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.