JSON Formatter
Validate and beautify JSON
Validate, format, and minify JSON instantly. Paste your JSON to beautify it with proper indentation or minify it for production. Free tool—no signup. Perfect for developers, APIs, or debugging. Works in your browser, private by design.
JSON Formatter
How the JSON Formatter Works
- Paste your JSON string into the input area. The tool parses it and validates the syntax.
- Choose format (beautify) or minify. Beautify adds indentation for readability; minify removes whitespace for production.
- View the result. Invalid JSON shows an error message. Valid JSON displays formatted or minified.
- All processing happens in your browser. Your JSON never leaves your device. Fully private.
Why Use This Tool?
JSON from APIs or config files often arrives as a single line—hard to read and debug. This formatter beautifies it with proper indentation so you can spot errors quickly. Minify mode shrinks it for production. Essential for developers working with APIs, configs, or data. No signup, no server round-trips. Your JSON stays on your device.
Understanding JSON
JSON (JavaScript Object Notation) is a lightweight data format. Keys and string values use double quotes.
Valid JSON: objects {}, arrays [], strings, numbers, true/false/null. Trailing commas are invalid.
Beautify adds indentation (typically 2 spaces) for readability. Minify removes all unnecessary whitespace.
Common errors: missing quotes on keys, trailing commas, single quotes instead of double, unescaped characters in strings.
Common Use Cases
- ✓Debugging API responses
- ✓Formatting config files
- ✓Validating JSON syntax
- ✓Minifying JSON for production