Data tools

Free Online JSON Formatter

Free JSON formatter and minifier with optional key sorting and custom indentation. Everything runs locally in your browser.

Sort keys Indent

JSON input

Result

How to Use

Input JSON: Paste your JSON code into the left input box.
Select Mode: Click the buttons above to choose "Pretty" (format) or "Minify" (compact).
Adjust Settings: Toggle "Sort keys" or change indentation size (2/4/8 spaces).
Copy Result: Click "Copy result" to export the processed JSON.

Tips & FAQ

Local & Secure: All parsing and formatting is done locally in your browser. Your data is never uploaded to any server.
Key Sorting: When "Sort keys" is enabled, object keys are recursively sorted alphabetically, making it easier to read and compare.
Error Handling: If the input is invalid JSON, a red error message will appear below. Please check for syntax errors like missing quotes or commas.

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