JSON Formatter & Minifier
Format, beautify, and minify JSON online. Free JSON formatter with syntax validation and error highlighting.
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What is JSON Formatter & Minifier?
JSON (JavaScript Object Notation) is a lightweight data-interchange format. A JSON formatter takes messy, minified, or hard-to-read JSON and reformats it with proper indentation and line breaks. A JSON minifier does the reverse — removing whitespace to reduce file size for production use.
How to Use
- Paste your JSON data into the input area
- Click Format to beautify with 2-space indentation, or Minify to compress
- If your JSON has syntax errors, the tool highlights the exact error location
- Copy the formatted or minified result
Examples
Format minified JSON
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Frequently Asked Questions
What JSON syntax errors does it detect?
It detects missing commas, extra commas (trailing commas), unclosed brackets/braces, invalid escape sequences, and other syntax issues. The error message includes the approximate line and column position.
What indentation options are available?
The formatter uses 2-space indentation by default, which is the most common standard. This produces clean, readable output suitable for development and debugging.
Does it handle nested JSON arrays?
Yes. The formatter handles arbitrarily nested JSON objects and arrays, regardless of depth. It correctly indents each level.