MarkBun
verified Open Source Philosophy

Engineered for
Pure Expression.

MarkBun was born from a simple frustration: powerful writing tools shouldn't be locked behind subscriptions or proprietary formats. We built a precision instrument for the obsidian age.

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architecture Project Origins

MarkBun = Mark(down) + (Electro)bun.

Inspired by the seamless editing experience of Typora but committed to the ethos of open-source freedom. We wanted an editor that felt as fast as a terminal but as elegant as a high-end publication.

By leveraging Bun and Native WebView, we bypassed the bloat of traditional Electron apps, resulting in an editor that launches instantly and respects your system's resources.

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The Speed Mandate

Built on Bun, the JavaScript runtime designed for speed. Zero-lag Markdown rendering even in 100k+ word documents.

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Live Preview

A distraction-free interface that blends the source code and visual output into a single, cohesive canvas.

Our Core Values

The pillars that define every line of code we write.

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Local-First

Your data belongs to you. No cloud required, no proprietary syncing engines, just your files on your hard drive.

check_circle No proprietary lock-in
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No Telemetry

We don't track your keystrokes, your document titles, or your usage patterns. MarkBun is a silent partner in your work.

verified_user Privacy by design
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Transparency

The development process is fully transparent on GitHub. Anyone can inspect, audit, or contribute to the source code.

account_tree Community driven

Technical Architecture

MarkBun utilizes a dual-process architecture to ensure maximum performance and security. By decoupling the main logic from the rendering layer, we achieve a level of responsiveness that Electron-based editors struggle to match.

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    Main Process (Bun)

    Handles file I/O, OS integration, and window management with the extreme performance of the Zig-based Bun runtime.

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    Renderer (WebView + React/Milkdown)

    A lightweight native WebView instance hosting a React-powered UI and the Milkdown framework for WYSIWYG editing.

architecture.stack.json 
{
  "core": {
    "runtime": "Bun (1.16.0+)",
    "language": "TypeScript",
    "shell": "Electrobun"
  },
  "ui": {
    "framework": "React 18",
    "styling": "Tailwind CSS",
    "editor": "Milkdown"
  },
  "security": {
    "isolation": true,
    "ipc_bridge": "Secure Context",
    "telemetry": null
  }
}
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MIT License

policy

MarkBun is released under the MIT License. You are free to use, modify, and distribute the software for both personal and commercial projects. Freedom is not just a feature; it's our foundation.

Read the License terms arrow_forward

Contributing

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We welcome contributions of all kinds. Whether you are fixing bugs, proposing new features, or improving documentation, your help makes MarkBun better for everyone.

GitHub Contribution Guide arrow_forward

Need help or want to discuss?

Our community is built around transparency. For support, feature requests, or just to say hi, join us on our GitHub discussion board.