Tidy

The granddaddy of HTML tools. Supports modern standards. Thanks to the efforts of HTACG and prominent contributors, HTML Tidy has a whole new heartbeat and a whole new life. Tidy tidies HTML and XML. It can tidy your documents by itself, and developers can easily integrate its features into even more powerful tools. Tidy is a console application for macOS, Linux, Windows, UNIX, and more. It corrects and cleans up HTML and XML documents by fixing markup errors and upgrading legacy code to modern standards. libtidy is a C static and dynamic library that developers can integrate into their applications in order to bring all of Tidy’s power to your favorite tools. libtidy is used today in desktop applications, web servers, and more. The HTML Tidy library, libtidy, is used and incorporated into many applications and projects. It offers an extensive API to read in and parse HTML from a file or buffer into a DOM-like node tree, has cleaning and diagnostic services, etc.