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JSON formatter

Paste JSON to make it readable — or minify it to one line. Errors are shown with the exact line and column. Free, and your data never leaves your device.

JSON

How to format JSON

  1. Paste your JSON on the left, open a file or drag it in.
  2. Choose Beautify (2 spaces, 4 spaces or tabs) or Minify, and optionally Sort keys.
  3. Fix any error shown with its line and column, then Copy or Download the result.

Frequently asked questions

How do I format JSON?

Paste the JSON into the left box or open a .json file. It is checked and formatted instantly. A green “Valid JSON” message means it is fine; otherwise you see the line and column of the error.

What are the most common JSON errors?

A trailing comma after the last item, single quotes instead of double quotes, keys without quotes, comments, and unescaped line breaks inside strings. JSON allows none of these.

What does Minify do?

It removes all spaces and line breaks, so the JSON is as small as possible — useful for configs, APIs and storage.

What does Sort keys do?

It orders the keys of every object alphabetically, which makes two JSON files much easier to compare.

Is my JSON sent to a server?

No. FileCrafty checks and formats JSON inside your browser, so tokens, keys and personal data stay on your device.

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