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JSONLint vs OK JSON: catalog facts
JSONLint	OK JSON
Free The website is free to use.	Paid Sold through the Mac App Store and as a direct download; the research does not list the…
Web	macOS
Validates and pretty-prints in one step Accepts pasted JSON or a URL	Opens clipboard JSON instantly, even when malformed jq, JSONPath and JavaScript queries built in
Syntax checking only on the website, no schema validation The related CLI package has not been updated since 2022	macOS only Pricing not stated on the homepage
Web application	Downloadable app
Closed source	Closed source
License not stated	License not stated
No account needed	No account needed
Needs internet	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 1, 2026

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