Free online JSON formatter, validator, and viewer. Beautify, minify, and validate JSON with syntax highlighting and tree view.
Free JSON formatter with syntax highlighting, auto-validation, collapsible tree view, and error line highlighting. Handles large files up to 500KB+. No signup, no data uploaded.
Paste or type your JSON data into the input area.
Click Format to beautify, Minify to compress, or Validate to check syntax.
Copy the formatted output to your clipboard with one click.
It takes raw or minified JSON and formats it with proper indentation for readability. It can also minify formatted JSON and validate its syntax.
Yes, the formatted output uses color-coded syntax highlighting for keys, strings, numbers, booleans, and null values.
Yes, the validator identifies syntax errors and shows the exact error message to help you fix malformed JSON.
Yes, the JSON Formatter is 100% free with no limits on the size or number of JSON documents you can format. There are no hidden fees.
Yes. All formatting, minification, and validation happens entirely in your browser. Your JSON data is never sent to any server.
Yes, the tool is fully responsive and works on smartphones and tablets. Paste JSON from your clipboard and format it directly in your mobile browser.