Export a bilingual EPUB and test it in your reader
Translate a DRM-free text ebook, wait for every chapter to finish, and download a bilingual or translation-only EPUB. LangBox rebuilds the text and table of contents, but it does not keep the original cover, illustrations, or complex page layouts.
What is included in the exported EPUB
| What you see | What this means |
|---|---|
| Original and translated paragraphs | Bilingual exports include both. Translation-only exports omit the original body text. |
| Chapter navigation | The table of contents is rebuilt. Test the chapter links in your EPUB reader. |
| Original cover, illustrations, and complex layouts | Omitted in this text-only export. Keep your original file if you need these elements. |
| LangBox dictionary, saved words, and learning progress | Not exported to the EPUB. Use LangBox to access these features. |
Select a compatible ebook
Use a text-based EPUB, MOBI, or AZW3 file under 10 MB in the public translator. Image-only ebooks and DRM-protected files are not supported. The signed-in EPUB reader also accepts larger EPUB files up to 100 MB for chapter-by-chapter translation. Confirm your target language before starting. Guests use trial credits, while signing in provides a recurring free allowance and model selection.
Complete the translation before exporting
Check chapters near the beginning, middle, and end of the book to confirm translated paragraphs are present and every chapter is complete. The export option unlocks only after all chapters are translated. Downloading the source file will not give you a translated export. Any failed or incomplete chapter must be fixed before you can export the full book.
Select your reading format
Choose the bilingual format to display each original paragraph alongside its translation, which helps with checking accuracy and learning vocabulary. Choose the translation-only format to read without the source text. Both options generate rebuilt text EPUBs. Keep your original file if you need the illustrations, footnotes, or complex formatting.
Test the exported file in your reading app
Open the downloaded EPUB in your preferred reader and check the table of contents, first and last chapters, paragraph order, and font scaling. Display behavior varies by device. This guide does not certify compatibility with Apple Books, Kindle, or third-party apps. Follow your device's current import steps and verify the file before relying on it offline.
Use the source text to learn vocabulary
Inside LangBox, you can read a short passage, look up unfamiliar words, and save vocabulary for review, then return to the sentence to confirm its meaning in context. These interactive study tools only work inside LangBox; an exported EPUB does not transfer the LangBox dictionary, saved words, or learning progress to external readers.
Verify names, negations, and numbers
The Spanish reading-club sample mentions Thursday instead of Tuesday, a 12-kilometre distance, and a 15-minute duration. Keep the distance and duration separate. We translated and exported the linked files in the production tool on 18 October 2026 using GPT-6 Luna. Both chapters finished. We did not measure the exact processing time or token cost, and this small test does not predict full-book performance.
Inspect 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.
Download bilingual EPUB export sample