One Markdown

One Markdown

Fast Text & Textbundle Editor.

149 ratings
151 reviews
Free
In-App Purchases

Details

Released
January 8, 2021
Updated
October 23, 2026

Features

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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

1.6.8

October 23, 2026

* Improvements: Compatible with iOS/iPadOS 27, support iPhone Duo. * Improvements: Automatically restores the state of previously opened documents (whether in editing or preview, the document's scroll position, etc.). * New Feature: Preview mode now support Find. * New Feature: When scrolling through content in editing/preview mode, the corresponding heading in the Outline view will be selected to indicate the approximate position of the scrolling content. This feature was previously only available in macOS, but is now also supported on iOS/iPadOS. * Other bug fixes and improvements.

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Subscriptions & In-App Purchases

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User reviews

Great app

Great app, but It would be better if I can remove it from the dock when it closed

Awesome

The only bug I found very annoying - after switch from app to another one and then come back - the opened md file isn’t rendered correctly - there is only blank screen. After toggle any button - edit mode or view mode or else one - it displays the document

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.

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.