Read any book in two languages
Upload an ePub, pick a language, and get the same book back with a translation under every paragraph. Layout, images and chapters stay intact.
These files are the pipeline's real output. Download one and open it in Apple Books, Calibre or any ePub reader.
See it before you try it
Pride and Prejudice — Jane Austen · Chapters 1–2, sample · English → Simplified Chinese
It is a truth universally acknowledged, that a single man in possession of a good fortune must be in want of a wife.
凡是有钱的单身汉，总想娶位太太，这已经成了一条举世公认的真理。
However little known the feelings or views of such a man may be on his first entering a neighbourhood, this truth is so well fixed in the minds of the surrounding families, that he is considered as the rightful property of some one or other of their daughters.
尽管这样的男人第一次来到一个地区时，他的感情或看法如何，人们知道得很少，但这条真理在邻近的各个家庭中却是如此根深蒂固，以致于他被视为他们某个女儿理所当然的财产。
“My dear Mr. Bennet,” said his lady to him one day, “have you heard that Netherfield Park is let at last?”
“亲爱的班纳特先生，”他的太太有一天对他说，“你听说尼日斐花园终于出租了吗？”
Built for whole books
Names stay themselves
Before translating, we read through your book and build a glossary of people, places and special terms. Every request carries it, so “Mr. Darcy” is the same person on page 3 and page 300, and you can edit the glossary yourself.
Your book, not a rebuild
Translations are inserted into the original file, right after each paragraph. Chapters, images, footnotes, fonts and styles stay exactly where the publisher put them.
Every line editable
Disagree with a sentence? Click it, fix it, re-export. The built-in editor covers every paragraph and the glossary.
Impossible to lose work
Every finished batch is saved instantly. Close the tab, lose your connection or cancel, and the next run picks up exactly where it stopped.
A novel in minutes
Dozens of parallel requests with speed that adapts to the model. A full-length novel typically lands in 10–30 minutes.
Reads anywhere
The output is a standard ePub. If it reads books, it reads yours: Apple Books, Kindle via Send-to-Kindle, Calibre, KOReader.
How it works
Upload your ePub
We read every paragraph, pull the cover, and build a glossary of names and terms so the whole book is translated consistently.
We translate it
Paragraph by paragraph, dozens of requests in parallel. Watch live progress, or close the tab and come back later while it keeps going.
Download the bilingual book
Each translation sits right under its original paragraph. Edit anything you like, export, and read in any ePub reader.
Simple pricing
Per book
Pay once for the book you upload. As a guide, about $1 per 100,000 characters of plain English text, $2.99 minimum; Chinese or Japanese characters count about three times as much. The exact price is shown after upload, before you pay, and covers the whole translation.
Example: the full Project Gutenberg ePub of Pride and Prejudice, about 730,000 characters, is quoted at $7.37.
Monthly
For readers with a stack. Each paid month adds 6,000,000 credits. Credits are model tokens, the input plus output tokens of your translations. For scale, the full Pride and Prejudice is estimated at about 1.5 million credits; actual use is the real tokens spent. Renews every month until you cancel in Settings, and the plan stays active until the end of the paid month. Unused credits carry over. When credits run out, you can still buy any book on its own.
Questions, answered
What do I get back?
A regular ePub file. Every paragraph of the original is followed by its translation in a subtle secondary color. It opens in Apple Books, Kindle, Calibre, KOReader and anything else that reads ePub.
Does it keep names and terms consistent?
Yes. Before translating, we build a glossary of recurring names, places and terms from your book, and every translation request uses it. You can review and edit the glossary too.
Can I fix a translation I don't like?
Every paragraph is editable in the built-in editor. Edit anything, then re-export the ePub in one click.
What about the book's layout and images?
We never rebuild your book from scratch. Translations are inserted into the original file, so chapters, images, footnotes and styles stay exactly where they were.