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Online JSON Formatter

Online JSON Formatter, Validator and Beautififer

1
Paste your JSON, XML, or YAML here...
OutputEMPTY
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Formatted output will appear here...

What is JSON Formatter?

Our JSON Formatter is a powerful tool designed to help developers debug, validate, and minify JSON data. Whether you are an API developer, data scientist, or web engineer, properly formatted code is essential for readability and error checking.

Secure & Client-Side

Unlike other tools, Online JSON Formatter processes your data entirely in your browser using local JavaScript. Your code is never sent to any server, ensuring 100% privacy and security for your sensitive data, keys, or configurations.

Multi-Language Support

Beyond JSON, we support complete validation and formatting for:

  • XML (Extensible Markup Language)
  • YAML (YAML Ain't Markup Language)
  • Properties (Java/Env Configuration)

Frequently Asked Questions

How do I validate JSON?

Simply paste your code into the editor. The tool automatically detects the format. Click "Validate" to run a strict syntax check and identify exact error lines.

Is there a limit on file size?

Since we use your browser's memory, you can process very large files (up to 100MB+) depending on your device's RAM, without any network latency.