A fast, cross-platform code editor with built-in AI agents, Git integration, and an embedded terminal. Built on Notepad Next (a Notepad++ reimplementation in Qt/C++).
- AI Agent Integration — Chat with Claude Code, Gemini, or any ACP-compatible agent directly inside the editor. Agents can read/write files, run terminal commands, and understand your workspace context.
- Git Integration — Inline blame, gutter diff indicators, commit history viewer, staging/unstaging, branch picker, and file-tree decorations. No external Git GUI needed.
- Embedded Terminal — Full PTY terminal with mouse reporting, image passthrough, and persistent task registry. Open terminals in workspace or file directory.
- Notepad++ Compatibility — Familiar tabbed interface, syntax highlighting for 80+ languages via Scintilla/Lexilla, macro recording, session management, and Notepad++ config import.
- Lightweight & Fast — Native C++20/Qt 6 with zero-copy hot paths, precompiled headers, and Control Flow Guard. Starts in milliseconds.
- Cross-platform — Windows, Linux (AppImage), and macOS (dmg).
Download binaries from the Releases page.
| Platform | Format |
|---|---|
| Windows | Installer (.exe) or portable zip |
| Linux | AppImage |
| macOS | Disk image (.dmg) |
Requirements: CMake 3.21+, Qt 6.5+, Ninja, a C++20 compiler (MSVC, GCC, or Clang).
cmake -S . -B build -G Ninja -DCMAKE_BUILD_TYPE=Release
cmake --build build --parallelSee doc/Building.md for platform-specific details.
NotepadAI speaks the Agent Client Protocol (ACP) over stdio. The default built-in agent is Claude Code. Add custom agents via Settings with any command that implements ACP's JSON-RPC 2.0 wire format.
Based on Notepad Next by Justin Dailey. AI and Git extensions by nullmastermind.