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JSON Schema Validator vs JSONLint: catalog facts
JSON Schema Validator	JSONLint
Free Free to use in the browser.	Free The website is free to use.
Web	Web
Supports JSON Schema drafts from 3 through 2020-12 Instant side-by-side schema and input editing	Validates and pretty-prints in one step Accepts pasted JSON or a URL
Validation is done on the server, so the data leaves your machine Only validates; no schema generation or formatting	Syntax checking only on the website, no schema validation The related CLI package has not been updated since 2022
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.