Free browser tool
Beautify, minify, sort, and validate JSON with clear error feedback and useful document statistics. JSONCleanr helps developers turn hard-to-read data into consistent, production-ready output.
Common uses
{"name":"Ada","active":true}
↓
{
"name":
"Ada",
"active": true
}
Expand minified JSON into an indented structure that is easier to inspect and debug.
{"status": "ok",}
↓
Error: trailing comma
Find malformed JSON with clear line and column details for faster troubleshooting.
{"z": 1, "a": 2, "z": 3}
↓
{"a": 2, "z":3}
Sort keys and remove duplicate properties to create predictable JSON output.
What it can do
Switch between readable indentation and compact JSON output.
Catch malformed JSON with actionable line and column information.
Review keys, values, nesting depth, data types, and duplicate-key counts.
Three simple steps
Add an object, array, or API response to the Input field.
Choose pretty printing, minification, key sorting, or duplicate removal.
Run JSONCleanr, resolve any validation errors, and export the result.
Helpful answers
It identifies syntax errors and shows the relevant line and column whenever that information is available.
Yes. Choose the minify option to remove unnecessary whitespace and create compact output.
Yes. JSONCleanr can sort object keys while preserving arrays and values.