JSON Formatter & Validator
Format, validate, and beautify JSON data online
About JSON Formatter & Validator
Format, validate, and beautify your JSON data instantly. Paste your minified or messy JSON and get clean, indented, human-readable output. Our JSON formatter supports syntax highlighting and error detection to help you debug JSON payloads from APIs, config files, and databases.
Use Cases
- Formatting API response payloads for debugging
- Validating JSON config files before deployment
- Pretty-printing minified JSON for code reviews
- Checking JSON syntax for database queries
Frequently Asked Questions
What is JSON formatting?
JSON formatting (also called beautifying or pretty-printing) adds proper indentation and line breaks to JSON data, making it easy to read and understand the structure of nested objects and arrays.
Is my data secure?
Yes! All processing happens directly in your browser. Your JSON data never leaves your device — nothing is sent to any server.
Can this tool validate JSON?
Absolutely. If your JSON is invalid, the formatter will show the exact error location and message so you can fix it quickly.
What size JSON can I format?
The tool handles JSON files up to several megabytes. For very large files, processing may take a moment but everything stays client-side.