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json is a fast CLI tool for working with JSON. It is a single-file node.js script with no external deps (other than node.js itself). A quick taste:

$ echo '{"foo":"bar"}' | json
{
  "foo": "bar"
}

$ echo '{"foo":"bar"}' | json foo
bar

$ echo '{"fred":{"age":42}}' | json fred.age    # '.' for property access
42

$ echo '{"age":10}' | json -e 'this.age++'
{
  "age": 11
}

# `json -ga` (g == group, a == array) for streaming mode
$ echo '{"latency":32,"req":"POST /widgets"}
{"latency":10,"req":"GET /ping"}
' | json -gac 'this.latency > 10' req
POST /widgets

Features:

See https://trentm.com/json for full docs and examples as a man page.

Follow <a href="https://twitter.com/intent/user?screen_name=trentmick" target="_blank">@trentmick</a> for updates to json.

Installation

  1. Get node.

  2. npm install -g json

    Note: This used to be called 'jsontool' in the npm registry, but as of version 8.0.0 it has taken over the 'json' name. See npm Package Name below.

OR manually:

  1. Get the 'json' script and put it on your PATH somewhere (it is a single file with no external dependencies). For example:

     cd ~/bin
 curl -L https://github.com/trentm/json/raw/master/lib/json.js > json
 chmod 755 json

You should now have "json" on your PATH:

$ json --version
json 9.0.0

WARNING for Ubuntu/Debian users: There is a current bug in Debian stable such that "apt-get install nodejs" installed a nodejs binary instead of a node binary. You'll either need to create a symlink for node, change the json command's shebang line to "#!/usr/bin/env nodejs" or use chrislea's PPA as discussed on issue #56. You can also do "apt-get install nodejs-legacy" to install symlink for node with apt.

Test suite

npm test   # or 'make test'

This is using node-tap, so you can use all its options, for example filtering which tests to run:

npm test -- -g stream

License

MIT (see the fine LICENSE.txt file).

Module Usage

Since v1.3.1 you can use "json" as a node.js module:

var json = require('json');

However, so far the module API isn't that useful and the CLI is the primary focus.

npm Package Name

Once upon a time, json was a different thing (see zpoley's json-command here), and this module was called jsontool in npm. As of version 8.0.0 of this module, npm install json means this tool.

If you see documentation referring to jsontool, it is most likely referring to this module.

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