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Format and Validate

JSON Formatter Online

Format, validate and minify JSON locally in your browser.

Formatted JSON

Local processing

This tool is designed to run in your browser. Do not paste secrets or production credentials into any online tool.

How to use this tool

Paste your input, choose an action, review the result, then copy the output when it looks correct. Invalid input shows a readable error instead of silently changing your data.

Example

Input

{"name":"Ada","roles":["developer","writer"]}

Output

{
  "name": "Ada",
  "roles": [
    "developer",
    "writer"
  ]
}

FAQ

Does this JSON formatter upload my data?

No. The formatter runs in your browser and does not send your input to a server.

Can it show JSON syntax errors?

Yes. Invalid JSON shows a clear parse error so you can fix the input.

Can I minify JSON too?

Yes. Use the minify action to remove whitespace from valid JSON.