JSON Formatter & Validator Online — Free
Format, beautify, and validate JSON data with customizable indentation.
Frequently Asked Questions
How do I format JSON online?
Paste your minified or messy JSON into the input box. Our formatter instantly beautifies it with proper indentation. Choose 2 or 4 spaces for indent size.
Does this validate JSON?
Yes, our JSON formatter also validates your JSON syntax and provides clear error messages with line numbers if the JSON is invalid.
Can I minify JSON?
Yes, use the Minify button to remove all whitespace and produce compact, single-line JSON output — perfect for reducing payload size.
What is the difference between JSON formatter and JSON validator?
A JSON formatter beautifies the appearance of valid JSON with indentation. A JSON validator checks whether the JSON syntax is correct. Our tool does both simultaneously.
Is this JSON formatter free?
Yes, completely free with no usage limits, no sign-up required, and no ads that block your workflow. Your data stays in your browser.
Privacy First: All processing happens directly in your browser. Your data never leaves your device.