Open-source xdelta patcher

Delta Patcher — a desktop app for xdelta patches

Delta Patcher is an open-source desktop app for creating and applying .xdelta patches on Windows, macOS, and Linux—without a separate command-line setup.

Download Delta Patcher See how it works

Windows · macOS · Linux

No installation needed

Prefer to patch directly in your browser?

Use the browser tool for a quick local workflow. Your selected files stay on your device while the patch is applied or created.

Xdelta Patcher Online

Two core tasks

Apply a patch or create one

Delta Patcher puts both sides of the xdelta workflow in one application.

Workflow illustrationOne interface, two directions

01Apply

Originalsource file.xdeltapatchPatchedoutput file

02Create

Originalsource fileModifiedchanged file.xdeltanew patch

Supported format

Built for xdelta patches

Delta Patcher creates and applies .xdelta patches to files generally. It is not limited to ROM files, but the patch and original file must still match.

Delta Patcher is made for xdelta patches. If your patch uses another format, check the instructions that came with it to find the patching program you need.

Read the format FAQ

Practical controls

Useful options without a separate command line

Embedded xdelta3

The xdelta3 engine is integrated into the application; there is no separate executable to configure.

Validation and backup

Checksum checking helps detect a mismatched source file, while an optional backup can preserve the original.

Large-file support

Current releases can process files larger than 4 GB.

Creation controls

Choose compression, secondary compression, source window, checksum, and a patch description when needed.

Understand the creation options

Desktop builds

Available for the systems you already use

The Download page explains which file fits your computer.

Compare current builds

WIN

Windows

64-bit x86-64 and 32-bit x86 archives.

MAC

macOS 11+

One download for Apple silicon and Intel Macs.

LNX

Linux

GTK3 build for 64-bit x86-64 systems.

Clear answers

Common questions

Which patch formats does Delta Patcher support?

Delta Patcher creates and applies xdelta patches. For another patch format, use the program named in the patch instructions.

Is Delta Patcher only for ROM files?

No. It can patch arbitrary compatible files; ROMs are only one possible use.

Which operating systems have current downloads?

Current builds cover Windows, macOS 11+, and 64-bit GTK3 Linux.

Does DeltaPatcher.net provide ROMs or game files?

No. The site provides software documentation and release links, not ROMs or game files.

View all FAQs