AI EPUB Translator
What stops people reading a book in another language is rarely the hard words — it is the rhythm. Every lookup breaks the thread, and by chapter three you have forgotten chapter one. An EPUB translator changes that: translate the whole book first, then read it at your own pace.
Upload an EPUB to start translating
Geyi takes a whole EPUB, parses it chapter by chapter, translates it and rebuilds a book you can drop straight into a reader. The table of contents, paragraph structure and images stay where they were.
Geyi EPUB translation takes a whole EPUB, parses it chapter by chapter, translates it and rebuilds a book you can drop straight into a reader, with the table of contents, paragraph structure and images where they were.
Key capabilities
- Whole-book translation, parsed chapter by chapter
- Exports EPUB with contents and chapter navigation, or Word, PDF and Markdown
- Personal glossary keeps names and terms consistent across the book
- Optional bilingual PDF and Word for language learning and proofreading
- Estimate for the book shown after upload and before you submit
How a whole book is billed
EPUB goes through the local parsing path: 8 credits a page on high precision, 2 on standard, where a page counts as 1,600 characters. A 200,000-character book works out at roughly 125 pages — about 1,000 credits on high precision, or about 250 on standard.
The estimate for your book appears after upload and before you submit. EPUB content density varies a lot — an image-heavy book and a prose-only one are not comparable — so the estimate is flagged as approximate, and the final charge follows the content the server actually parses.
What you can do with the translation
- Export EPUB: drop it into a reader, with the table of contents and chapter navigation intact.
- Export Word: for further editing or typesetting.
- Export PDF: for printing or archiving.
- Export Markdown: for folding the text into a notes library or writing setup.
- Bilingual output (optional): an extra PDF and Word pair with original and translation interleaved, which suits language learning and proofreading.
Consistency across a long book
Names, places and coined concepts that shift between chapters pull a reader straight out of the book. A personal glossary pins those terms so the whole book uses one set of renderings.
For very long books you can also split by volume or part and submit several files; each is billed separately and each result waits in History.
Before uploading
Sign in to upload and submit a translation. File size and concurrent-task limits follow your account allowance and the upload panel. Choose from the source languages, target languages and output formats available in the tool. Check estimated credits and your balance before submitting; translation is not an unlimited free service.
EPUB format limits
EPUB is parsed chapter by chapter and rebuilt as a translated book, retaining its chapter structure and images. Fixed-layout ebooks and complex styles may display differently from the original; spot-check the exported result.
Geyi compared with generic machine translation and a manual workflow
The generic machine translation and manual workflow columns describe common cases; actual results vary by tool and method. The Geyi column lists only capabilities that are live in the product today.
How to translate an EPUB
- Sign in and upload Upload an EPUB you are entitled to process, without DRM, and check your account file-size limit.
- Choose translation options Select source and target languages and precision, review the estimated credits, then submit.
- Preview and download Wait for completion, check chapters, contents and images in History, then download your chosen format.
See it in action
The first four paragraphs of Chapter I of the 1872 sixth-edition EPUB become Simplified Chinese, retaining chapter and section headings and paragraphs. The opening-page comparison previews ebook translation.
EPUB chapter excerpt: opening pages of the English source and Simplified Chinese translation; long paragraphs continue naturally across output pages.
Generated through Geyi’s pipeline, then checked against the source and edited for display. These are excerpts; translations are in Simplified Chinese. · Source: The Origin of Species · sixth-edition EPUB, Charles Darwin, 1872 (The 1872 sixth edition; excerpted from the supplied Standard Ebooks EPUB, whose electronic edition includes a CC0 dedication.)
Frequently asked questions
What does a book cost?
At 1,600 characters a page, high precision is 8 credits a page and standard is 2. A 200,000-character book is roughly 125 pages — about 1,000 credits on high precision, or about 250 on standard. The estimate for your book is shown before you submit.
Is the result still an EPUB?
It can be. Choose EPUB at export and you get a book that opens straight in a reader; Word, PDF and Markdown are available at the same time.
Do the table of contents and chapter links survive?
Yes. EPUB is parsed chapter by chapter, and the chapter structure carries through to the translation.
Can DRM-protected ebooks be translated?
No. Files with digital rights management cannot be parsed — use files you are entitled to process and that carry no DRM.
Are illustrations lost?
No. Images stay in the document, in place.
How long does a book take?
It depends on length and the current queue; long books take a while. The job runs in the background, so you can close the page and collect the result from History.
Can I test a sample first?
Yes, and it is the cheapest way to decide. Run one chapter on standard to check the tone, then choose a tier for the whole book.
What if a file exceeds a limit or fails?
For oversized files, split the document or check your account allowance before retrying. For parsing failures, check for damage, encryption or DRM. Read the task failure reason, then use the offered retry action or contact support with the task ID. A processing task does not yet have a downloadable result.
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Geyi is a proprietary AI document platform owned and operated by Nayuta Technology and Culture Company Limited.