How JSON Formatter works
JSON Formatter transforms, validates or analyzes the data you provide according to the operation described on this page. The output should be reviewed before it is used in production code or security-sensitive workflows.
Format, validate, and beautify JSON instantly in your browser.
The JSON Formatter helps you format, validate, and beautify JSON data instantly. Formatting and validation are performed in your browser during normal use, without intentionally uploading the JSON to UtilsDesk servers.
Paste your JSON into the editor.
Click Format JSON.
Review or edit the formatted output.
Copy the result.
Pretty-print JSON
Validate JSON syntax
One-click formatting
Runs locally in your browser
Input
{"name":"John","age":30,"city":"London"}Output
{
"name": "John",
"age": 30,
"city": "London"
}JSON Formatter transforms, validates or analyzes the data you provide according to the operation described on this page. The output should be reviewed before it is used in production code or security-sensitive workflows.
Generated or transformed output should be reviewed before deployment. Do not paste secrets, private keys, passwords or other sensitive credentials into a tool unless its privacy behavior explicitly supports that use.
This tool is designed to perform its main calculation or transformation in your browser. Do not enter information that the tool does not need, and review the site's Privacy Policy for analytics, advertising and third-party services.
Answers about how the tool works, its limitations, and how your information is handled.
Yes. Invalid JSON will be detected and an error will be shown.
No. Everything is processed locally in your browser.
Performance depends on your device and the size of the JSON. Formatting and validation are performed in the browser during normal use.
This tool is designed to perform its main calculation or transformation in your browser. Do not enter information that the tool does not need, and review the site's Privacy Policy for analytics, advertising and third-party services.
Continue with related UtilsDesk tools for the same type of task. Each tool has its own instructions, examples, methodology notes, and limitations.