Delta Patcher is a free desktop application for creating and applying xdelta patches to files. In create mode, it records the differences between an original file and a modified file in a new patch. To apply a patch, it uses the original file expected by that patch and its matching .xdelta file to make a patched output. The application includes the xdelta3 engine, so there is no need to install that command-line program separately. Checksum validation can help identify a source file that does not match, and users can opt to keep a backup of the original. Creation settings include compression level, secondary compression, source window, checksum and an optional description. Version 3.1.5 added support for files larger than 4 GB. Delta Patcher is open source under GPL-2.0 and runs on Linux, macOS and Windows. Downloads are GitHub-hosted ZIP archives rather than a separate installer; the project directs users to GitHub for issues, discussions, source code and releases.
Who it is for
It suits people who need to create or apply xdelta patches on Linux, macOS or Windows. Users working with another patch format will need a different program.
What is good
- Free and open source under GPL-2.0.
- Embedded xdelta3 engine needs no separate installation.
- Checksum validation can detect a mismatched source file.
- Can preserve a backup of the original.
- Supports files larger than 4 GB.
What to know first
- Supports xdelta patches only.
- The original file must match the patch.
- Downloads are ZIP archives without a separate installer.
- No command-line support.
Verdict
Delta Patcher covers both xdelta patch creation and application, with checksum validation and optional original-file backup. Its format support is limited to xdelta, and the matching source file is required.
Compared on ROM patching software
- Free plan
- Yes
- Patch formats
- .xdelta
- Supported platforms
- cross_platform
- Checksum verification
- Yes
- Original backup
- Yes
- Command-line support
- No
