JSON Formatter
JSON (JavaScript Object Notation) is a lightweight text format for structured data, widely used in APIs, configuration files, and data storage. Its simplicity and language independence have made it the dominant data interchange format on the web.
1.
Paste your JSON into the Input panel
2.
The result appears instantly - switch between Format and Minify using the toggle
3.
Copy the result or fix any validation errors shown
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Reading API responses that arrive as a single unformatted line
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Minifying JSON config files before committing or deploying
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Validating JSON syntax before parsing it in code
What indentation does the formatter use?
The formatter uses 2-space indentation by default, which is the most common convention for JSON.
Can it detect JSON errors?
If your JSON has a syntax error, the tool shows an error message with details from the parser so you can locate and fix the problem.
Is there a size limit?
There is no hard limit, but very large JSON files (several megabytes) may slow down the browser. For large files, consider a desktop editor.
Is my data sent to a server?
All formatting and validation runs in your browser. No JSON is transmitted to any server.
What is the difference between Format and Minify?
Format adds whitespace and indentation to make JSON human-readable. Minify removes all unnecessary whitespace to make JSON as compact as possible for transmission.