API debugging
Format compact API responses so objects, arrays, and nested values are easier to inspect.
JSON formatter online
Format and validate JSON
Paste JSON, format it with indentation, minify it, or validate it directly in your browser.
Paste JSON to start.
How to use
- Paste JSON into the input box.
- Format, minify, or validate the JSON.
- Copy the output for your editor, API client, or documentation.
Common uses
Config cleanup
Validate JSON settings before saving them into an app, script, or documentation page.
Example
Paste {"name":"Key","active":true} and format it to see each property on a separate line.
FAQ
Is JSON uploaded?
No. Parsing and formatting run in your browser.
Will invalid JSON be overwritten?
No. Invalid input shows an error and keeps your previous output.