EPUB Fixer helps indie authors diagnose reflowable EPUB 2 and EPUB 3 files that fail KDP, Kindle Previewer, or EPUBCheck.

Upload one EPUB to see the exact affected internal paths and whether each issue has a checked repair, needs manual review, or is outside scope. A repaired copy is available only after it passes EPUBCheck again.

EPUB Fixer is designed for finished reflowable EPUB files. It does not redesign book formatting, convert DOCX or PDF files, or guarantee KDP acceptance.

Scans are free, no signup is required, and uploaded files are deleted after 24 hours.