open-source binary diff, delta/differential compression tools, VCDIFF/RFC 3284 delta compression
C++ C M4 Go Objective-C Makefile Other
Latest commit a089d04 May 7, 2016 @jmacd Enable WINE tests


Xdelta version 3 is a C library and command-line tool for delta compression using VCDIFF/RFC 3284 streams.


This repository contains branches of Xdelta 3.x that were re-licensed by the original author under the Apache Public License version 2.0, namely:

  • release3_0_apl Change to APL based on 3.0.11 sources
  • release3_1_apl Merges release3_0_apl with 3.1.0 sources

The original GPL licensed Xdelta lives at


See the command-line usage. See wiki directory.