Free online tool — no sign-up
Each Japanese paragraph with its Chinese translation directly beneath it, in one EPUB. Read the Japanese first — and with this pair, read it properly rather than recognising it.
The first 15 pages of text are sent to our server to be translated. The file itself stays on your device.
A Chinese reader looking at Japanese has an advantage and a problem, and they are the same thing. The kanji are recognisable, so a page feels readable; but the grammar holding them together is entirely different, and a good number of the compounds mean something other than what they appear to. You end up with an impression rather than a reading, and no way to tell which sentences you actually understood.
That is precisely what a translation underneath fixes. It is not there to give you the meaning of a word — you can often guess that — but to tell you whether your guess was right.
Your browser opens the EPUB, walks each paragraph and inserts the Chinese beneath it inside the original file, rewriting only the chapter documents that received a translation, so cover, navigation and metadata pass through as they were.
A DRM-free EPUB. The bilingual file is assembled in your browser, not on a server.
Names and recurring terms are fixed once, so a compound is translated the same way on every page.
Each translation is styled beneath its paragraph, easy to tell apart at a glance — which matters when both blocks are in Han characters.
A complete EPUB carrying the book's own fonts and stylesheets, writing mode included.
The trap here is confidence, not laziness. You will recognise enough characters to believe you read the paragraph. Read the Japanese properly, then check against the Chinese — the checking is the point.
No furigana is added. Ruby has to be authored, not generated.
Fifteen pages get translations. The rest of the book stays in Japanese inside the same file.
The text is sent to a server and discarded when the job ends. The file never leaves your device.
Japanese first, and read it rather than skim it. The recognisable characters make it very easy to form an impression and move on; the Chinese underneath exists to catch exactly that.
The translated paragraph is set slightly smaller, in a different colour, with a rule down its edge — so it reads as a distinct block even when the two scripts look similar.
Yes. The file keeps its own stylesheet including its writing mode, and the translation is inserted as an ordinary paragraph that follows whatever the book already does.
Yes. Kindle has accepted EPUB directly since 2022 and renders both languages; email the file to your device or copy it across.
All free AI book tools · Free converters that run in your browser
The app builds the bilingual version of the entire book, with tap-to-look-up and your reading position synced across devices.
Open DualBook