HTML Tidy

{{Article for deletion/dated|page=HTML Tidy|timestamp=20260522143841|year=2026|month=May|day=22|substed=yes}}   {{short description|Application for correcting invalid HTML}} {{Refimprove|date=August 2012}} {{Infobox software | logo =  | screenshot =  | caption = | collapsible = | author = Dave Raggett | developer = HTML Tidy Advocacy Community Group | released =  | discontinued = | latest release version = {{wikidata|property|reference|P348}} | latest release date = {{start date and age|{{wikidata|qualifier|P348|P577}}}} | programming language = C | operating system = {{#statements:operating system}} | platform = | size = | language = | genre = Library, Console Application | license = {{#statements:copyright license}} }} '''HTML Tidy''' is a console application for correcting invalid HyperText Markup Language (HTML), detecting potential web accessibility errors, and for improving the layout and indent style of the resulting markup. It is also a cross-platform library for computer applications that provides HTML Tidy's features.

==History== HTML Tidy was developed by Dave Raggett<ref>{{cite web | url=https://www.w3.org/People/Raggett/tidy/ | title=Clean up your Web pages with HTML TIDY | first=Dave | last=Raggett | work=W3C.org | access-date=2015-02-12}} (Dave Raggett's legacy HTML Tidy page.)</ref> of the World Wide Web Consortium (W3C). Later it was released as a SourceForge project in 2003 and managed by various maintainers.<ref>{{cite web|url=https://tidy.cvs.sourceforge.net/tidy/ |title=SourceForge.net Repository - [tidy] Index of / |publisher=Tidy.cvs.sourceforge.net |access-date=2015-04-25}}</ref>

In 2012, the project was moved to GitHub,<ref>{{github|w3c/tidy-html5}}</ref> and maintained by Michael Smith, also of W3C,<ref>{{cite web | url=https://people.w3.org/mike//| title=Michael[tm] Smith | first=Michael | last=Smith | work=W3C.org | access-date=2015-02-12}}</ref> where HTML5 support was added.

In 2015, the HTML Tidy Advocacy Community Group (HTACG) was formed for management and development of HTML Tidy as a W3C Community Group.<ref>{{cite web|url=http://www.htacg.org |title=HTACG |publisher=HTACG.org |access-date=2015-04-25}}</ref><ref>{{cite web|author=Jim Derry |url=https://www.w3.org/community/htacg/ |title=HTML Tidy Advocacy Community Group |date=15 January 2015 |publisher=W3.org |access-date=2015-04-25}}</ref>

HTML Tidy source code is written in ANSI C for portability. Compiled binary files are available for a variety of platforms. It is available under the W3C Software Notice and License, a permissive BSD-style license. Up-to-date versions are available as source code cloned from its GitHub Git version control repository, or in binary packages for multiple operating systems from its GitHub Releases repository.

==Features==

Examples of corrections to invalid or poorly constructed HTML: * Reorder mixed-up tags * Complete missing or mismatched end tags * Add missing syntax elements (some tags, quotes, etc.) * Report proprietary HTML extensions * Change layout of markup to a predefined style * Transform characters from some encodings into HTML entities

==See also== {{Portal|Free and open-source software}} * Comparison of HTML parsers

==References== {{Reflist|30em}}

==External links== * [http://www.html-tidy.org/ HTML Tidy Project Page] * [https://github.com/htacg/tidy-html5 Current Source Code] * [https://github.com/htacg/tidy-html5/releases Official Binary Releases] * [https://tidy.sourceforge.net/ HTML Tidy Project Page] (legacy) * [https://cgi.w3.org/cgi-bin/tidy HTML Tidy service] * [https://gtidy.netlify.app/ GTidy - A GUI for HTML Tidy] {{Webarchive|url=https://web.archive.org/web/20021003090153/http://cgi.w3.org/cgi-bin/tidy |date=2002-10-03 }} Was an online version of HTML Tidy at the W3C. The W3C online tidy service was decommissioned on 29 November, 2017.

Category:Free software programmed in C Category:HTML editors Category:Software using the W3C Software Notice and License