Format, validate, and minify JSON data instantly. Everything runs in your browser — your data never leaves your machine.
JSON (JavaScript Object Notation) is the most common data format for APIs and configuration files. Raw or minified JSON can be nearly impossible to read, especially with deeply nested structures. This free JSON formatter instantly beautifies your data with proper indentation so you can understand the hierarchy at a glance.
Paste any JSON string to format it with 2-space indentation, validate its syntax with clear error messages, or minify it for production use. The tool handles large payloads efficiently and runs entirely in your browser — nothing is ever transmitted to a server, making it safe for sensitive data like API responses and configuration files.
A JSON formatter takes raw or minified JSON data and beautifies it by adding proper indentation and line breaks, making the structure more readable and easier to debug.
Yes. It runs entirely in your browser. Your JSON data never leaves your machine and is never sent to any external server, making it safe for sensitive data.
Yes. The tool validates your JSON as you format it and displays clear error messages explaining any syntax problems it finds.