JSON Formatter
Instantly format and validate messy JSON data into a readable layout. A simple and powerful tool for debugging and development.
JSON Formatter
Instantly format and validate messy JSON data into a readable layout. A simple and powerful tool for debugging and development.
About JSON Formatter
Parse before formatting
The formatter parses the JSON first and then writes it back with consistent indentation. Invalid JSON stops with a syntax error, so you can catch missing commas, stray quotes, or broken payloads before using the data elsewhere.
Review payloads with stable indentation
Choose spaces or tabs to match the codebase you are reviewing. This is useful when comparing API responses, checking nested configuration, or pasting a readable payload into a pull request or issue.
FAQ
Common questions and answers about this topic.
What does this JSON formatter do?
It auto-formats and validates your JSON data with proper indentation, making it easy to read, debug, and share.
Can I customize the indentation?
Yes, choose 2 or 4 spaces, or tabs. JSON convention typically uses 2 spaces.
Does it validate the JSON?
Yes, if your JSON contains syntax errors, the tool will display an error message indicating where the problem is, helping you quickly fix invalid JSON.
Is my data sent to any server?
No, JSON formatting is handled entirely in your browser. Your data is parsed and re-formatted locally with JavaScript — nothing leaves your device.