Free JSON Formatter & Validator
Format, beautify, validate, and minify JSON data in real time. Pinpoint syntax errors instantly and beautify unformatted API responses.
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Paste JSON
Paste messy or unformatted JSON code into the editor workspace or click Load Sample.
Format or Minify
Click Format to indent cleanly or Minify to strip whitespace for production payloads.
Copy or Download
Copy your clean JSON to clipboard or download it directly as a formatted .json file.
Frequently asked questions
Common JSON errors include trailing commas after the last item, single quotes instead of double quotes around keys/strings, or unescaped control characters. Our validator highlights the exact location to fix.
Yes. Files Craft runs 100% in-browser JavaScript. Your data never leaves your computer, making it completely safe for sensitive API payloads and database records.
Formatting (beautifying) adds line breaks and indentation to make JSON easy for humans to read. Minifying removes all extra spaces and line breaks to minimize transfer size.
Yes, Files Craft JSON Formatter is 100% free with unlimited usage, zero subscriptions, and no registrations required.