JSON Formatter
Paste JSON below to format, validate, beautify, or minify it in your browser. This MVP version is designed for privacy-first local processing: your pasted JSON is not intentionally uploaded or stored by this tool.
Paste valid JSON. Invalid JSON will show a clear error message.
Formatted or minified output appears here.
What this JSON Formatter does
This JSON Formatter helps you make compact JSON easier to read, validate JSON syntax, and minify formatted JSON for copying into applications, APIs, or configuration files.
How JSON formatting works
The tool parses the text as JSON. If the JSON is valid, it outputs the same data with readable indentation or as a compact minified string. If the JSON is invalid, it reports the parsing error so you can fix it.
Common JSON errors
- Missing quotation marks around object keys.
- Using single quotes instead of double quotes.
- Trailing commas after the final item in an object or array.
- Unclosed brackets, braces, or quotation marks.
JSON example
{
"name": "Smart Tools Hub",
"tool": "JSON Formatter",
"features": ["format", "validate", "minify", "copy"]
}
Privacy note
This MVP tool is designed to run in your browser. Do not paste passwords, private keys, medical records, tax records, or sensitive personal data into any online tool unless you understand how that tool handles data.
FAQ
Is my JSON uploaded to a server?
This MVP version is designed to process JSON locally in the browser and not intentionally upload or store pasted JSON.
What is the difference between formatted and minified JSON?
Formatted JSON uses indentation and line breaks for readability. Minified JSON removes extra spacing to make the text smaller.
Why is my JSON invalid?
Common reasons include missing double quotes, trailing commas, or unmatched brackets and braces.
Does this tool change my data?
Formatting changes the spacing and line breaks, not the underlying JSON values.