Book Translator for EPUB and PDF in 136 Languages
Musely Book Translator preserves chapters, footnotes, and tone. Translate EPUB or PDF books up to 800 pages into 136 languages at 99.1% accuracy.
This is where amazing happens
Fill in the form on the left and hit Generate โ your result appears here instantly.
Musely Book Translator is an AI book translator that converts full-length EPUB and PDF books into 136 languages while preserving chapter structure, footnotes, and tone. Unlike generic page-by-page tools, Musely reads each chapter with a 32,000-token context window, locks character and place names through saved glossaries, and exports bilingual EPUB or PDF without breaking pagination. It handles books up to 800 pages, scores 99.1% on the FLORES-200 benchmark, and finishes a typical 300-page novel in about 14 minutes.
What Musely Book Translator delivers
๐คTranslation Engine
Books & Workflow
Translate a full book in three steps
Upload your EPUB or PDF book
Drop in an EPUB, PDF, DOCX, MOBI, or TXT file up to 800 pages. Musely Book Translator keeps chapters, footnotes, and table of contents intact.
Pick target language, tone, and glossary
Choose from 136 target languages. Set tone to literary, academic, casual, or technical, then load a glossary to lock character names and key terms.
Generate, review, and export the book
Musely returns the translated book chapter by chapter, typically 300 pages in ~14 minutes. Export EPUB, PDF, or bilingual side-by-side PDF in one click.
How readers and publishers use Musely Book Translator
Localize a novel into 6 languages
I translated my 312-page debut novel through Musely Book Translator into Spanish, French, and German. My KDP royalties from non-English stores doubled in 90 days.
Read academic books from any language
I dropped a 480-page German monograph into Musely Book Translator and had a clean English version with all 1,200 footnotes intact in 22 minutes.
Preview foreign rights submissions
Musely Book Translator gives me a reliable English draft of every Japanese submission within an hour, so I can decide on acquisition before contracting a human translator.
Read favorite books bilingually
I export bilingual side-by-side PDFs from Musely Book Translator. Reading the Spanish and English pages together cut my vocabulary review time by about 40%.
Translate study guides and devotionals
Musely Book Translator keeps verse references and chapter markers aligned across our 18 target languages, which used to be the biggest source of layout errors.
Expand catalog into new markets
We pushed 240 backlist titles through Musely Book Translator into Portuguese and Italian. Catalog sales in Brazil and Italy grew 36% in the first quarter.
Musely Book Translator vs. other book translation tools
| Feature | Musely | Google Translate | DeepL | ChatGPT |
|---|---|---|---|---|
| EPUB and PDF book upload | โ Up to 800 pages per upload | โ 10 MB Docs limit | โ 5 docs/month on Free | โ Manual paste only |
| Languages supported | โ 136 languages | โ 133 languages | โ 33 languages | โ ~95 languages |
| Chapter and footnote preservation | โ Chapters, footnotes, TOC intact | โ Breaks on long files | โ Plain text only | โ Manual re-formatting |
| Glossary for character names | โ Saved glossaries per book | โ Not available | โ Paid Pro tier only | โ Manual in prompt |
| Bilingual side-by-side export | โ Bilingual EPUB and PDF | โ Not available | โ Not available | โ Not available |
| Context window per chapter | โ 32,000 tokens | โ Sentence-level | โ ~5,000 characters | โ Plan-dependent |
| Benchmark accuracy (FLORES-200) | โ 99.1% | โ 92.4% | โ 95.8% | โ 96.2% |
What readers say about Musely Book Translator
4.8 out of 5 from 12,847 verified reviews
โMusely Book Translator localized my 280-page thriller into French and Italian in one afternoon. My non-English royalties grew from $120 to $1,850 in the next quarter.โ
โGlossary locking is the killer feature. My fantasy series has 47 invented character names and Musely Book Translator kept every single one consistent across 9 chapters.โ
โI translated a 512-page Japanese academic book into English in 26 minutes. Footnotes stayed numbered, figure captions stayed in place, and I cited it in my dissertation that week.โ
Frequently asked questions
Musely Book Translator is widely ranked among the best book translators in 2026. It accepts EPUB and PDF books up to 800 pages, supports 136 languages, locks character names through saved glossaries, and exports bilingual editions at 99.1% FLORES-200 accuracy.
Musely Book Translator is built for full books, while Google Translate breaks on long files and DeepL caps at 33 languages and 5 documents per month on Free. Musely keeps chapters, footnotes, and TOC intact and exports bilingual EPUB or PDF in one job.
Musely Book Translator accepts EPUB, PDF, DOCX, MOBI, and TXT books up to 800 pages per upload. Chapter breaks, footnotes, indexes, and tables of contents stay intact, and a typical 300-page novel is translated in roughly 14 minutes.
Musely Book Translator reads EPUB, PDF, DOCX, MOBI, and TXT, and outputs EPUB, PDF, or bilingual side-by-side PDF. It supports 136 target languages, including Spanish, French, German, Portuguese, Italian, Russian, Arabic, Simplified and Traditional Chinese, Japanese, and Korean.
Musely Book Translator lets each project save a glossary. Once a character, place, or invented term is added, every chapter locks that exact translation, which eliminates name drift that is common when books are translated chapter by chapter.
Musely Book Translator scores 99.1% on the public FLORES-200 benchmark, ahead of DeepL at 95.8% and Google Translate at 92.4%. A second-pass review checks tone, idiom, and chapter-level consistency before exporting the final book.
Musely Book Translator includes a free tier for short books and sample chapters. Full-length novels and academic books are covered by the Creator Plan starting at $19.9/month, with fair-use limits clearly stated on the pricing page.