JSON Formatter & Validator
Format, validate, and minify JSON instantly — no signup, 100% private.
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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. It is widely used for APIs, configuration files, and data storage.
Properly formatted JSON is far easier to read and debug. Our formatter adds consistent indentation, line breaks, and syntax structure so you can quickly identify issues or understand the data layout.
Format vs. Minify
- Format / Prettify — adds indentation and line breaks for human readability. Use during development and debugging.
- Minify — removes all whitespace to reduce file size. Use for production APIs and storage.
Common JSON Use Cases
- REST API responses and requests
- Configuration files (package.json, etc.)
- NoSQL database documents
- Data exchange between services
- Browser localStorage data