JSON Lint

A pure JavaScript version of the service provided at jsonlin.com.

Command line interface

Install jsonlint with npm to use the command line interface:

npm install jsonlint -g

Validate a file like so:

jsonlint myfile.json

or pipe input into stdin:

cat myfile.json | jsonlint

jsonlint will either report a syntax error with details or pretty print the source if it is valid.

Module interface

I'm not sure why you wouldn't use the built in JSON.parse but you can use jsonlint from a CommonJS module:

var jsonlint = require("jsonlint");

jsonlint.parse('{"creative?": false}');

It returns the parsed object or throws an Error.