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Validate JSON files from grunt.


Validate JSON files from grunt.

Requires grunt 0.4


npm install grunt-jsonlint --save-dev


Add the following (multi-)task to your Gruntfile:

jsonlint: {
  sample: {
    src: [ 'some/valid.json' ]

Add the following to load the task into your Gruntfile:


An error will be thrown if the JSON file contains syntax errors.

Here's a simple tutorial on how to use grunt-jsonlint


The underlying jsonlint library has many features not yet exposed. Each of these would be valuable in grunt.

  • Schema validation
  • Sort file by key

Running tests

Unit tests are provided for automated regression testing. The easiest way to run them is with

$ npm install
$ npm test

Alternatively, if you have grunt-cli installed, you could use grunt directly with

$ npm install
$ grunt test

Which does the same thing.

Release History

  • 2013-02-20 v1.0.0 First official release
  • 2013-09-19 v1.0.1 Do not log every validated file
  • 2013-10-31 v1.0.2 Add output of count of successfully linted JSON file for issue
  • 2013-11-16 v1.0.3 Fix output of count of successfully linted JSON files.
  • 2013-11-18 v1.0.4 Updated for latest dependencies.
  • 2015-10-11 v1.0.5 Updated for latest dependencies.
  • 2015-10-29 v1.0.6 CJSON support thanks to @fredghosn, unit tests
  • 2015-12-23 v1.0.7 Include file name and JSON source line number in error messages