unhexo is a modern, free and open-source hex editor.
Primary development happens on Codeberg. A GitHub repository is provided as a read-only mirror for visibility purposes.
Please report issues and open pull requests on Codeberg.
unhexo is in early development.
The project is still experimental and design, features, and behavior may change frequently.
Features currently planned or under development:
- Hex file reading
- Chunked file reading (large files)
- Tabs and workspaces
- Persist state in local storage
- Workspaces track closed tabs
- File comparison
- Theming
- Visual Studio Code
- Obsidian
- Notion (desktop)
Yes.
In my tests, a 33GB file opened instantly.
No full file loading — just opening… something very big.
(≧◡≦)
33GB?
In this hex editor?
Yeah… so big... it fits. (⁄ ⁄•⁄ω⁄•⁄ ⁄)
(≖‿≖)
Unhexo is free software licensed under the GNU General Public License version 3 (GPL-3.0-only).
Copyright (C) 2026 Igor S. Zizinio
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, version 3 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.