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Developer Tool
Quickly format, validate, and analyze JSON. Get precise error locations for invalid JSON.
Paste JSON here…
Paste JSON into the input area.
Choose indentation style and whether to sort keys.
Copy the formatted JSON or download it as a file.
JSON (JavaScript Object Notation) is a text format for structured data. It's widely used in web APIs and configuration files.
Formatted JSON is easier to read, debug, and compare in version control.
Yes, all processing happens in your browser. Your JSON never leaves your device.
Yes, paste the URL of a public JSON API or .json file. The server must allow CORS.