JSON Formatter, Validator & Beautifier - Free Online Tool
Format, validate, and beautify your JSON data with our free online tool.
📚 Complete JSON Guide | JSON Validation Guide
What is JSON?
JSON (JavaScript Object Notation) is a lightweight data interchange format. It’s easy for humans to read and write, and easy for machines to parse and generate.
{
"name": "John Doe",
"age": 30,
"email": "john@example.com",
"skills": ["JavaScript", "Python", "SQL"]
}Features of Our JSON Formatter
- Beautify JSON - Pretty print with proper indentation
- Validate JSON - Check for syntax errors instantly
- Minify JSON - Remove whitespace for smaller file size
- Tree view - Navigate complex JSON structures visually
- Syntax highlighting - Color-coded for readability
Common JSON Syntax Errors
| Error | Problem | Fix |
|---|---|---|
| Single quotes | {'key': 'value'} | Use double quotes: {"key": "value"} |
| Trailing comma | {"a": 1,} | Remove trailing comma: {"a": 1} |
| Unquoted keys | {key: "value"} | Quote keys: {"key": "value"} |
| Missing comma | {"a": 1 "b": 2} | Add comma: {"a": 1, "b": 2} |
More JSON Tools
- JSON Minifier - Compress JSON for production
- JSON Validator - Check JSON syntax
- JSON Viewer - Explore JSON with tree view
Try It Now
Use our free JSON formatter - all processing happens locally in your browser.