One Markdown

One Markdown

Fast Text & Textbundle Editor.

127 ratings
149 reviews
Free
In-App Purchases

Details

  • Released
  • Updated
  • January 8, 2021
  • May 3, 2026
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About

A fast and simple editor for plain text, Markdown, and Textbundle formats. It offers full Markdown display, image previews, math formula rendering, and extensive customization options for themes and fonts. Includes tools for syntax input, table generation, and document outlining.

Supports CommonMark and GitHub Flavored Markdown
Full Markdown document display
Image and math formula previews
Customizable themes and fonts
Markdown syntax input menu and keyboard
Outline and word count view
Editor & Preview mode
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What's New in One Markdown

1.6.7

May 3, 2026

* Improvement: Opening Markdown documents with hundreds of images is now very fast. * Improvement: The style for exporting to PDF can now be selected from the custom themes. If you have a custom light theme, you can select it as the PDF style in the "Styles" button in the export to PDF interface. * Improvement: The mermaid library has been upgraded to version 11.14.0. * Other bug fixes and improvements.

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Subscription plans

One Markdown Yearly Subscribe

Yearly Subscription One Markdown app

$3.991 Year
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10

In-App Purchases

$9.99

One Markdown for Mac

The full-featured One Markdown app for Mac.

User reviews

Excellent md app

Great app. Easy to switch between editing and viewing modes. Lovely css themes as standard and ability to add your own. Improvement if possible: make the markdown keyboard similar to what you see in an app like bear notes, this would be slightly easier to use.

Perfect app

This is the best markdown app I have ever used!

Un editor utilissimo e intuitivo

One Markdown è uno degli editor Markdown più facili che abbia mai provato.

E’ intuitivo, leggero e molto user-friendly.
Io lo uso per creare o modificare file di contesto per l’AI e anche per prendere appunti.

Мне не подошел

- Стили по умолчанию довольно страшные. Любые другие стили и вообще любые настройки платно

Great, simple and fast

As a good product should be

Developer apps

FAQ

What is One Markdown?

One Markdown is a fast and simple application designed for editing plain text, Markdown, and Textbundle files. It provides a comprehensive editing experience with features like full Markdown display, image previews, and support for advanced syntax.

What Markdown features does One Markdown support?

It is based on CommonMark syntax and GitHub Flavored Markdown (GFM) extended syntax. This includes support for tables, code blocks, math formulas, task lists, footnotes, and table of contents (TOC).

Is One Markdown free to use?

The application is free to download and use, with in-app purchases available. This allows users to access additional features or customization options beyond the core functionality.

What kind of customization options are available?

Users can personalize their writing experience by setting favorite fonts or multiple fonts. The app also offers a selection of 11 light themes and 21 dark themes, with the added ability to create custom themes.

Can I preview my Markdown documents?

Yes, One Markdown offers a preview mode that allows you to see how your Markdown document will render. It supports previewing math formulas, mermaid, and Echarts drawings directly within the editor.