Okteta
Okteta is a free, open-source Linux editor for viewing and changing raw file data.
What Okteta is
Okteta is a free, open-source Linux editor for viewing and changing raw file data. It shows byte values with characters in columns or in rows where each value appears above its character. Editing and navigation follow a text-editor style, with undo and redo available. Multiple files can remain open, and customized data views can be saved as profiles for later loading. Numerical displays include hexadecimal, decimal, octal, and binary, while character options include Qt 8-bit encodings and EBCDIC. The Structures tool analyzes and edits data through structure definitions created by the user. Tools can dock on any side of the window or float separately, and the application lists fast on-screen rendering as a feature. Linux users can install it through AppStream stores, distribution package managers, or Flathub. Okteta is licensed under GPL-2.0 and GPL-3.0, with handbook, forum, and bug-report links available.
Good
- Free open-source software under GPL licenses
- Supports hexadecimal, decimal, octal, and binary views
- Structures tool uses user-created definitions
- Undo and redo support file editing
- Multiple files can stay open
Watch out
- Available on Linux only
- No free trial is listed
- Structure definitions must be created by users
Who it suits
It suits Linux users who need a hex editor for inspecting or editing raw file data. Developers may also value its reusable Qt-based libraries.
Verdict
Okteta provides configurable raw-data views, several encodings, and structure-based editing in a Linux application. Its GPL licensing and installation options suit users seeking open-source tooling.
Plans and prices
From Okteta's own pricing page, checked 11 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Okteta | Free | GPL-2.0 · GPL-3.0 |
The facts
Each one read from Okteta's own pages, with the date it was checked.
What it does
- Availability
- The KDE Applications page lists Linux and links to installation through AppStream stores, distribution package managers, and Flathub.checked 11 Oct 2026
- Byte display
- It displays byte values and characters in columns or in rows with the value above the character.checked 11 Oct 2026
- Editing
- Editing and navigating are similar to a text editor, and the app supports undo and redo.checked 11 Oct 2026
- Encodings
- Numerical encodings include hexadecimal, decimal, octal, and binary; character encodings include Qt's 8-bit encodings and EBCDIC.checked 11 Oct 2026
- Intended users
- The project describes Okteta as a hex editor for viewing and editing raw file data, and says its Qt-based libraries can be reused by developers in their code.checked 11 Oct 2026
- License
- The application page lists GPL-2.0 and GPL-3.0.checked 11 Oct 2026
- Multiple files
- Okteta can have multiple files open.checked 11 Oct 2026
- Performance
- The application lists fast on-screen data rendering as a feature.checked 11 Oct 2026
- Purpose
- Okteta is a simple editor for the raw data of files.checked 11 Oct 2026
- Structures
- Its Structures tool analyzes and edits data using user-creatable structure definitions.checked 11 Oct 2026
- Support
- The page links to the Okteta Handbook and KDE forum for help and to a bug-report page.checked 11 Oct 2026
- Tool layout
- Tools can be docked on any side or displayed as floating windows.checked 11 Oct 2026
- View profiles
- Data views can be customized and their profiles loaded and stored.checked 11 Oct 2026
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