stores use — surfacing every fatal, error and warning.
Reports you can act on
Findings grouped by severity, each tied to the rule and the location in the file, so remediation is straightforward.
One file or the whole list
Validate a single title on demand, or validate files automatically as you ingest your catalogue.
How it works
Upload your EPUB
Drop in an EPUB 2 or EPUB 3 file from your workspace.
We run epubcheck
Origami validates it against the EPUB specification on the processing tier.
Fix and ship
Work down the report by severity and re-validate until it is clean.
Questions about EPUB validation
- What is epubcheck?
- epubcheck is the official conformance checker for the EPUB standard, maintained by the W3C. It is what retailers and reading systems use to decide whether a file is valid — which is why Origami runs the same tool.
- Which EPUB versions are supported?
- Both EPUB 2 and EPUB 3 files are validated.
- Does a clean report guarantee my book is accepted?
- epubcheck confirms technical conformance, which is what stores validate. Accessibility and store-specific rules are separate — Origami’s accessibility and quality tools cover those.
- Can I validate my whole catalogue?
- Yes. Run a single title on demand, or validate files automatically as you ingest them.
- What happens to my files?
- Your files stay in your own Origami workspace. Validation runs on the processing tier only when you start it, and the report is saved alongside the file for your team.
EPUB validation runs epubcheck 5.1.0, maintained by the W3C and released under the BSD-3-Clause license. EPUB is a registered trademark of the W3C.
Validate your next release in Origami
Start free and run epubcheck across your catalogue today.