JSON.fr

This is a web-based and fully client-side JSON validator and formatter, without any server dependencies. It means that no data is ever being transmitted to our server, and it can safely be used to validate private data.

JSON (JavaScript Object Notation) is a lightweight data-interchange format. For more information, please refer to the specification.


This site is maintained by Frederic Cambus. The JSON parser and validator was created by Zach Carter.

For updates, follow @fcambus on


Valid HTML5 and CSS3