Clone this repo:
  1. 054e46b Restore behavior of htmlDocContentDumpFormatOutput() by David Kilzer · 3 days ago main master upstream/master
  2. e08d8c3 Add xptr_locs flag to win32/configure.js by Joey Arhar · 11 days ago
  3. c1632fb fix typo in comment by Mehltretter Karl · 12 days ago
  4. e9270ef fix Schematron spelling by Mehltretter Karl · 12 days ago
  5. 6c283d8 [CVE-2022-29824] Fix integer overflows in xmlBuf and xmlBuffer by Nick Wellnhofer · 2 weeks ago


libxml2 is an XML toolkit implemented in C, originally developed for the GNOME Project.

Full documentation is available at

Bugs should be reported at

A mailing list is available. You can subscribe at The list archive is at


This code is released under the MIT License, see the Copyright file.

Build instructions

libxml2 can be built with GNU Autotools, CMake, or several other build systems in platform-specific subdirectories.

Autotools (for POSIX systems like Linux, BSD, macOS)

If you build from a Git tree, you have to install Autotools and start by generating the configuration files with:


If you build from a source tarball, extract the archive with:

tar xf libxml2-xxx.tar.gz
cd libxml2-xxx

To see a list of build options:

./configure --help

Also see the INSTALL file for additional instructions. Then you can configure and build the library:

./configure [possible options]

Note that by default, no optimization options are used. You have to enable them manually, for example with:

CFLAGS='-O2 -fno-semantic-interposition' ./configure

Now you can run the test suite with:

make check

Please report test failures to the mailing list or bug tracker.

Then you can install the library:

make install

At that point you may have to rerun ldconfig or a similar utility to update your list of installed shared libs.

CMake (mainly for Windows)

Another option for compiling libxml is using CMake:

cmake -E tar xf libxml2-xxx.tar.gz
cmake -S libxml2-xxx -B libxml2-xxx-build [possible options]
cmake --build libxml2-xxx-build
cmake --install libxml2-xxx-build

Common CMake options include:

-D BUILD_SHARED_LIBS=OFF            # build static libraries
-D CMAKE_BUILD_TYPE=Release         # specify build type
-D CMAKE_INSTALL_PREFIX=/usr/local  # specify the install path
-D LIBXML2_WITH_ICONV=OFF           # disable iconv
-D LIBXML2_WITH_LZMA=OFF            # disable liblzma
-D LIBXML2_WITH_PYTHON=OFF          # disable Python
-D LIBXML2_WITH_ZLIB=OFF            # disable libz

You can also open the libxml source directory with its CMakeLists.txt directly in various IDEs such as CLion, QtCreator, or Visual Studio.


Libxml does not require any other libraries. A platform with somewhat recent POSIX support should be sufficient (please report any violation to this rule you may find).

However, if found at configuration time, libxml will detect and use the following libraries:

  • libz, a highly portable and widely available compression library.
  • liblzma, another compression library.
  • libiconv, a character encoding conversion library. The iconv function is part of POSIX.1-2001, so libiconv isn't required on modern UNIX-like systems like Linux, BSD or macOS.
  • ICU, a Unicode library. Mainly useful as an alternative to iconv on Windows. Unnecessary on most other systems.


The current version of the code can be found in GNOME's GitLab at at The best way to get involved is by creating issues and merge requests on GitLab. Alternatively, you can start discussions and send patches to the mailing list. If you want to work with patches, please format them with git-format-patch and use plain text attachments.

All code must conform to C89 and pass the GitLab CI tests. Add regression tests if possible.


  • Daniel Veillard
  • Bjorn Reese
  • William Brack
  • Igor Zlatkovic for the Windows port
  • Aleksey Sanin
  • Nick Wellnhofer