JSON Formatter
Format, beautify and validate JSON in one click. Paste minified or messy JSON and get clean, indented output with clear error messages. Your JSON is processed directly in your browser.
This tool runs entirely in your browser.
How to use the JSON Formatter
- 1Paste your JSON into the input box (or click “Load sample”).
- 2Choose the indentation and whether to sort keys alphabetically.
- 3Click “Format JSON”, then copy or download the result.
What is the JSON Formatter?
A JSON formatter (or beautifier) adds consistent indentation and line breaks to JSON so humans can read it. The data itself is unchanged. If the input is not valid JSON, the formatter shows the error and the line and column where parsing failed.
API responses, config files and logs often contain sensitive data. This formatter uses the browser’s native JSON parser, so nothing is sent to a server.
Frequently asked questions
Why does my JSON fail to format?
Common causes are trailing commas, single quotes instead of double quotes, unquoted keys and comments — none of which are allowed in standard JSON.
Does sorting keys change my data?
No. JSON objects are unordered, so sorting keys only changes how the data is displayed. Array order is never changed.
Is the JSON Formatter free and private?
Yes. The JSON Formatter is free, needs no account, and runs entirely in your browser. What you type is never sent to a server or stored.