In computing, Xerces is Apache's collection of software libraries for parsing, validating, serializing and manipulating XML.

The library implements a number of standard APIs for XML parsing, including DOM, SAX and SAX2.

The implementation is available in the Java, C++ and Perl programming languages.

The name "Xerces" is believed to commemorate the extinct Xerces blue butterfly (Glaucopsyche xerces).

[1] There are several language versions of the Xerces parser: The features supported by Xerces depend on the language, the Java version having the most features.