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I am aware of the fact that for JSON whitespace matters. But, just for debug output, I would like to print JSON objects formatted, thus with tabs and newlines.

Is there a function in JavaScript for formatted JSON stringification?

I am aware of the fact that for JSON whitespace matters. But, just for debug output, I would like to print JSON objects formatted, thus with tabs and newlines.

Is there a function in JavaScript for formatted JSON stringification?

• javascript
• json
• formatting

Share Improve this question Follow edited May 18, 2013 at 8:10 Denys Séguret 383k9090 gold badges811811 silver badges776776 bronze badges asked May 16, 2013 at 15:35 danijardanijar 34.3k5353 gold badges179179 silver badges315315 bronze badges

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Sorted by: Reset to default 16

The third argument of JSON.stringify controls spacing. So you can do this, for example :

var o = {
  a: {c:34}
};

console.log(JSON.stringify(o, null, '\t'));

This logs

{
    "a": {
        "c": 34
    }
} 

This parameter can accept different kind of values :

The space argument may be used to control spacing in the final string. If it is a number, successive levels in the stringification will each be indented by this many space characters (up to 10). If it is a string, successive levels will indented by this string (or the first ten characters of it).

Using a tab character mimics standard pretty-print appearance:

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