Compare software

JSON Formatter vs JSONLint: catalog facts
JSON Formatter	JSONLint
Free Free and open source.	Free The website is free to use.
Browser extension	Web
Collapsible trees with indent guides and syntax highlighting Toggle between raw and parsed JSON	Validates and pretty-prints in one step Accepts pasted JSON or a URL
Built as a Chrome extension; other browsers are not mentioned Viewing only, not a JSON editor	Syntax checking only on the website, no schema validation The related CLI package has not been updated since 2022
Browser extension	Web application
Open source	Closed source
License not stated	License not stated
No account needed	No account needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 23, 2026

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