Frontend for GitHub. Edit GitHub files directly in your browser — no server, no database.

日本語ドキュメント

⭐ If PlainHub helps you, please star this repo — your support directly powers new features.

PlainHub is an AI-driven online editor that makes GitHub simple for everyone. No Git knowledge required. Open, edit, save — directly to your repo. Handles huge files with ease. Control GitHub with natural language — just tell the AI what you want. For engineers and non-engineers alike, working together in the same place.

• GitHub-native — All files stay in your GitHub repository. No proprietary server or database required.
• 100% client-side — Runs entirely in your browser. PlainHub never sees your data.
• BYOK (Bring Your Own Key) — Use your own AI API keys (e.g., Anthropic Claude). Keys stay in your browser, never sent to PlainHub servers.
• AI for idea development — Brainstorm, write, and edit alongside an AI assistant. Voice input and TTS read-aloud supported.
• Frontend for GitHub — Like github.dev, but for non-engineers. A notepad with version control built in.

• Markdown 3-mode editing — Code / Visual (WYSIWYG) / Preview
• Syntax highlighting — Markdown, JSON, YAML, and more
• Undo / Redo — Full edit history
• Line numbers, auto-indent, line wrapping — Configurable
• Whitespace visualization — Toggle invisible characters
• Keyboard shortcuts — VS Code-style shortcuts (Ctrl+S, Ctrl+Z, etc.)

• Create / rename / duplicate / delete files and folders
• File history — View past versions with diff
• Sync & conflict resolution — Real-time sync with GitHub
• Image paste — Paste images directly, auto-upload to repo
• Cross-repo search — Search across all your repositories

• CLI — plainhub open <file> -r <repo> from your terminal
• MCP Server — Control from AI IDE (Claude Code, Cursor, VS Code)
• Deep linking — Share URLs with theme, font size, line number settings
• PWA — Install as native app on desktop and mobile

• Dark / Light theme — Automatic or manual
• Mobile responsive — Full-featured on phone and tablet

Visit plainhub.dev and sign in with GitHub.

npm install -g plainhub
plainhub auth --from-gh
plainhub open README.md -r owner/repo

npm install -g plainhub
claude mcp add plainhub -- plainhub-mcp

Then say: "Open the README in owner/repo on PlainHub"

• User Guide — Editor features and shortcuts
• Features — Key features, data ownership, enterprise
• Use Cases — When and how to use PlainHub
• CLI Reference — Terminal commands and options
• MCP Server — AI IDE integration
• FAQ — Troubleshooting and common questions
• 日本語ドキュメント — Japanese documentation

• Report an Issue

• App: app.plainhub.dev
• About: plainhub.dev

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