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HTMLHint vs SuperHTML: catalog facts
HTMLHint	SuperHTML
Free Free and open source, supported through Open Collective.	Free Free and open source under the MIT licence.
Windows, macOS, Linux, Command line	Windows, Command line
Rules can be switched on, off or customised per project Runs from the command line or in a build pipeline	Validation and formatting in one tool Works as a language server in editors
Checks HTML only, not CSS or JavaScript Needs Node.js and npm for the command-line version	Focused on HTML only No formal releases listed on the repository
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: MIT
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.