About this extension

Firefox has a built in JSON viewer, but it didn't always. JSONView was built to display JSON documents in an easy to read format, which is still nice if you don't like the default viewer. The document is formatted, highlighted, and arrays and objects can be collapsed. Even if the JSON document contains errors, JSONView will still show the raw text.
Once you've got JSONView installed, check out http://jsonview.com/example.json to see the extension in action!

Developer comments

Known bugs:
* "Save as..." saves HTML instead of the original JSON document.
* "Page Info" panel reports content as HTML instead of JSON.
* Copying and pasting from the formatted JSON does not copy the original document.

Rate your experience

Report this add-on

Release notes for 3.0.2

Fixed a regression in Firefox where JSON not served as UTF-8 (which is technically invalid) caused ugly characters to display in the formatted JSON.

Used by