Paste JSON and press Ctrl+Enter to format
Enter JSON and click Validate
Paste or upload JSON to format, minify, validate, or explore as a tree. Everything runs client-side — your data never leaves your browser.
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Frequently Asked Questions
What is JSON?
JSON (JavaScript Object Notation) is a lightweight data interchange format. It's easy for humans to read and write, and easy for machines to parse and generate. JSON is widely used in web APIs, configuration files, and data storage.
How do I format/beautify JSON?
Paste your JSON into the input panel and click "Format" or press Ctrl+Enter. The tool will add proper indentation and line breaks to make your JSON readable. You can choose between 2-space, 4-space, or tab indentation.
What's the difference between JSON and XML?
Both are data interchange formats, but JSON is generally more lightweight and easier to read. JSON uses key-value pairs and arrays, while XML uses tags. JSON is the preferred format for most modern web APIs.
How do I validate JSON?
Switch to "Validate" mode or paste your JSON and look at the status bar. The tool will immediately tell you if your JSON is valid or show the exact line and position of any syntax errors.
What does "minify" mean?
Minifying JSON removes all unnecessary whitespace, line breaks, and indentation. This reduces file size, which is useful for production environments where bandwidth matters. The data remains exactly the same.
What are common JSON syntax errors?
The most common errors include: trailing commas after the last item, single quotes instead of double quotes, unquoted keys, missing commas between items, and comments (JSON doesn't support comments).
Is my data safe using this tool?
Yes! This tool runs entirely in your browser using JavaScript. Your JSON data is never sent to any server. You can verify this by checking your browser's network tab — no data is transmitted.