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JSON Formatter & Validator
Beautify, validate and minify JSON instantly. Syntax errors are reported with precise locations.
How to use
- Paste or type JSON into the text area.
- Click Format to pretty-print it with indentation, or Minify to compress it into a single line.
- Click Validate to check correctness - errors show the line and column where parsing failed.
- Use Copy to put the formatted result on your clipboard.
Frequently asked questions
How do I format JSON online?
Paste your JSON into the input box and click Format. The tool pretty-prints it with 2-space indentation. If the JSON has syntax errors, it highlights the exact location to help you fix it.
Is my JSON uploaded to a server?
No. The JSON Formatter runs entirely in your browser using JavaScript. Your data never leaves your device, so you can safely format sensitive JSON like API keys or configuration files.
What is the difference between format and minify?
Format (beautify) adds indentation and line breaks to make JSON human-readable. Minify removes all whitespace to produce the smallest possible size, useful for APIs and storage.