Prepare content for your Matcha Reader
Everything runs in your browser. Your files never leave your device, except manga panel images sent to Google's Gemini API for text recognition when you provide your own API key.
Manga Converter
Turn a CBZ, EPUB, PDF, or a folder of page images into the reader's manga format — panel detection, Japanese OCR, and English translations included.
Dictionary Converter
Convert Yomitan dictionaries (Jitendex, JMnedict, grammar references), jmdict-simplified JSON, or MDict .mdx into the on-device lookup format.
Font Converter
Convert TTF/OTF fonts (like Japanese reading fonts) into .cpfont files for
the SD card, with kerning and ligatures.
Getting files onto the device
Each tool downloads a zip laid out for the SD card. Either unzip it onto the card with a card reader, or use the reader's built-in Wi-Fi web file transfer to upload the files.