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EPUB Fixer
Find EPUB errors and verify safe repairs before KDP upload
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.
Hi Product Hunt 👋
I built EPUB Fixer around a frustrating publishing problem: an EPUB can open normally in Calibre but still fail KDP, Kindle Previewer, or EPUBCheck, and the error message often does not make the next step clear.
EPUB Fixer is designed for finished reflowable EPUB 2 and EPUB 3 files. Upload one file and the report shows:
• The exact affected path inside the EPUB
• Whether the issue has a deterministic checked repair, needs manual review, or is outside scope
• A repaired download only after the file passes EPUBCheck again
It does not redesign book formatting, convert DOCX or PDF files, or guarantee KDP acceptance. The goal is narrower: help authors understand what can be repaired safely and what needs human judgment before another upload.
Scanning is free, no signup is required, and uploaded EPUB files are deleted after 24 hours.
I would especially appreciate feedback from self-published authors and ebook formatters: which EPUBCheck or KDP error has been the hardest for you to understand or fix?
finally something that tells me exactly which file path is breaking instead of just saying "epub is invalid," saved me a ton of trial and error on my last upload.
About EPUB Fixer on Product Hunt
“Find EPUB errors and verify safe repairs before KDP upload”
EPUB Fixer was submitted on Product Hunt and earned 3 upvotes and 2 comments, placing #160 on the daily leaderboard. 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.
EPUB Fixer was featured in Web App (122.9k followers), Writing (59.3k followers) and Books (122.5k followers) on Product Hunt. Together, these topics include over 60.1k products, making this a competitive space to launch in.
Who hunted EPUB Fixer?
EPUB Fixer was hunted by shangyin wei. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
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