Text and data tools
JSON Formatter & Validator
Format, minify, and validate JSON locally in your browser.
Root Type
Size
Items
Depth
Input
Output
Diagnostics
Run validation to inspect syntax.
Tree Preview
Format or validate JSON to inspect its structure.
Format and validate JSON before using it in apps or APIs
The JSON formatter validates syntax, formats or minifies data, sorts keys, reports parse errors, and shows a collapsible tree with object, array, key, and depth stats. Use it for API responses, config files, logs, and pasted payloads.
Everything runs locally in the browser, which keeps quick JSON cleanup fast and avoids sending ordinary payloads to a remote formatter.