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JSONLint vs DevToys: catalog facts
JSONLint	DevToys
Free The website is free to use.	Free The open-source software is available without a license fee. Hosting, hardware and…
Web	Windows, macOS, Linux
Validates and pretty-prints in one step Accepts pasted JSON or a URL	Includes text conversion, formatters, encoders and validation tools.
Syntax checking only on the website, no schema validation The related CLI package has not been updated since 2022	Its small utilities do not replace a full development environment.
Web application	Downloadable app
Closed source	Open source
License not stated	License: MIT
No account needed	Not stated if an account is needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 22, 2026

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