Free Online JSON Formatter
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What is JSON?
JSON stands for JavaScript Object Notation. It is a lightweight data-interchange format that is easy for humans to read and write and easy for machines to parse and generate.
It is based on a subset of the JavaScript Programming Language Standard. JSON is a text format that is completely language independent but uses conventions that are familiar to programmers of the C-family of languages.
Common JSON Errors
| Error Type | Description | Example |
|---|---|---|
| Trailing Comma | A comma after the last item in an array or object. | {"a":1,} |
| Single Quotes | Using single quotes for keys or strings. JSON requires double quotes. | {'a': 1} |
Frequently Asked Questions
How do I minify JSON?
Use the "Minify" button in the "More Options" toolbar. This removes all whitespace, newlines, and indentation to reduce the size of the data for transmission.
Is this tool secure?
Yes. All formatting and validation happen directly in your browser. No data is sent to any server.