JSON Formatter/Minifier

Format, minify, and re-case JSON so it is easy to read and validate.

About JSON Formatter/Minifier

Minified or hand-edited JSON is hard to read and easy to break. The JSON Formatter pretty-prints it with consistent indentation, or minifies it back down, and validates the structure along the way.

Paste your JSON and choose an action: format it with clean indentation for reading, minify it to the smallest valid form for transport, or convert key names between cases such as camelCase and snake_case. If the JSON is invalid, you will know immediately rather than discovering it later in your code.

Developers use it constantly - tidying API responses, preparing config files, cleaning up data copied from logs, and standardizing field naming before sending JSON to a service that expects a particular case. The output is always valid JSON you can copy straight back into your project.

Frequently asked questions

Does formatting change my data?

No - it only changes whitespace and, if you choose, key-name casing. Values stay the same.

Can it tell me if my JSON is broken?

Yes, invalid JSON is reported so you can fix the syntax.

What does minify do?

It removes all unnecessary whitespace to produce the smallest valid JSON for storage or transfer.

Can it convert keys to snake_case or camelCase?

Yes, you can standardize key naming across the document.

Is there a size limit?

Typical payloads format instantly; very large documents may take a moment.