Why Format JSON?
JSON (JavaScript Object Notation) is the universal data format for APIs and configuration. But raw JSON from servers is often minified - all on one line with no whitespace. Formatting makes it human-readable.
Common Use Cases
- API Debugging - Inspect API responses in a readable format
- Config Files - Clean up package.json, tsconfig.json, etc.
- Data Validation - Quickly check if JSON is valid before using it
- Documentation - Format JSON examples for docs
Frequently Asked Questions
What does this tool do?
This tool formats (pretty prints) JSON data with proper indentation, validates JSON syntax to catch errors, and can minify JSON by removing whitespace. It's essential for developers working with APIs, configuration files, or data interchange.
Is my data secure?
Yes! This tool runs entirely in your browser. Your JSON data is never sent to any server - all processing happens locally on your device.
What JSON errors can it detect?
The validator catches syntax errors like missing quotes, trailing commas, unmatched brackets, invalid escape sequences, and malformed values. It shows the exact line and position of errors.
Can I customize the indentation?
Yes! You can choose between 2 spaces, 4 spaces, or tabs for indentation when formatting your JSON.