JSON Formatter
Format, validate, and minify JSON data online. Supports tree view and syntax highlighting.
What is JSON?
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. Based on a subset of JavaScript, JSON has become the universal standard for data exchange on the web.
To use our JSON formatter, simply paste your raw or minified JSON into the editor. The tool instantly validates the syntax, highlights errors with line and column numbers, and formats the output with your preferred indentation. You can also toggle tree view to explore nested structures visually.
JSON is commonly used for REST API responses, application configuration files, NoSQL database storage, and inter-service communication in microservices architectures. Whether you are debugging an API response or preparing a config file, proper formatting makes the data far easier to understand.
Behind the scenes, JSON supports six data types: strings, numbers, booleans, null, arrays, and objects. Keys must be double-quoted strings, trailing commas are not allowed, and single quotes will cause a parse error. Understanding these rules helps you quickly identify and fix malformed JSON.