Format and minify JSON, with syntax error detection.
Paste your JSON and click Format. You can change the indent width or minify the output. Syntax errors are reported with a message to help debugging.
No. Formatting, minifying, and validation are all handled by JavaScript in your browser. Even JSON containing API keys or personal information is never sent anywhere.
Yes. If you enter invalid JSON, an error message describing the problem is shown, so you can use it to spot syntax mistakes.
Yes, as long as it fits within your browser's available memory. JSON files up to a few megabytes can be formatted without any trouble.
