Latest version: Delta Patcher 3.1.6
Released: August 18, 2025
Developer: Marco Calautti
License: Free and open source (GPL-2.0)
Package type: Portable .zip. Extract and run, no installer.
Release info checked: September 14, 2026

Choose your download

Pick the build that matches your computer. If JavaScript is enabled, the build for your system is highlighted below. Every file is a small .zip containing the program and its changelog.

Windows 64-bit

x86-64

Most PCs

File: windows_bin_x86_64.zip
Size: 1.63 MB
Requires: Windows 7 or later

The right choice for almost every Windows 10 and Windows 11 PC.

Download for Windows 64-bit

SHA-256 6fae5d8af839339a9adaf053f30d9444476ee2ca45cb0f38049f7c82ba5c01be

Windows 32-bit

x86

File: windows_bin_x86.zip
Size: 1.47 MB
Requires: Windows 7 or later

Only for 32-bit editions of Windows. It also runs on 64-bit Windows, but there’s no benefit.

Download for Windows 32-bit

SHA-256 447b434dbf0518c92a876b6081c5530dc1cb0730f91b0036016e1c8af15dcb85

macOS

Universal (Apple silicon + Intel)

File: macos11+_bin_universal.zip
Size: 4.09 MB
Requires: macOS 11 Big Sur or later

One app that runs natively on both Apple silicon and Intel Macs.

Download for macOS

SHA-256 a7245b01e0646eefd186bae5c313caab7f2083d908238d9c4b03e3ed86585843

Linux 64-bit (GTK 3)

x86-64

File: linuxGTK3_bin_x86_64.zip
Size: 2.92 MB
Requires: x86-64 Linux with GTK 3 and glibc 2.38 or newer

A single binary that uses your system’s GTK 3 libraries.

Download for Linux 64-bit (GTK 3)

SHA-256 89819df1526ba1d5db9cf70eccda7b963a9a8015d215f23b892f087e569a46dc

Linux via Flathub

x86-64 and ARM64

App ID: io.github.marco_calautti.DeltaPatcher
Updates: Through Flatpak, like any other Flathub app
Requires: Any Linux distribution with Flatpak (x86-64 or ARM64)

Built from the official repository. The best option on older distributions and on ARM Linux.

Open Delta Patcher on Flathub

Install from a terminal

flatpak install flathub io.github.marco_calautti.DeltaPatcher

Which Windows build do I need?

Almost every PC sold in the last decade runs 64-bit Windows, and Windows 11 is 64-bit only. To check:

Open Settings → System → About.
Look at System type. “64-bit operating system” means windows_bin_x86_64.zip; “32-bit operating system” means windows_bin_x86.zip.

Delta Patcher 3.1.6 needs Windows 7 or later. For Windows XP or Vista, the last compatible release is Delta Patcher 3.0.1 (opens external site): version 3.1 made Windows 7 the minimum.

What’s inside each .zip

Contents of the Delta Patcher 3.1.6 downloads
Download	Contents	How you run it
Windows (64-bit or 32-bit)	`DeltaPatcher.exe`, `CHANGELOG.txt`	Extract the .zip, then double-click `DeltaPatcher.exe`
macOS (universal)	`DeltaPatcher.app`, `CHANGELOG.txt`	Move the app to Applications and open it
Linux (GTK 3)	`DeltaPatcher` binary, `CHANGELOG.txt`	Make it executable and run `./DeltaPatcher`

Can’t install software on the machine you’re using? An online patcher applies the same patches in a browser. Otherwise: there’s no installer, no bundled software and no separate xdelta3 download. What the program can do once it opens is covered in the feature guide, and the FAQ answers the usual pre-download questions. The xdelta3 engine is built into the program. The installation guide covers first launch on each system, including SmartScreen and macOS security prompts.

The Delta Patcher window on first launch, showing empty Original file and XDelta patch fields and the Apply patch button — What you get: a single window, no installer and no setup wizard.

Verify your download (optional)

Comparing a file’s SHA-256 checksum with the value on its card confirms the file is exactly what the developer published. Run the command for your system from the folder that contains the .zip:

Windows (PowerShell)

Get-FileHash .\windows_bin_x86_64.zip -Algorithm SHA256

macOS (Terminal)

shasum -a 256 "macos11+_bin_universal.zip"

Linux (Terminal)

sha256sum linuxGTK3_bin_x86_64.zip

Both values are 64 hexadecimal characters, and the check is case-insensitive. If they don’t match, delete the file and download it again from the link above. The same method works for checking the files you patch; see how to verify a source file.

What’s new in Delta Patcher 3.1.6

Released August 18, 2025. Changes listed by the developer:

Fixed bug with paths containing non-ASCII characters on Linux
Updated wxWidgets to official v3.3.1
Updated liblzma to stable v5.8.1

Recent releases

Earlier Delta Patcher releases
Version	Released	Changes
3.1.5 (opens external site)	April 29, 2024	Updated xdelta3 library to v3.1.0 Added support for large files (larger than 4GB)
3.1.4 (opens external site)	January 5, 2024	Fixed button image alignment in modern versions of macOS
3.1.3 (opens external site)	January 4, 2024	Added support for high DPI displays Added support for Flatpak Windows 32 bit is supported again
3.1.2 (opens external site)	December 30, 2023	Log is now hidden by default: patch descriptions are shown in a tooltip when a patch is loaded. For common patching errors (most notably checksum mismatch), a more user friendly message is shown to the user.

The complete history, back to version 1.0 from 2014, is in the official changelog (opens external site).

Older versions

Looking for Delta Patcher Lite? That apply-only edition was merged into the single program in version 3.0.0.

Every previous release stays available on the GitHub releases page (opens external site). There’s rarely a reason to use one: newer versions fixed real problems, including large-file support in 3.1.5 and non-ASCII file paths on Linux in 3.1.6. The main exception is very old Windows, covered above.

Official sources vs. other download sites

Where to get Delta Patcher
Source	Status	What it provides
GitHub releases (opens external site)	Official	Windows, macOS and Linux builds published by the developer
GitHub repository (opens external site)	Official	Source code, changelog and issue tracker
Flathub (opens external site)	Official listing	Linux package built from the official repository
Community listings such as romhacking.net	Third-party listing	Long-standing catalogue entries that may point to older versions than the current release
Other download or “mirror” sites	Not recommended	Copies that may be outdated, repackaged or bundled with other software

If you already have a copy from somewhere else, compare its SHA-256 checksum with the values on this page, or replace it with an official download. Is Delta Patcher safe? covers the warnings you may see and how to spot a repackaged installer.

Weighing it up against other tools? See Delta Patcher alternatives.

Delta Patcher Download