JSON Formatter Online
Format, validate, and prettify JSON instantly.
Paste raw JSON, clean it up, and validate the structure instantly with a fast browser-based formatter.
Browser-sideNo signup
{
"hello": "world",
"items": [
1,
2,
3
]
}Valid JSON.
How it works
- Open the tool and add your file or text input.
- Run the main action, like format, convert, resize, or inspect.
- Review the output and download or copy the result instantly.
Your JSON stays in your browser.
Common use cases
- Debug APIs
- Prettify payloads
- Validate copied JSON before use
FAQ
Short answers to the questions people usually ask before using a file tool.
Is it free?
Yes.
Do I need an account?
No.
Is JSON uploaded anywhere?
No. Formatting happens in your browser.
Will it tell me if JSON is invalid?
Yes. The formatter reports parse errors when the input is invalid.
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