TagSoup

TagSoup is a powerful open-source parser written in Java that is specifically designed to parse HTML. Unlike traditional parsers, TagSoup can handle HTML as it is commonly found in the wild - often poorly formatted, nasty, and brutish. However, this doesn't mean that TagSoup isn't capable of handling even the most difficult HTML projects. Thanks to its user-friendly SAX interface, which seamlessly integrates XML tools, industry professionals can process problematic HTML with relative ease.

One of the standout features of TagSoup is its ability to transform messy HTML into a clean, well-formatted compound that functions like XHTML. Its command-line processor can read HTML files, generate cleaner-looking HTML, and output structured XML documents that neatly follow the XHTML standard.

While TagSoup functions primarily as a parser, it isn't designed to be an application. It isn't intended to fix poorly formatted HTML, as applications like HTML Tidy do. Instead, TagSoup is primarily designed to parse HTML in real-time. TagSoup does, however, guarantee properly nested tags, appropriate default attributes, and other well-structured results - all of which saves developers valuable time and efforts.

It's important to note that TagSoup is licensed under the terms of the Apache License, Version 2.0., making it an ideal choice for large-scale software projects. In summary, TagSoup is a comprehensive and robust HTML parser that is an excellent tool for handling common web development tasks, regardless of how messy the HTML might be.