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JSON Formatter and Validator - Free Online

Paste JSON to format it neatly, shrink it, or check that it is valid. Errors are shown in plain text.

Your data stays on your device.

How to use this tool

  1. Paste your JSON into the first box.
  2. Press Format to tidy it or Minify to shrink it.
  3. Press Copy result.

About this tool

JSON is a text format for data, used by almost every website and app. Formatting adds line breaks and indentation so it is easy to read. Minifying removes all unnecessary spaces so the file is as small as possible.

If the JSON is invalid, the tool shows the error from your browser's own JSON parser, which usually points to the position of the problem. The most common mistakes are a missing or extra comma, single quotes instead of double quotes, and a missing closing bracket.

JSON kaise format kare? JSON paste karo aur Format ya Minify dabao, galti hogi to error dikhega.

Frequently asked questions

Why does it say my JSON is invalid?

Common causes are a trailing comma, single quotes instead of double quotes, unquoted keys, or a missing bracket. The error message usually shows the position.

Does it change my data?

No. Formatting and minifying only change spacing. Very large numbers may lose precision, as in any JavaScript tool.

Is my JSON uploaded?

No. It is processed in your browser only.

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