Format, validate, and minify JSON instantly. Free online tool with syntax validation and customizable indentation.
Pretty print with 2 or 4 space indentation
Real-time JSON syntax validation
Detailed error messages for invalid JSON
Minify JSON for production
Load sample JSON data
Copy formatted output to clipboard
Download as .json file
100% client-side - your data stays private
Format API responses for debugging and documentation.
Validate and beautify JSON config files for better readability.
Pretty print JSON data to understand complex nested structures.
Format MongoDB documents or NoSQL data for review.
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The fastest, most private way to format and validate JSON online.
See formatted output in real-time as you type or paste JSON.
Detailed error messages show exactly where syntax problems occur.
All processing happens in your browser. JSON data never leaves your device.
Format large JSON files instantly with no server delays.
Compress JSON for production by removing all whitespace.
Copy to clipboard or download as a .json file.
See how Edesy compares to JSONLint and other online formatters
| Feature | Edesy | JSONLint | Others |
|---|---|---|---|
| Free to use | |||
| No signup required | |||
| Privacy (no upload) | |||
| Syntax highlighting | |||
| Minify option | |||
| Download as file | |||
| Custom indentation |
JSON (JavaScript Object Notation) is a lightweight data interchange format. It's human-readable and easy for machines to parse. JSON is the standard format for REST APIs, configuration files, and data storage in modern web applications.
Unformatted JSON is often a single line of text, making it nearly impossible to read and debug. Formatting adds proper indentation and line breaks, making the structure clear and errors easy to spot.
Our validator checks for common JSON syntax errors: missing commas, unquoted keys, single quotes (should be double), trailing commas, and mismatched brackets. Error messages pinpoint the exact location of problems.
Unlike JSONLint and similar tools that send your data to their servers, our formatter processes everything locally in your browser. Your JSON data never leaves your device - perfect for sensitive API keys and configuration files.