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HTML parsers are software for automated Hypertext Markup Language (HTML) parsing. They have two main purposes:
HTML traversal: offer an interface for programmers to easily access and modify the "HTML string code". Canonical example: DOM parsers.
HTML clean: to fix invalid HTML and to improve the layout and indent style of the resulting markup. Canonical example: HTML Tidy.
Parser
License
Implementation language(s)
Latest date*
HTML parsing[1]
HTML5-compliant parsing
Clean HTML**
Update HTML***
HTML Tidy
W3C license
ANSI C
2021-07-17[2]
Yes[3]
Yes
Yes[3]
Yes
HtmlUnit
Apache License 2.0
Java
2023-10-31[4]
Yes
?
No
No
Beautiful Soup
MIT License
Python
2023-04-07[5]
Yes
Yes
?
No
jsoup
MIT License
Java
2023-12-29[6]
Yes
Yes
Yes
Yes
Parser
License
Implementation language(s)
Latest date*
HTML Parsing
HTML5-compliant Parsing
Clean HTML**
Update HTML***
* Latest release (of significant changes) date.
** sanitize (generating standard-compatible web-page, reduce spam, etc.) and clean (strip out surplus presentational tags, remove XSS code, etc.) HTML code.
*** Updates HTML4.X to XHTML or to HTML5, converting deprecated tags (ex. CENTER) to valid ones (ex. DIV with style="text-align:center;").
^12.2 Parsing HTML documents — HTML Standard Archived 2013-01-16 at the Wayback Machine
^HTML Tidy release 5.8.0
^ abWhat is Tidy?
^HtmlUnit 3.7.0
^Beautiful Soup release 4.10
^jsoup Java HTML Parser release 1.17.2
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