JSON Formatter & Validator
A free online JSON formatter and validator. Beautify, minify, and parse your JSON data with error highlighting instantly and securely in your browser.
JSON Formatter & Validator
Paste your JSON payload below to prettify, minify, and validate it instantly. 100% secure, processed entirely in your browser.
Input JSON
Output
What is a JSON Formatter?
JSON (JavaScript Object Notation) is an incredibly popular data format used to transmit information between servers and web applications. However, unformatted, minified JSON is extremely difficult for humans to read.
Our Free Online JSON Formatter automatically parses your raw JSON payload and structures it with proper indentation, line breaks, and formatting, making it incredibly easy to scan, read, and debug.
Secure, Private & Offline-Ready
Unlike other tools, our JSON formatter evaluates and processes your data 100% locally in your browser. Your sensitive API payloads and configuration files are never uploaded to our servers or stored anywhere. This guarantees maximum privacy and security for your development workflow.
Built-in JSON Validator
Finding a missing comma or bracket in thousands of lines of JSON can be a nightmare. When you paste your payload into the editor, we immediately validate its syntax. If your JSON is invalid, you will receive a descriptive error message along with the approximate line number where the issue occurred, saving you hours of troubleshooting.