Format, validate, and prettify JSON data
JSON (JavaScript Object Notation) is a lightweight data interchange format that is easy for humans to read and write, and easy for machines to parse and generate. It is based on key-value pairs and ordered lists, and is the most common format for API responses and configuration files.
Paste your data into the input field and click Validate. The tool uses JSON.parse() to check if the syntax is correct. Common errors include missing commas, unquoted keys, trailing commas, and single quotes instead of double quotes.
JSON is used for API request and response bodies, configuration files (package.json, tsconfig.json), data storage in NoSQL databases like MongoDB, inter-service communication in microservices, and browser localStorage/sessionStorage.