A Python and PHP implementations of a HTML parser based on the WHATWG HTML5 specification for maximum compatibility with major desktop web browsers.

Note that the separate ports are not kept in sync; they are effectively different projects offering similar functionality for their respective languages.

Notes

• Users of the sanitizer must ensure that they serialize with quoted attribute values to avoid some known script injection holes in older browsers including IE < 8

• The Ruby port is currently unmaintained

Python 0.90 Release Features

• Parses valid and invalid HTML documents to a tree
• Support for minidom, ElementTree (including cElementTree and lxml.etree), BeautifulSoup (deprecated) and custom simpletree output formats
• DOM to SAX converter
• Reports parse errors
• Character encoding detection
• Filtering and serializing of trees
• HTML+CSS sanitizer
• Many unit tests

Documentation

Using HTML5Lib

Getting help/getting involved

• IRC: the #whatwg channel on the Freenode IRC server
• html5lib-discuss mailing list.