Justdown

Justdown is a Markdown note-taking application specifically for Japanese learning.

Its core function is to correctly display furigana (reading kana). When writing Chinese characters 《かんじ》 using the Aozora Bunko notation, the reading kana will be superimposed above the Chinese characters in the preview, showing like a Japanese book.

【Furigana Input】
• Aozora Bunko/Pixiv notation: Chinese characters 《かんじ》 → The reading kana is shown above the Chinese characters
• Divide the boundary with ｜: ｜お茶《おちゃ》
• Support direct input of HTML ruby tags (support copy and paste)
• The quotation marks 「」『』 are not converted, and Japanese sentences can be freely written

【Markdown Editor】
• Real-time preview: Support GFM-style headings, lists, tables, quotations, etc.
• Syntax highlighting for code blocks (light/dark themes)
• Keyboard toolbar: Input 《 》·｜·heading·bold·code block by one click
— No need to laboriously input special characters on the Japanese keyboard

【Learning Optimization】
• Table of Contents panel: Can directly jump to the headings
• Find in note: Can run on both sides of the editor and preview, and show the number of matches
• Search the whole note, automatically save immediately after input

【Privacy First】
• All notes are only saved on the device
• No account needed, no ads, no tracking, no network communication