Corrupt an eBook File Online
Corrupt an EPUB, MOBI or AZW3 e-book online for free. Destroys the container and metadata records so readers and Kindle cannot open the book.
- No upload
- No size limit
- No sign-up
Corrupt your e-book file
Tuned for .epub, .mobi, .azw3, .azw, and works with every other format too.
Why e-book files are hard to corrupt properly
EPUB is a ZIP package of XHTML chapters; MOBI and AZW3 are PalmDB records with a BOOKMOBI header. Both formats are read from an index, and both are handled leniently by readers, Calibre in particular will rebuild a book from surprisingly little.
What this tool destroys
- EPUB container. The
mimetypeentry,META-INF/container.xml, the central directory and the EOCD record are all destroyed. - The OPF spine. The package document listing reading order and manifest entries is unreachable once the archive index is gone.
- MOBI headers. For Kindle formats the PalmDOC header, the
BOOKMOBIidentifier and theEXTHmetadata block are overwritten. - Chapter payload. Entropy is scattered through the compressed text records so carving tools recover nothing readable.
What you will see afterwards
| Application | Behaviour |
|---|---|
| Apple Books | "This book could not be opened" and the import is rejected. |
| Calibre | Reports the file as an invalid or unsupported e-book. |
| Kindle / Send to Kindle | Conversion fails and the book never appears in the library. |
| Adobe Digital Editions | Refuses to add the item to the library. |
Common reasons people do this
- Testing an e-book store or library ingestion pipeline.
- Verifying a conversion service reports failures rather than shipping a broken book.
- Producing damaged samples for a digital-preservation exercise.
- Checking that a reading app fails gracefully rather than crashing.
How to corrupt a e-book file
- Drop your .epub file onto the box above, or click to browse.
- Leave the level on Standard unless you want partial damage (Light) or need to defeat recovery software (Heavy).
- Press Corrupt file. Processing happens on your device, so it finishes almost immediately.
- Download the result. It keeps the original filename and byte length by default.
E-book FAQ
Which e-book formats are supported?
EPUB is handled as a ZIP package; MOBI, AZW, AZW3 and PRC are handled through the Kindle profile. Any other format falls back to the generic binary profile.
Will Calibre repair the book?
No. Calibre reconstructs a book by reading the manifest and spine, both of which are destroyed at Standard level and above.
Does DRM affect the result?
No. DRM wraps the content, but the container and record headers we target sit outside it.
Does the cover image survive?
No. Covers are stored inside the same container or record structure and are destroyed along with it.