Format JSON Online
Format JSON online with readable indentation, copy, download, and sample input support.
How to use JSON Formatter
Paste or type content into the json input panel.
Run the formatter to clean up spacing, indentation, and structure.
Copy or download the formatted result when it looks right.
Why this helps in real workflows
An API response is hard to read in one line.
Copied JSON from logs or a browser console is messy.
You need to inspect nested objects before debugging.
A request body needs to be cleaned up before reuse.
Which tool should you choose?
JSON Formatter: Choose JSON Formatter when the JSON is valid and you want clean indentation.
JSON Validator: Choose JSON Validator when you first need to check whether the JSON is broken.
Common problems and fixes
The JSON is all in one line.
Format it first to make the structure readable and easier to inspect.
I cannot see where the nesting starts and ends.
Formatting makes arrays and objects much easier to follow visually.
The tool says there is an error.
Run the content through the JSON validator first to check for syntax issues.
Related tools
Related Guides
Frequently asked questions
How do I format JSON?
Paste your JSON into the input box, run the formatter, and copy or download the formatted JSON output.
Does the JSON formatter validate syntax?
Yes. Invalid JSON is rejected and the page shows an error instead of malformed output.
Is this JSON formatter free?
Yes. It is free to use in your browser.