Yomu Markdown Editor Is Now Available

Sep 1, 2026

I released Yomu, a browser-based Markdown editor for reviewing a Markdown draft and preparing it for different publishing destinations.

Open Yomu

From AI-generated Markdown to the place you publish

A draft from ChatGPT or Claude can look fine as Markdown but still need cleanup when it is moved into WordPress, Microsoft Word, Google Docs, or publishing platforms.

Yomu treats Markdown as the source document. You can edit and preview it first, then convert or export only when the destination requires a different format.

What it can do

Edit and preview Markdown from ChatGPT, Claude, or another source
Prepare content for note, a Japanese publishing platform
Convert content for WordPress Gutenberg blocks
Work with Hatena Blog workflows, including its Markdown and Hatena-notation modes
Export to Word (.docx)
Export or print as PDF and HTML

Yomu is not meant to replace a destination's native features when those features already work. If a normal paste is enough, that is usually the simpler route. It becomes more useful when the same reviewed draft needs to move across several destinations or when you want to keep Markdown as the source of record.

Browser-side processing

Markdown editing and conversion are designed to happen in the browser. The text is not sent to an external conversion API just to produce another format.

A browser-based interface alone does not guarantee local processing, so I treat the processing location and the page's network access as separate questions.

For more detail, see Are Online Markdown Editors Safe? What to Check and How to Make “No Upload” Enforceable in the Browser.

Guides and practical comparisons

I am also publishing guides around the problems Yomu is meant to help with, including:

Use Yomu only where it removes real friction; otherwise, the destination's own tools are usually the shortest path.

Japanese version: Markdownエディタ「Yomu」を公開しました

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