14 verified answers
Delta Patcher frequently asked questions
Direct answers about supported files, platform builds, checksums, large files, source code, and what this website does not provide.
01What does Delta Patcher do?
Delta Patcher is a desktop application that creates and applies xdelta patches. Applying a patch transforms an original file; creating a patch records the differences between an original and a modified file.
02Which patch formats does Delta Patcher support?
Delta Patcher creates and applies xdelta patches. If your patch uses another format, check the instructions included with it to find the patching program you need.
03Is Delta Patcher only for ROM files?
No. Delta Patcher works with files generally; it is not limited to ROMs or game files. The source and patch still need to be compatible with each other.
04Which operating systems have current downloads?
Current release assets are available for Windows, macOS, and GTK3-based Linux systems.
05Which Windows build should I download?
Choose the 64-bit x86-64 build for most current Windows PCs. Use the 32-bit x86 build only when your Windows installation is 32-bit.
06Does the macOS download support Apple silicon and Intel?
Yes. The current macOS 11+ download works on both Apple silicon and Intel Macs.
07Does Delta Patcher need a separate xdelta3 installation?
No. Delta Patcher embeds xdelta3 as a library, so a separate xdelta3 command-line installation is not required.
08What files do I need to apply an xdelta patch?
You need the original file expected by the patch and the matching .xdelta patch file. Follow the patch author’s instructions for the required source-file version.
09What does a checksum mismatch mean?
It usually means the selected original file does not match the file expected by the patch. Check the patch author’s instructions, file version, region, or prior modifications before changing validation settings.
10Can Delta Patcher work with files larger than 4 GB?
Yes. Large-file support above 4 GB was added in Delta Patcher v3.1.5.
11Can Delta Patcher create patches as well as apply them?
Yes. Create mode compares an original file with a modified file and writes the differences to an xdelta patch.
12Does DeltaPatcher.net provide ROMs or game files?
No. This website provides software information and links to the project’s GitHub downloads; it does not host or provide copyrighted ROMs or game files.
13Where can I find older releases?
The Changelog summarizes earlier versions and links to the complete project release archive.
14Is the source code available?
Yes. Delta Patcher is open-source software distributed under GPL-2.0, with the source repository and release snapshots available on GitHub.
Next step