Free JSON Formatter & Validator Online
Format, minify, and validate JSON data instantly in your browser. Syntax highlighting, error detection with line numbers, and one-click copy.
How to Use
- Paste your JSON data into the input textarea
- Click Format to pretty-print with indentation and syntax highlighting
- Click Minify to compress JSON by removing whitespace
- Click Validate to check if your JSON is valid (errors show line numbers)
- Use Copy Output to copy the result to your clipboard
- Change indent size (2 spaces, 4 spaces, or tab) using the dropdown
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