What is EPUB Fixer?
EPUB Fixer helps indie authors diagnose EPUB files that fail KDP, Kindle Previewer, or EPUBCheck. Upload one reflowable EPUB to see the exact affected paths, separate issues with a deterministic repair from those needing manual review, and download a repaired copy only after it passes EPUBCheck again. Scans are free, no signup is required, and uploaded files are deleted after 24 hours.
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