Expat (software)

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Expat
Original author(s)	James Clark
Developer(s)	Clark Cooper, et al.
Initial release	1998; 27 years ago (1998)
Stable release	2.7.1[1]  / 27 March 2025; 3 months ago (27 March 2025)
Repository	github.com/libexpat/libexpat
Written in	C
Operating system	Portable
Type	XML parser library
License	MIT License[2]
Website	libexpat.github.io

Expat is a stream-oriented XML 1.0 parser library, written in C, more precisely C99.^[3] As one of the first available open-source XML parsers, Expat has found a place in many open-source projects. Such projects include the Apache HTTP Server, Mozilla, Perl, Python and PHP. It is also bound in many other languages.