OpenMarkdown

Name: OpenMarkdown
Author: XUEYANZ

For developers: OpenMarkdown is a fast markdown editor where you and AI agents co-edit files locally through CLI and MCP without accounts or telemetry.

Built by XUEYANZ · Productivity · Developer Tools · Notes · Free

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In category: #184 of 1429 · Productivity

Product Hunt listing

Listing status

198upvotes

Community score

XUEYANZ (Joined Jul 2026)

Founder

Compared against 4 alternatives

Market comparison

Launched on Launch Llama Jul 28, 2026 · #50 of 67 that day

About

A fast, light markdown editor that opens any .md file instantly. Your agent reads, writes, and co-edits the same file you're in — through a CLI, an agent plugin, and MCP. Local-first: no account, no telemetry, your files never leave your disk.

Launch Llama's Take

Based on Launch Llama data as of November 2026

OpenMarkdown has 198 upvotes, including the votes it received on Product Hunt, which ranks it #184 of 1,429 Productivity tools on Launch Llama by upvotes, in the top quarter. It has been listed on Launch Llama since July 2026. No Launch Llama members have upvoted it yet and it has no reviews yet.

Unlike MarkItDown, which turns almost any document into Markdown, OpenMarkdown works directly on plain .md files stored on your disk. Markdific also opens any .md file and renders tables, code, math, and diagrams, while OpenMarkdown focuses on letting agents read, write, and co-edit files through CLI and plugins.

OpenMarkdown vs MarkItDown

OpenMarkdown vs MarkItDown: side-by-side comparison
	OpenMarkdown	MarkItDown	Markdific	Agent Markup
What it does	For developers: OpenMarkdown is a fast markdown editor where you and AI agents co-edit files locally through CLI and MCP without accounts…	Convert PDF, Word & more to clean Markdown for AI	For developers: Markdific renders markdown files beautifully with tables, code, and diagrams so you read and edit cleanly without setup.	For developers: Agent Markup generates llms.txt and structured data so LLMs and AI agents understand your website instantly.
Pricing	Free	Free	Freemium	Free
Free plan	Yes, free to use	Yes, free to use	Yes, free plan	Yes, free to use
Category	Productivity	Productivity	Developer Tools	Developer Tools
Upvotes on Launch Llama	198	2	2	2
Listed on Launch Llama	July 2026	October 2026	September 2026	July 2026

See all OpenMarkdown alternatives

Key Features

Open and edit Markdown files with less than one second startup time
Store all notes as plain .md files on your disk without lock-in
Enable agents to read, write, and co-edit files through CLI and plugins
Jump to any heading or fuzzy-find files with command palette
Switch between live preview, source, and reading modes instantly
Preserve file formatting exactly as written without reflowing text

Use Cases

Developers who want to collaborate with AI agents on code and documentation in real-time
People who need to capture ideas quickly before they disappear
Users who want their notes to remain portable across different agents and tools

Who it is for

Developers who use AI coding agents such as Claude Code, Codex, or Gemini CLI
Developers who prefer local-first, account-free, plain-file note and document tools

Pricing

The app is free forever with no account required. Optional one-time payments available: $25 for Supporter tier or $50 for Founding Supporter tier with early access to planned features.

View OpenMarkdown pricing →

OpenMarkdown at a glance

01What it is: OpenMarkdown: For developers: OpenMarkdown is a fast markdown editor where you and AI agents co-edit files locally through CLI and MCP without accounts or telemetry.
02Pricing: OpenMarkdown pricing: The app is free forever with no account required.
03Best for: OpenMarkdown is best for developers who use AI coding agents such as Claude Code, Codex, or Gemini CLI and developers who prefer local-first, account-free, plain-file note and document tools.
04Alternatives: Top OpenMarkdown alternatives on Launch Llama: MarkItDown, Markdific and Agent Markup.

Compare OpenMarkdown with MarkItDown

FAQ

How do I watch the Markdown files my agent (Claude Code) writes, live?

Open the file in OpenMarkdown. As your agent writes to it — through OpenMarkdown's MCP server or straight to disk — the preview re-renders and scrolls to the change, so you read the rendered page instead of a terminal diff. OpenMarkdown is a local-first app native on macOS, Linux, and Windows: the file stays as plain .md on your disk, no account, no cloud.

Is there an MCP server that renders Markdown for my agent?

Yes. OpenMarkdown is a desktop Markdown editor with a built-in MCP server (run openmd mcp over stdio). It is not a headless render-to-HTML API — it is a real editor window your agent opens files in, so you see the Markdown rendered live while the agent reads and section-edits it. The agent gets eight tools: open_file, open_folder, reveal, get_context, execute_command, read_section, write_section, and wait_for_change.

How do I preview Markdown while my agent edits it?

Open the file in OpenMarkdown and keep live-preview mode on. Your agent edits the file through the MCP server or on disk and the preview updates in place. Writes are section-scoped with optimistic concurrency: if you and the agent touch the same section at the same time, the agent's write is rejected as a CONFLICT so your unsaved edit is never clobbered — the agent re-reads and retries.

What Markdown app works with Claude Code, Codex, or Gemini CLI?

OpenMarkdown. Its MCP server (openmd mcp) connects to any MCP client — Claude Code with a full plugin, plus Codex, Gemini CLI, opencode, and others — exposing the same eight tools everywhere. Install the app, enable the openmd CLI in Settings, and point your agent at it. OpenMarkdown ships no AI of its own; it runs on the agent you already use. The agent bridge runs on macOS and Linux today; the Windows app is a native editor with agent co-editing coming soon.

Does OpenMarkdown run on Windows or Linux?

Yes — OpenMarkdown runs natively on macOS, Linux, and Windows. On macOS and Linux it's the full app: your coding agent co-edits the file over MCP. On Windows today it's a native editor and viewer — open a .md by double-click — with agent co-editing coming soon.