Does the text leave this browser?

No. Formatting finishes in the browser you have open.

Can JSON with comments be read?

Yes. Comments and a trailing comma are read, then shown as strict JSON.

Turn on unescape. One string layer is peeled off and formatted again.

Home JSON formatter

Line it up with 2 spaces, 4 spaces, or a tab, and turn keys into snake_case or camelCase.

JSON

Indent

Keys

File

Result

JSON stuck on one line is hard to read. Indentation shows which part is an array and which is an object.

A string wrapped one extra time in a log can be unescaped, peeled once, and formatted again.

01How to use it

Paste JSON or open a file. Choose the indent and the key style.

A trailing comma or a key without quotes is still shown as strict JSON.
02What you get

{"a":1,"b":[2]} is split onto its own lines.

userName becomes user_name in snake_case.

Entered{"a":1}

JSON { "a": 1 }
03Worth knowing

Valid JSON keeps the original spelling of numbers and strings and only gains line breaks.

A bad spot is reported as a line and a character.

JSON	{ "a": 1 }

QDoes the text leave this browser?: ANo. Formatting finishes in the browser you have open.
QCan JSON with comments be read?: AYes. Comments and a trailing comma are read, then shown as strict JSON.
QWhat about a string wrapped once more?: ATurn on unescape. One string layer is peeled off and formatted again.