Translate ebooks into bilingual EPUBs
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EPUB, MOBI or AZW3 under 10 MB · text-based, DRM-free books
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Video · 20 seconds
Bilingual EPUBs for any book
Every paragraph followed by its translation, in a real EPUB file.
File rules and token allowances
- Requires text-based, DRM-free EPUB, MOBI, or AZW3 files under 10 MB; scanned image books are not supported.
- Exported EPUBs regenerate the table of contents and text paragraphs without original covers, illustrations, or complex formatting.
- Guests can start and download with the 2M-token trial; signing in gives 10M tokens every 30 days and keeps books available across devices.
Export format examples
An excerpt from Alice’s Adventures in Wonderland with a prepared Spanish translation, showing the two reading formats. This is not a live translation result.
Alice’s Adventures in Wonderland · Lewis Carroll
Bilingual EPUB
Alice was beginning to get very tired of sitting by her sister on the bank, and of having nothing to do: once or twice she had peeped into the book her sister was reading, but it had no pictures or conversations in it, “and what is the use of a book,” thought Alice “without pictures or conversations?”
Alicia empezaba a cansarse mucho de estar sentada junto a su hermana en la orilla y de no tener nada que hacer. Una o dos veces había mirado el libro que leía su hermana, pero no tenía dibujos ni conversaciones. «¿Y de qué sirve un libro —pensó Alicia— sin dibujos ni conversaciones?»
Translation-only EPUB
Alicia empezaba a cansarse mucho de estar sentada junto a su hermana en la orilla y de no tener nada que hacer. Una o dos veces había mirado el libro que leía su hermana, pero no tenía dibujos ni conversaciones. «¿Y de qué sirve un libro —pensó Alicia— sin dibujos ni conversaciones?»
Exports retain table of contents and text paragraphs. Original covers, illustrations, and complex formatting are not preserved.
Source and reuse details
The original English text is public domain in the US. New sample formatting and translations are released under CC0. No modern published translation or illustrations are included. Public-domain status can differ by country.
Project Gutenberg · Alice’s Adventures in WonderlandInspect an EPUB before translating your own book
We translated this Spanish-to-English example in the production EPUB tool on 18 October 2026 using GPT-6 Luna. Both chapters finished, covering six segments: two headings and four story paragraphs. Compare the unedited original and translated text below, and download both export formats. This short sample does not prove how fast or well the tool translates a full book.
Original Spanish
La bibliotecaria le explicó que el grupo se reunía el jueves, no el martes. Lucía anotó la fecha antes de salir.English translation output
The librarian explained that the group met on Thursday, not Tuesday. Lucía wrote down the date before leaving.Verify these details: the meeting is on Thursday, not Tuesday. In chapter two, the distance is twelve kilometres and the reading time is fifteen minutes. Open both chapters in the downloaded file to confirm the paragraph order.
Download original fileSource and reuse permission (English)
Read the actual Spanish-to-English output
We downloaded both files from the live translator after all six segments finished on 18 October 2026. We replaced the internal package identifiers with public example identifiers, but left the original and translated text unchanged. We did not measure the exact processing time or token cost.
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Frequently Asked Questions
Can I translate and download a full book without signing up?
Yes. Guests can use the 2 million Tokens quota to translate a full book and download bilingual or translation-only EPUB files. Guests have daily usage limits; alerts will appear when reached.
How do I translate an EPUB into English? Which other languages can I choose?
Select English before choosing your ebook. You can also translate into Spanish, Japanese, Korean, Simplified Chinese or Traditional Chinese. LangBox processes the book chapter by chapter. Finished paragraphs appear while the rest of the translation continues.
Can the translated EPUB be used in other e-readers?
Downloads are standard EPUB files that work with readers supporting EPUB. Fonts, spacing and pagination depend on the reader.
What formats and file sizes are supported?
Supports DRM-free EPUB, MOBI, and AZW3 files under 10 MB with readable text. Scanned/image-only books are not supported. EPUB files between 10–100 MB can be processed chapter-by-chapter in the LangBox reader. For PDFs, please use our PDF translation tool.
Will the translation keep the original cover, images, and layout?
No. Exported files regenerate the table of contents and text paragraphs; covers, illustrations, and complex formatting are not copied.
Can I edit the translation?
Editing translations on this page is not supported. You can download the EPUB and edit it using an e-book editor. Bilingual versions keep the source text for easy verification.
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