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REHex
What it is
REHex is a free, cross-platform hex editor for reverse engineering and other work with binary data. It supports files larger than 1 TB, decodes integer and floating-point values, and displays machine-code disassembly inline. Users can compare complete files or selected regions side by side, highlight and annotate byte ranges, and map virtual addresses. Editing and inspection tools include bit manipulation, checksumming, bitmap visualization, and common text encodings such as ASCII, Unicode, and ISO-8859-X. REHex also imports and exports Intel HEX files. Binary Templates can automatically annotate data, while Lua scripting and plugins extend its functionality. Windows, macOS, and Linux packages are available, including Windows installers and ZIP archives, a macOS DMG, and Linux AppImages. The project identifies its license as GPL-2.0. The download page lists version 0.64.0, released on 2026-04-03, as the latest release; the project invites bug reports and feature suggestions through GitHub issues.
For and against
For
- Free and GPL-2.0 licensed
- Supports files larger than 1 TB
- Compares whole files or selected regions
- Lua scripting and plugins extend functionality
- Imports and exports Intel HEX files
Against
- The project directs bug reports and suggestions to GitHub issues
- Latest listed release is version 0.64.0
The verdict
REHex brings binary editing, comparison, annotation, and analysis features to Windows, macOS, and Linux. Its scripting and plugin support offer ways to extend the free GPL-2.0 application.
Who it suits
REHex suits people working with binary files who need comparison, annotation, scripting, or inline disassembly tools. It is available for Windows, macOS, and Linux.
Plans and prices
REHex
GPL-2.0 licensed · Windows, macOS and Linux packages
Read 30 Sep 2026 · github.com
On the record
- Address mapping
- It supports virtual address mapping.rehex.solemnwarning.net · read 30 Sep 2026
- Analysis
- It can decode integer and floating-point values and display inline machine-code disassembly.rehex.solemnwarning.net · read 30 Sep 2026
- Binary templates
- Binary Templates can automatically annotate data.rehex.solemnwarning.net · read 30 Sep 2026
- Comparison
- It can compare whole files or selections side by side.rehex.solemnwarning.net · read 30 Sep 2026
- Disassembly
- REHex provides inline disassembly of machine code.rehex.solemnwarning.net · read 30 Sep 2026
- Distribution packages
- Packages are documented for Debian, Ubuntu, Fedora, Red Hat Enterprise Linux, FreeBSD and openSUSE.rehex.solemnwarning.net · read 30 Sep 2026
- Editing tools
- REHex provides bit editing and manipulation plus checksumming of files or selections.rehex.solemnwarning.net · read 30 Sep 2026
- Feedback
- The project page asks users to report bugs and suggest improvements or features by opening a GitHub issue.github.com · read 30 Sep 2026
- File comparison
- It supports side-by-side comparison of whole files or selections.rehex.solemnwarning.net · read 30 Sep 2026
- Installers
- Downloads include Windows installers and ZIP archives, a macOS DMG, and 32-bit and 64-bit Linux AppImages.rehex.solemnwarning.net · read 30 Sep 2026
- Intel HEX
- The application can import and export Intel HEX files.rehex.solemnwarning.net · read 30 Sep 2026
- Large files
- It supports files larger than 1 TB.rehex.solemnwarning.net · read 30 Sep 2026
- Latest release
- The download page lists version 0.64.0, released on 2026-04-03, as the latest release.rehex.solemnwarning.net · read 30 Sep 2026
- License
- The GitHub project page identifies the project license as GPL-2.0.github.com · read 30 Sep 2026
- Other features
- It supports byte-range highlighting and annotation, virtual address mapping, common text encodings, Intel HEX import and export, bitmap visualisation, bit editing, and checksumming.rehex.solemnwarning.net · read 30 Sep 2026
- Purpose
- REHex is a cross-platform hex editor for reverse engineering and other uses.rehex.solemnwarning.net · read 30 Sep 2026
- Scripting
- It supports Lua scripting, and its functionality can be extended with Lua plugins.rehex.solemnwarning.net · read 30 Sep 2026
- Support
- The project asks users to report bugs and suggest improvements by opening GitHub issues.github.com · read 30 Sep 2026