JSONovich by Will Elwood, mjgiarlo

Pretty-prints JSON content in the browser for easy, unobtrusive viewing.

4.5 (52 reviews)

595 Users

You'll need Firefox to use this extension

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About this extension

JSONovich pretty-prints JSON content of various types directly in a browser tab. It uses the browser's native JSON parser and a custom-built formatter to produce its output.

Normally, the browser would either prompt to download or display as plain text any JSON sent with the correct application/json mime-type. JSONovich makes working with and debugging output from web services easier by formatting JSON nicely inside the browser.

Developer comments

Features

Syntax highlighting of JSON elements. [since 0.1]
Indentation according to JSON object/array nesting level. [since 0.1]
Line numbering based on JSON nodes and brackets, long strings always count as a single line. [since 0.8]
Collapsible objects and arrays (whole line is clickable, not just a tiny +/- symbol). [since 1.5]
Subtle zebra-stripes for easier reading. [since 1.7]
Preserves formatting accurately when copying to clipboard, excluding line numbers. [since 0.9, broken in 1.7, fixed in 1.9.3]
Currently supports the following MIME types by default:
- application/json [since 0.1] (also legacy unofficial types application/x-json [since 1.8.2], text/json [since 1.8.2] and text/x-json [since 0.1])
- application/jsonrequest [since 1.6]
- application/sparql-results+json [since 0.9.1]
- application/schema+json [since 1.8.2]
- application/jsonml+json [since 1.8.2]
- application/rdf+json [since 1.4]
- application/javascript and variations [since 1.9.2]
- application/manifest+json [since 1.99.4]
The above list is customisable by user preferences. [since 1.8.2]
Supports loading JSON from files on disk with the following extensions by default:
- .json [since 1.8]
- .srj [since 1.8.2]
The above list is customisable by user preferences. [since 1.8.2]
Can override the default HTTP Accept header to either remove application/json or add it with a specific quality factor. [hosts since 1.9, URL match patterns since 1.99.4]
Options can be changed via the Add-ons Manager in Firefox 7+, Mobile 7+ and SeaMonkey 2.4+. [since 1.9]
Full support for documents served with unusual character sets as well as the official UTF8. [fixed in 1.9]

Testing

See it in action by trying some of the endpoints at JSON Test.

FAQ

What's with the weird name?
JSONovich is named after Pavement member Bob Nastanovich primarily because he seems like a swell guy.
And the logo?
That's called an Ambihelical Hexnut, an optical illusion similar to the impossible torus that is the JSON logo.

Bugs

To report a problem, please create an issue.

Translation

Feel free to add your language and send a pull request.

Development

A history of changes and the latest source code are available from our GitHub project.

Rated 4.5 by 52 reviewers

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