How to Format JSON Online
Learn how to format and pretty-print JSON in seconds using our free browser-based JSON Formatter. No installation required.
Steps
Paste your JSON
Copy your raw or minified JSON and paste it into the input area. The editor accepts any valid JSON string, object, or array.
Click Format
Press the Format button. The tool will parse your JSON and apply consistent indentation with 2-space or 4-space formatting.
Review the output
The formatted JSON appears with syntax highlighting so you can easily inspect keys, values, and nested structures.
Copy or download
Click the Copy button to copy the formatted JSON to your clipboard, or download it as a .json file.
Why Format JSON?
Raw JSON from APIs or configuration files is often minified into a single line, making it nearly impossible to read. Formatting adds indentation and line breaks so you can quickly understand the structure, find specific keys, and spot errors.
When to Use a JSON Formatter
Use a JSON formatter whenever you need to inspect an API response, debug a configuration file, or prepare JSON for documentation. It is also helpful during code reviews when you want to compare two JSON objects side by side.
Frequently Asked Questions
No. Formatting only adds whitespace and indentation. The underlying data structure and values remain identical.
The formatter will display a clear error message pointing to the location of the syntax error so you can fix it quickly.
Yes. You can switch between 2-space and 4-space indentation, as well as tab indentation.