Free JSON Formatter and Validator
Paste messy JSON and turn it into clean, readable code in one click. The tool also validates your JSON and shows the error message when something is wrong.
How to use the Free JSON Formatter and Validator
Paste your JSON into the box. Press Format to beautify it with indentation, or Minify to remove spaces and line breaks and shrink the size. If the JSON is not valid, the tool shows the problem so you can fix it and try again. Press Copy to take the result with you.
Why format and validate JSON
Raw JSON from an API is often one long line that is hard to read. Formatting makes the structure clear, which helps when you debug a request, check a config file or share data with a teammate.
Minifying does the opposite and is useful before you send JSON over a network or paste it into code.
Frequently asked questions
How do I format JSON online?
Paste your JSON into the box and press Format. The tool adds indentation and line breaks so every key and value is easy to read.
How can I find errors in my JSON?
Press Format or Minify. If the JSON is invalid, the tool shows an error message that explains what went wrong, such as a missing comma or an extra bracket.
What does minify JSON mean?
Minifying removes spaces and line breaks without changing the data, which makes the file smaller.
Is my JSON data uploaded to a server?
No. Everything runs in your browser, so your data stays on your device.
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