JSON Formatter
Format and pretty-print JSON with customizable indentation.
About JSON Formatter
JSON Formatter takes compact or messy JSON and outputs it with consistent indentation and line breaks, making nested structures easy to read. It is especially useful when working with API responses, config files, or log data that arrives as a single unreadable line. You can choose your preferred indent size and the result is immediately ready to copy or share.
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Frequently Asked Questions
Is JSON Formatter free?
Yes, completely free. No signup, no account, no usage limits. Use it as much as you need.
Is my data secure?
All processing happens directly in your browser using JavaScript. Your data is never sent to any server, stored, or shared. It stays entirely on your device.
Does the formatter change or modify my JSON data?
No. The formatter only adjusts whitespace and indentation. Your keys, values, and structure remain completely unchanged.
What indent sizes are supported?
You can choose 2 spaces, 4 spaces, or a tab character. The default is 2 spaces, which is the most common convention.