JSON Formatter
Prettify, minify, validate, or sort your JSON. All processing happens instantly in your browser.
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Frequently Asked Questions
How do I format or beautify JSON online?
Paste your JSON and the formatter instantly re-indents it with proper spacing and line breaks so it is easy to read. You can choose the indentation size, then copy or download the result.
What does minifying JSON do?
Minifying removes all unnecessary whitespace and line breaks, producing the smallest valid JSON. This reduces file size for storage or network transfer without changing the data.
Why is my JSON invalid?
Common causes are trailing commas, single quotes instead of double quotes, missing commas between items, or unquoted keys. The validator highlights where parsing fails so you can fix it quickly.
Is it safe to paste sensitive JSON here?
Yes. The JSON is parsed and formatted entirely in your browser using JavaScript. Nothing is uploaded, logged or stored, so it is safe for configuration files, API responses and tokens.