Serializing an object to JSON

Question

How can I serialize an object to JSON in JavaScript?

score 296 · Accepted Answer · edited Apr 07 '17 at 13:26

296

You're looking for JSON.stringify().

edited Apr 07 '17 at 13:26

Michał Perłakowski

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answered Feb 17 '09 at 20:16

Mike_G

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Using JSON.stringify() with javascript objects containing arrays have a little thing to it. Please check my question: http://stackoverflow.com/questions/25423883/parsing-json-array-gives-error – uylmz Aug 21 '14 at 12:33

score 53 · Answer 2 · edited May 12 '15 at 11:00

53

Download https://github.com/douglascrockford/JSON-js/blob/master/json2.js, include it and do

var json_data = JSON.stringify(obj);

edited May 12 '15 at 11:00

bartektartanus

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answered Feb 17 '09 at 20:18

Johannes Weiss

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Should I really need to include "json2.js"? It seems to works without it. – Pavel Alexeev Mar 31 '12 at 08:28
32

@PavelAlexeev No, you don't neet to include `json2.js` anymore, unless you are targetting very old browsers: modern browsers include a native implementation of the `JSON` object. The good thing about `json2.js` is that it will only kick in if no native object is found. See [http://stackoverflow.com/questions/891299/browser-native-json-support-window-json] for a detailed breakdown of browser support. – Edurne Pascual May 10 '12 at 08:14

AvL · Answer 3 · 2013-06-01T11:47:32.187

Just to keep it backward compatible I load Crockfords JSON-library from cloudflare CDN if no native JSON support is given (for simplicity using jQuery):

function winHasJSON(){
  json_data = JSON.stringify(obj);
  // ... (do stuff with json_data)
}
if(typeof JSON === 'object' && typeof JSON.stringify === 'function'){
  winHasJSON();
} else {
  $.getScript('//cdnjs.cloudflare.com/ajax/libs/json2/20121008/json2.min.js', winHasJSON)
}

Serializing an object to JSON

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