0 books

Your Library

All your epubs, organised just the way you like

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Drop your epub files here

or click to browse β€” .epub, .mobi, .azw3, .pdf

Cover Changer

Replace the cover art on any book in your library

πŸ“˜ Select a book
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Current cover

πŸ–Ό New cover image
⬆️Drop or click to browse
JPG, PNG, WEBP
πŸ’‘ How it works
  • Choose a book from your library.
  • Upload a new cover image (JPG or PNG, ideally 1600Γ—2400 px).
  • Click Apply Cover β€” the cover is saved to your library entry.
  • When you Download the book, the new cover is automatically embedded into the epub file.
πŸ“ Cover tips

Kindle Paperwhite displays at 1236Γ—1648 px. Good sources: Open Library, TheCoverDB, or Canva.

Send to Kindle

Download your books then send them wirelessly via Amazon's web uploader

Amazon Send to Kindle

Select books below, download them with one click, then drag & drop onto Amazon's Send to Kindle page β€” no email or app setup required. Files go straight to your Kindle library.

Open Send to Kindle β†—
Click a book to select it 0 selected
Preparing downloads…
πŸ“₯ How to send
  • Select the books you want (click to toggle).
  • Click Download Selected β€” each epub saves to your computer. Custom covers are embedded automatically.
  • Click Open Send to Kindle and sign in with Amazon.
  • Drag & drop the downloaded files onto the page and click Send.
  • Done β€” books appear in your Kindle library in seconds.
πŸ“± Open Send to Kindle β†—
πŸ’‘ Tips

Amazon supports EPUB, PDF, DOCX, TXT and more, up to 200 MB per file. Books with a custom cover will have it embedded in the downloaded file.

Repair & Clean

AI reads your epub, fixes what it can, and hands you back a clean file

Get a key at console.anthropic.com β€” new accounts get $5 free (~200 analyses). Key saved to localStorage.
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Drop an epub here to analyse

Or pick one from your library below

Reading your epub…
Parsing structure
β€”
Health Score
β€”
🚨 Issues Found
    βœ… What Looks Good
      πŸ’‘ Recommendations
        πŸ”§ What this repairs
        • Metadata β€” title, author normalisation, language, publisher, description, series tags.
        • Navigation β€” NCX dtb:uid sync, playOrder renumbering, duplicate id removal.
        • File hygiene β€” removes broken manifest hrefs & dangling spine itemrefs.
        • Compendium TOC β€” rebuilds navMap for epubmerge / multi-book epubs.
        • Free mode β€” Folio generates a repair prompt; upload both to Claude.ai to fix.