Chapter-aware workflow
We extract chapters in reading order before translation so long books stay organized.
GoodTrans
EPUB Translator
Translate EPUB books online with chapter-aware processing, terminology guidance, bilingual review files, and a quality report delivered by email.
Traduction professionnelle de documents
Consistent terminology
Glossary notes and document-level checks help names and key terms stay consistent.
Review-ready files
Receive editable Markdown and TXT plus a bilingual review file and quality report.
Async email delivery
Submit your book and get an email when the translation package is ready.
What an EPUB file actually is
An EPUB is not a single block of text. It is a small website in a zip archive: one file per chapter, a table of contents, images, styles, and a spine that defines reading order. That structure is why an EPUB opens with clean chapters on an e-reader while a pasted version of the same book becomes a wall of text.
Translation inherits that constraint. A workflow that ignores reading order produces chapters in the wrong sequence, headings that turn into ordinary paragraphs, and footnotes that wander away from their references. Serious EPUB translation has to respect the package first and translate second.
How EPUB translation works here
GoodTrans treats a book as a document workflow rather than a chat exchange. The steps are simple:
- Upload the EPUB file on the translate page and confirm the source and target languages.
- Add terminology notes for names, places, brand terms, or recurring phrases you want handled consistently.
- Review the credit estimate, then submit. The task runs asynchronously — you can close the tab.
- Receive an email when the package is ready: editable Markdown, clean TXT, a bilingual review file, and a document-level quality report.
Because processing happens in the background, long books do not need an open browser window. Most of your review work starts only after the full translation exists.
When a free EPUB translator is enough
Honest answer: sometimes. If you only want to follow the plot of a novel for personal reading, a free translation tool will get you there faster and cheaper. GoodTrans is not the right tool for that job.
The calculus changes when the translation is a deliverable — a manuscript you will edit, a technical book you will share with a team, or a text where names, numbers, and terminology must hold together across hundreds of pages. That is where structure-aware processing, a glossary, and review files earn their keep.
What you receive when the task completes
Every completed task arrives as a package rather than a wall of translated text:
- An editable Markdown translation that preserves headings, lists, and basic structure.
- A plain-text TXT version for any downstream tool.
- A bilingual review file that pairs source and translated passages for side-by-side checking.
- A quality report that flags omissions, terminology drift, and structural changes for your review.
GoodTrans does not compile a new EPUB file. The deliverable is the editable text layer; repackaging into EPUB stays with your publishing toolchain.
EPUB translation questions
How can I translate an entire book?
Translate a book the way you would hand it to a service: upload the complete file, set the languages, add terminology notes, and let the pipeline process it end to end. GoodTrans extracts chapters in reading order, translates with document-level context, and emails you the finished package with review files.
Is there an app that can translate a book?
Yes — GoodTrans is a web app built for long books. Unlike paste-a-paragraph translators, it processes the whole file, applies your glossary, and returns editable files plus a quality report. For casual reading of a single chapter, a free tool remains a fine choice.
How much does it cost to translate a book?
It depends on length and language pair. Professional human services commonly quote 1,000 USD or more per 10,000 words, which puts a full novel into the four-to-five-figure range. GoodTrans charges credits per task and shows a cost estimate before you submit — check the pricing page for current packages.
How do I translate an EPUB book?
Upload the EPUB to the translate page, choose your target language, and optionally add a short glossary. The system unpacks the chapters, translates them in order, and delivers editable results by email. You can review the bilingual file before using the text anywhere.
Will chapter structure and terminology stay consistent?
The workflow extracts chapters in reading order, applies your glossary where terms match, and runs document-level checks for names, numbers, and structure. The quality report shows what it found. Final editorial judgment stays with you — that is what the review files are for.
Do I get the translation back as an EPUB file?
No. You receive editable Markdown, TXT, a bilingual review file, and a quality report. This keeps the translation easy to review and revise. If you need an EPUB again, your existing publishing or conversion tooling can repackage the translated text.
Related translation workflows
Technical document translation
Terminology-controlled translation for manuals, specs, and API docs.
Markdown translation
Translate Markdown files while preserving headings, lists, tables, and code.
Document translation
The core AI workflow for long documents, with a quality report.
Document translation services
What the service includes and how pricing works, end to end.
Machine translation post-editing
Human-quality refinement of machine translation output with reflection-based review.
Have a book ready? Start a translation now, or check pricing first — a cost estimate is always shown before a task begins.