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REHex

rehex.solemnwarning.net

Free plan WindowsmacOSLinux
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Spec score 7.8 #12 of 32 in Hex Editors

What it is

REHex is a free hex editor for reverse engineering and other work with binary data, available for Linux, macOS and Windows. It supports files larger than 1 TB, decodes integer and floating-point values, and displays machine-code disassembly inline. Users can compare whole files or selected regions side by side, map virtual addresses, and highlight or annotate byte ranges. Editing and analysis tools include bit editing, checksumming and bitmap visualization, along with common encodings such as ASCII, Unicode and ISO-8859-X. REHex imports and exports Intel HEX files. Binary Templates can annotate data automatically, while Lua scripting and plugins extend its functionality. Downloads include Windows installers and ZIP archives, a macOS DMG, and 32-bit and 64-bit Linux AppImages; packages are also documented for Debian, Ubuntu, Fedora, Red Hat Enterprise Linux, FreeBSD and openSUSE. 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. Bug reports and feature suggestions can be submitted as GitHub issues.

Spec sheet

Purpose
REHex is a cross-platform hex editor for reverse engineering and other uses.Read 30 Sep 2026 · rehex.solemnwarning.net
Platforms
The download page offers releases for Windows, macOS, and Linux, plus packages for Debian, Ubuntu, Fedora, Red Hat Enterprise Linux, FreeBSD, and openSUSE.Read 30 Sep 2026 · rehex.solemnwarning.net
Support
The project asks users to report bugs and suggest improvements by opening GitHub issues.Read 30 Sep 2026 · github.com
License
The GitHub project page identifies the project license as GPL-2.0.Read 30 Sep 2026 · github.com
Address mapping
It supports virtual address mapping.Read 30 Sep 2026 · rehex.solemnwarning.net
Analysis
It can decode integer and floating-point values and display inline machine-code disassembly.Read 30 Sep 2026 · rehex.solemnwarning.net
Binary templates
Binary Templates can automatically annotate data.Read 30 Sep 2026 · rehex.solemnwarning.net
Comparison
It can compare whole files or selections side by side.Read 30 Sep 2026 · rehex.solemnwarning.net
Disassembly
REHex provides inline disassembly of machine code.Read 30 Sep 2026 · rehex.solemnwarning.net
Distribution packages
Packages are documented for Debian, Ubuntu, Fedora, Red Hat Enterprise Linux, FreeBSD and openSUSE.Read 30 Sep 2026 · rehex.solemnwarning.net
Editing tools
REHex provides bit editing and manipulation plus checksumming of files or selections.Read 30 Sep 2026 · rehex.solemnwarning.net
Feedback
The project page asks users to report bugs and suggest improvements or features by opening a GitHub issue.Read 30 Sep 2026 · github.com
File comparison
It supports side-by-side comparison of whole files or selections.Read 30 Sep 2026 · rehex.solemnwarning.net
Installers
Downloads include Windows installers and ZIP archives, a macOS DMG, and 32-bit and 64-bit Linux AppImages.Read 30 Sep 2026 · rehex.solemnwarning.net
Intel HEX
The application can import and export Intel HEX files.Read 30 Sep 2026 · rehex.solemnwarning.net
Large files
It supports files larger than 1 TB.Read 30 Sep 2026 · rehex.solemnwarning.net
Latest release
The download page lists version 0.64.0, released on 2026-04-03, as the latest release.Read 30 Sep 2026 · rehex.solemnwarning.net
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.Read 30 Sep 2026 · rehex.solemnwarning.net
Scripting
It supports Lua scripting, and its functionality can be extended with Lua plugins.Read 30 Sep 2026 · rehex.solemnwarning.net
Text encodings
It supports common encodings including ASCII, Unicode and ISO-8859-X.Read 30 Sep 2026 · rehex.solemnwarning.net

Plans and prices

REHex Free GPL-2.0 licensed · Windows, macOS and Linux packages Read 30 Sep 2026 · github.com

Every REHex plan and price →

Strong points and limits

Strong points

  • Free and GPL-2.0 licensed.
  • Supports files larger than 1 TB.
  • Compares whole files or selected regions.
  • Lua scripting and plugins are supported.
  • Offers Windows, macOS and Linux packages.

Limits

  • The latest listed release is version 0.64.0.
  • The latest listed release date is 2026-04-03.

Who it suits

REHex suits people working with binary data for reverse engineering or other purposes, particularly those who need file comparison, disassembly or scripting. Its platform packages cover Windows, macOS and Linux.

Verdict

REHex combines large-file support with comparison, disassembly and scripting tools across three desktop platforms. Its project identifies the software as GPL-2.0 licensed.

Where Specifiction places it

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