JSON Formatter
Paste JSON, then beautify it for readability, minify it for production, or validate it with clear error messages — entirely in your browser.
Options
JSON is formatted entirely in your browser — your data never leaves your device.
How it works
- Paste your JSON into the input area.
- Choose an indent size (2, 4, or tab) and click Beautify to format it, Minify to compress it, or Validate to check for errors.
- If the JSON is invalid, the error message includes the line and column number so you can quickly find the issue.
- Copy the result with one click.
Frequently asked questions
- What does Beautify do?
- Beautify parses your JSON and reformats it with consistent indentation and line breaks, making nested objects and arrays easy to read. You can choose 2-space, 4-space or tab indenting.
- What does Minify do?
- Minify removes all unnecessary whitespace, producing the most compact valid JSON string. This is useful when sending JSON over a network or embedding it in code.
- How does validation work?
- The validator parses your JSON and reports any syntax errors including the line number and column position, making it easy to find and fix the problem.
- What indentation should I use?
- 2 spaces is the most common convention in JavaScript / Node.js projects. 4 spaces matches Python and many Java codebases. Tab indentation is preferred by some accessibility guidelines because users can configure tab width in their editor.
- Is my JSON stored anywhere?
- No. All parsing and formatting happens in your browser. Nothing is ever sent to a server.