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JSONLint vs YAMLlint: catalog facts
JSONLint	YAMLlint
Free The website is free to use.	Free Free to use in the browser.
Web	Web
Validates and pretty-prints in one step Accepts pasted JSON or a URL	Paste-and-check workflow with no setup Returns a cleaned UTF-8 version of valid YAML
Syntax checking only on the website, no schema validation The related CLI package has not been updated since 2022	Reformatting strips comments No schema or style rules, only syntax checking
Web application	Web application
Closed source	Closed source
License not stated	License not stated
No account needed	No account needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

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