The JSON Formatter was created to help with debugging. As JSON data is often output without line breaks to save space, it is extremely difficult to actually read and make sense of it. This little tool hoped to solve the problem by formatting the JSON data so that it is easy to read and debug by human beings.
Shortly after it was created, JSON validation was added following the description set out by Douglas Crockford of json.org in RFC 4627. It has since been expanded to also validate both current competing JSON standards RFC 7159 and ECMA-404.
Install the JSON Formatter & Validator Bookmarklet to quickly and easily format and validate any public JSON URL with a single click.
Format & Validate JSON
To install, just drag the button above into your bookmarks toolbar.
Although you are in no way obligated, some users have requested a way to support the project.
A big thank you goes out to all the donors who have already contributed. Your kindness is very much appreciated.
Over the years the JSON Formatter & Validator has been immensely improved through the feedback and suggestions of its users. We encourage you to continue to pass along any new recommendations, requests or bug reports.