CSS HTML Validator

CSS HTML Validator
Developer(s)AI Internet Solutions LLC
Stable release
2024 (v24.03) / June 24, 2024; 4 months ago (2024-06-24)
Operating systemWindows 10 and later
TypeHTML editor
LicenseTrialware
Websitewww.htmlvalidator.com

CSS HTML Validator (previously named CSE HTML Validator) is an HTML editor and CSS editor for Windows (and Linux when used with Wine) that helps web developers create syntactically correct and accessible HTML/HTML5, XHTML, and CSS documents by locating errors, potential problems like browser compatibility issues, and common mistakes. It is also able to check links, check spelling, suggest improvements, alert developers to deprecated, obsolete, or proprietary tags, attributes, and CSS properties, and find issues that can affect search engine optimization.

CSS HTML Validator is developed, marketed, and sold by AI Internet Solutions LLC located in Texas.[1] The first version of CSS HTML Validator was released in 1997 for Windows 95. The current version is 2024/v24.03[2] (as of June 24, 2024) and is for Windows 10 and above, including Windows 11. A native macOS and Linux command line version (called htmlval) became available with version 23. There are four main editions of CSS HTML Validator — Enterprise, Pro/Professional, Home/Standard, and Lite. While the application is generally a commercial product (except for the Lite edition), a free version of the Home edition is available for personal/educational, non-commercial use. A free limited version of the htmlval command line tool for macOS and Linux is also available.