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HTMLHint vs HTML-validate: catalog facts
HTMLHint	HTML-validate
Free Free and open source, supported through Open Collective.	Free Free to use, with the source code published on GitLab.
Windows, macOS, Linux, Command line	Command line
Rules can be switched on, off or customised per project Runs from the command line or in a build pipeline	Validates entirely offline, so no markup is uploaded Handles HTML fragments inside Vue.js and AngularJS components
Checks HTML only, not CSS or JavaScript Needs Node.js and npm for the command-line version	Command-line and tooling oriented, with no graphical interface Checks markup only, not CSS or accessibility in a browser
Downloadable app	Downloadable app
Open source	Closed source
License: MIT	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.