Deterministic private processing

Make Japanese ebooks easier to read.

Add local reading support while controlling how existing ruby, generated readings, and writing direction are handled.

Original file never modified Live conversion progress No provider or model calls
Japanese text with furigana on an e-reader
読書どくしょ、自分のペースで。
Converter

Prepare your ebook

5 steps
1Choose a bookEPUB, AZW3, MOBI, TXT, or HTML
2Processing modeChoose furigana, dictionary study, or guided language analysis
3Reading assistanceChoose how generated furigana is handled; Combined mode always adds missing readings
4Book layoutPreserve or set the reading direction
5OutputChoose the file you want back
Ready when you areProgress logs counts, stages, rates, and ETA—not book text.