Free JSON Formatter & Validator
Paste your JSON to format it with proper indentation, validate it for errors, or minify it for production — all in one click.
Instantly beautify JSON with 2-space indentation and highlight syntax errors with a clear error message.
Strip all whitespace to reduce JSON file size before sending to an API or saving to a database.
All processing happens in your browser using native JSON.parse(). Your data never leaves your device.
Frequently asked questions
What does JSON formatting do?
It adds proper indentation and line breaks to make JSON human-readable, without changing the data.
What is JSON minification?
Minification removes all whitespace from JSON to reduce its size, which saves bandwidth when transferring data.
Why is my JSON invalid?
Common issues: trailing commas, single quotes instead of double quotes, or unquoted keys. The error message will point to the exact problem.