Drop your e-book here, or click to browse
.epub, up to 25 MB
Your book is never stored. It is held in memory to do the work, then dropped.
A full-length book takes a few minutes. Keep this tab open.
How the EPUB translator works
An .epub is really a zip file: one XHTML document per chapter, plus a stylesheet, the cover, the fonts, and a manifest that says what order to read them in. Most "translate my book" workflows flatten all of that into a Word file or a PDF and hand you back something that is no longer an e-book. This tool translates the text inside the package and rebuilds the same zip, so what you download is still a book. Italics, links, and footnote markers are repositioned to fit the grammar of the target language instead of being pinned to the original word order.
What gets translated
- Every chapter: paragraphs, headings, lists, block quotes, and tables
- The book title and description your reader shows in its library
- Both tables of contents (the EPUB 3 nav page and the older NCX)
- Image alt text, so screen readers work in the new language too
What stays untouched
- Cover image, illustrations, fonts, and the stylesheet, byte for byte
- Reading order, chapter files, and internal links between chapters
- The author's name, URLs, email addresses, and code samples
- The language tag is updated to the target language, so your reader hyphenates and reads aloud correctly
Known limitations
- DRM-protected books cannot be translated by anyone. If the file came from Kindle or an Adobe
.acsmlink, its text is encrypted and no tool can read it. - Text baked into a picture (a cover, a map, a scanned page) stays in the original language, because it is a picture. Our PDF translator can OCR scanned pages if that is what you have.
- Read-along audio narration (media overlays) keeps its original timing, so the narration will not match translated text.
- Kindle formats (
.mobi,.azw) need converting to EPUB first, which Calibre does for free.
Tips for a book that reads well
- Use the glossary for character names, place names, and invented words. A novel is long enough that consistency matters more than any single sentence.
- Pick a specific target variant (Latin American vs European Spanish) for the right voice
- Leave source language on Auto-detect if you are not sure
- Skim a middle chapter after downloading, not just the first page
Frequently asked questions
Do I get back a real e-book, or just a document?
A real .epub. Most workflows flatten a book into Word or PDF and hand you something that is no longer an e-book. This tool translates the text inside the package and rebuilds the same zip, so the file you download still opens in any reader.
Is the table of contents translated?
Yes, and both versions of it. The EPUB 3 navigation page and the older NCX table of contents are both updated, so chapter names appear in the new language whichever one your reader uses.
Are the cover and layout preserved?
The cover image, illustrations, fonts, and stylesheet are kept byte for byte. Reading order, chapter files, and internal links between chapters are unchanged. The language tag is updated to the target language so your reader hyphenates and reads aloud correctly.
Can you translate a Kindle book or a DRM-protected file?
No. DRM-protected books cannot be translated by any tool, because the text is encrypted. Kindle formats such as .mobi and .azw need converting to EPUB first, which Calibre does for free.
What about text inside images?
Text baked into a picture, such as a cover, a map, or a scanned page, stays in the original language because it is a picture rather than text. The PDF translator can read scanned pages with OCR if that is what you have.
How big a book can I upload, and is it free?
Up to 25 MB per .epub file. It is free with no signup, and your book is processed in memory to produce the translation rather than being stored afterwards, so there is no stored copy to delete. The text is sent to the Gemini API from Google to be translated, on the paid tier, where the terms state prompts and responses are not used to improve Google products.