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Tool location: /dev/json-format
Format, validate, and beautify JSON data with our free online tool. Whether you need to make JSON readable or minify it for production, this tool handles it all. Perfect for developers working with APIs and configuration files.
Copy your JSON data and paste it into the input area. The tool accepts any valid JSON structure including objects, arrays, and nested data.
Select your preferred formatting style:
The tool automatically validates your JSON. If there are syntax errors, it will highlight the exact location and provide helpful error messages.
Click the copy button to copy the formatted JSON to your clipboard, ready to use in your code or configuration files.
Instantly detects JSON syntax errors with detailed error messages.
Switch between readable and compact formats with one click.
Choose your preferred indentation style (2 or 4 spaces).
Handle large JSON files without browser slowdown.
Color-coded display for keys, values, strings, and numbers.
JSON does not support comments. Remove any // or /* */ comments before formatting.
Single quotes are not valid in JSON - only double quotes are allowed.
Trailing commas after the last item in arrays or objects will cause errors.
A: Common issues include: using single quotes instead of double quotes, trailing commas, unquoted keys, or comments in the JSON. The error message will point to the exact location of the problem.
A: Beautify adds whitespace and indentation to make JSON human-readable. Minify removes all unnecessary whitespace to reduce file size, which is ideal for production use.
A: Yes, the formatter handles deeply nested JSON structures with proper indentation at each level, making complex data structures easy to read.
A: The tool can handle reasonably large JSON files. For extremely large files (several MB), processing may take a moment but should complete successfully.