Heimer
Create mind maps, diagrams, and notes with Heimer, a desktop tool targeting Linux and Windows.
About Heimer
Heimer is a free, open-source desktop application for creating mind maps, diagrams, and notes, built with the Qt framework and available for Linux and Windows. It offers an adjustable grid, automatic layout optimization, autosave, full undo/redo, export to PNG and SVG, save/load in XML-based .ALZ files, zoom controls, and support for multiple languages including English, Basque, Chinese, Dutch, Finnish, French, German, Italian, and Spanish.
Key features
- Adjustable grid for diagram customization
- Automatic layout optimization
- Autoload and autosave support
- Export to PNG and SVG formats
- Full undo/redo functionality
- Save/load XML-based .ALZ files
Best for: It is best suited for Linux and Windows users seeking a free, open-source tool for creating mind maps, diagrams, and notes.
Good for
- Free and open-source under GNU GPLv3 license
- Cross-platform support for Linux and Windows
- Supports export to PNG and SVG formats
Watch out for
- Qt 6 support is preliminary
- No native support for macOS, only Linux and Windows
Heimer at a glance
- Website
- github.com/juzzlin/Heimer
- Category
- Software & Utilities › Text Editors
- Type
- Open-source project
- Pricing
- Free
- Platforms
- Linux, Windows
- Open source
- Yes · Source code
- Language
- English
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
Guides for Text Editors
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Heimer FAQ
What operating systems does Heimer support?
Heimer is targeted for Linux and Windows.
What export formats are available for diagrams?
Heimer can export diagrams to PNG and SVG formats.
What license governs Heimer's source code?
Heimer's source code is licensed under GNU GPLv3.
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