Paste your JSON to instantly format, validate, or minify it, with clear error messages if something's wrong.
Raw JSON from an API response or config file is often unreadable, either crammed onto one line or missing consistent indentation. This tool formats JSON into a clean, readable structure, validates it against JSON syntax rules, and can minify it back down when you need a compact version.
All parsing happens locally in your browser using native JavaScript, your data is never uploaded anywhere.
Formatting (also called "pretty printing") adds indentation and line breaks to make JSON human-readable, which is helpful for debugging and reviewing data structures.
Minifying removes all unnecessary whitespace and line breaks, producing the smallest possible file size, useful for production API responses or reducing payload size.
No. All parsing, formatting, and validation happens locally in your browser using JavaScript's built-in JSON engine. Your data is never sent to a server.
The tool will show an error message describing what's wrong (such as a missing comma or bracket), based on the exact position where parsing failed.