Edit EPUBs, right on your phone.
Import a book, fix its title, cover and chapters, then export a clean EPUB3. Everything stays on your device — no account, no upload.
What it can do
- Edit title, author, language, publisher & description
- Replace the cover image
- Edit chapter text, reorder, add, delete, merge & split chapters
- Rebuilds the table of contents on export
- Exports a valid EPUB3, ready for Aurum or Kindle Scribe
- Cover fit for your Kindle — Scribe, Paperwhite, Oasis and more
- Amazon KDP readiness check before you publish
- Auto-fetch metadata and covers from Google Books and Open Library — you pick the match
- Fix chapter organization: split, merge, clean up, and retitle chapters
- One-tap Scribe cleanup, find & replace across chapters, and batch cleanup for several books at once
Tip: DRM-locked store copies won't open here — this works with plain, DRM-free EPUBs.
Book details
JPG or PNG works best.
Auto-fetch metadata
One tap searches Google Books and Open Library for this book — only the title, author, or ISBN you search with is sent, never the book file. Results are ranked, and you pick the match, so a wrong book never overwrites yours silently. Series data is sparse in those two sources, so check the Series fields after applying.
Covers found — tap one to use it
Book info
Chapters
Auto-organize chapters
Let the app look through the whole book first: it checks the table of contents order, moves front matter (Cover, Copyright, Preface…) to the front and back matter (Epilogue, Appendix…) to the end, renames chapters whose titles are wrong (to the TOC title, to their heading, or by renumbering), then fixes splits, empty chapters, untitled chapters, missing headings, dangling headings, and duplicates — all in one preview. Tiny chapters are left as-is, not merged automatically. Nothing changes until you tap Apply, and your original file is untouched until you export.
Chapters don't match the book?
Some books pack several chapters into one file, with the table of contents pointing to sections inside it — that's the usual reason an app shows 2 chapters when the book really has 8. This checks the book's own table of contents against the chapters found, and can rebuild the chapter list from it.
Uncheck anything you don't want as a chapter (front matter like Cover or Copyright is often in the TOC but isn't a chapter). Nothing changes until you tap Apply.
Fix this book for Scribe — one tap
Runs, in order: rebuild chapters from the table of contents (if they don't match), fix chapter organization, strip scripts, remove broken images, and resize the cover to Scribe 1860 × 2480. Front matter in the TOC (Cover, Copyright, etc.) is skipped. Your original file is untouched — export to save the cleaned copy.
Fix broken images
That blue “?” in a reader is usually an image whose file is missing from the book, empty, or actually an HTML page saved as a picture. This finds those images (in chapters and the cover), shows you exactly which ones, and removes them — including their entry in the book's file list, so the exported book doesn't still point at a missing file. A removed cover leaves the book coverless until you add a new one in Cover & KDP.
Find & replace in this book
Searches chapter text and chapter titles (never HTML tags). Case-insensitive unless you check Match case.
Tap a chapter to edit it. Use ↑ ↓ to reorder, or merge a chapter into the one below it. “Fix organization” previews splits at extra headings, merges of tiny chapters, removal of empty chapters, title fixes, and chapter-number sorting — nothing changes until you tap Apply.
Cover fit — pick your Kindle
Resizing never stretches your cover. Crop-to-fill trims the edges to fill the screen; Pad keeps the whole image and fills the leftover space. Your Scribe is selected by default — change it any time.
Note: a Scribe-fit cover (3:4) is for reading on your Scribe. KDP publishing wants a taller 1.6:1 cover — pick the KDP size above if you're publishing, not reading.
Amazon KDP readiness
This is a pre-flight check, not Amazon's approval. It flags the things KDP most often rejects: missing title/author, a bad cover, empty chapters, and a broken table of contents. Export always rebuilds your TOC.
KDP eBook cover spec, checked here: 1600 × 2560 px ideal, at least 1000 px on the long side, height ÷ width of 1.6, JPEG or TIFF, RGB, under 50 MB. Manuscript limit: 650 MB. EPUB is KDP's recommended format; MOBI is no longer accepted for new uploads.
Export
Export rebuilds the table of contents from your chapter titles, updates the book details, and packs a fresh EPUB3. Your original file is never overwritten — this downloads a new copy.
Before you send it on
- Open the download in Aurum or your reader to check images and headings.
- If a chapter looks empty, check that it has at least one paragraph.
Batch — clean several books at once
Load several EPUBs, pick the same fixes for all of them, run once, then download each cleaned book — or all of them as one ZIP. Everything stays on your device. Batch does not guess metadata (no online lookup per book); it does the structural cleanup: TOC rebuild, chapter organization, script stripping, Scribe cover fit, and an optional find & replace.
Fixes to apply to every book
If a book is already open in Book/Chapters, it is left untouched — batch restores it when it finishes. Your original files are never overwritten; these are new cleaned copies.