Free online JSON formatter and validator. Format, minify and validate JSON with syntax highlighting and instant error detection.
Formatted output will appear hereCopy your JSON data from any source — an API response, config file, or database export — and paste it into the input panel.
Click 'Format' to beautify with proper indentation, 'Minify' to compress into a single line, or 'Validate' to check for syntax errors.
Switch between 2 spaces, 4 spaces, or tab indentation to match your project's coding style.
Click the Copy button to copy the formatted or minified JSON to your clipboard, ready to use.
Yes. Everything runs in your browser. No JSON data is ever sent to our servers or stored anywhere.
There's no hard limit. The tool handles JSON files up to several megabytes. Very large files may take a moment to process.
Standard JSON doesn't support comments. If your data contains comments, they'll need to be removed first for valid JSON parsing.
Minifying removes all whitespace, newlines, and indentation from your JSON, producing the most compact representation. This is useful for reducing file size in production.
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