Validate, repair, and convert EPUB, MOBI, and AZW3 ebooks.
About this tool
Fix ebooks that won't open. Validate, repair, and convert EPUB, MOBI, and AZW3 files — correcting manifest, spine, TOC, and metadata errors with epubcheck and Calibre-style processing, all in the browser.
What it does
- Validate EPUB files with epubcheck-style checks
- Repair manifest, spine, TOC, and metadata errors
- Convert between EPUB, MOBI, and AZW3
- Detailed validation reports
- In-browser processing
Repository
chayprabs/epub-validate-repair
Source code, issues, and releases
Spotted a bug or have an idea?
This tool is built in the open and shaped by feedback. If something feels off — or you want a feature — I read every message.