JSON Formatter

Paste JSON on the left, get clean formatted JSON on the right.

Input JSON 0 chars

Tip: press Ctrl/Cmd + Enter to format.

More options

Sort keysOrder keys A–Z for consistent diffs Remove null / emptyDrop null, empty strings, arrays and objects 2-space indentOff uses 4 spaces instead

Output —

Output is read-only to avoid accidental edits.

Processed on your device. Nothing is sent or saved.

Ready. Paste JSON and choose an action.

What a JSON formatter does

Format (beautify): pretty-prints JSON with indentation so nested objects and arrays are easy to read and scan.

Minify: strips every space and line break to produce the smallest valid JSON — handy before putting it in a URL, a log line or a config value.

Validate: checks whether your text is valid JSON and, when it is not, points to the line and column where the error is.

Sort keys orders object keys alphabetically so two versions of the same data produce a clean, stable diff.

Tips for valid JSON

Strings and keys must use double quotes — single quotes are not valid JSON.

No trailing comma after the last item in an object or array.

Only true, false and null are allowed — not True or undefined.

Comments are not part of JSON; remove them before formatting.

Everything runs in your browser; your JSON is never uploaded, logged or stored.

Frequently asked questions

How do I format or beautify JSON?

Paste your JSON on the left and click Format. You get clean, indented JSON on the right that is easy to read.

How do I check if my JSON is valid?

Click Validate. If there is a problem you will see an error message pointing to the line and position.

Can I minify JSON?

Yes. Click Minify to strip whitespace and produce the smallest valid JSON.

Is my JSON sent to a server?

No. Formatting, validating and minifying all happen in your browser; your data never leaves your device.

What a JSON formatter does