Free JSON Formatter & Validator
Paste your JSON into the box below and format it with proper indentation, minify it into a compact single line, or simply validate it. Any syntax error is reported with a clear message and position so you can fix it fast — all processing happens right in your browser.
Frequently Asked Questions
What does the JSON formatter do?
It parses your JSON and re-prints it with two-space indentation and sorted-free structure, making nested data easy to read and debug.
How do I minify JSON?
Paste your JSON and click the Minify button. All unnecessary whitespace is removed, producing the smallest valid JSON string for APIs and data transfer.
Is my JSON data private?
Yes. Everything runs 100% in your browser — your JSON is never uploaded or sent to any server.
How do I fix a validation error?
Read the error message: it tells you what is wrong and where. The most common issues are trailing commas, single quotes instead of double quotes, and comments, none of which are valid in strict JSON.