JSON Formatter & Validator
RunDev
Paste your JSON below to format, validate, or minify it. All processing happens in your browser.Updated 2026-03-11
Ctrl+Enter Run Ctrl+Shift+C Copy output
Frequently Asked Questions
Is this tool free to use?
Yes, completely free. All processing happens in your browser — no data is sent to any server.
Do I need to create an account?
No account or signup required. Just open the tool and start using it immediately.
Is my data safe?
Yes. Everything runs locally in your browser. Your data never leaves your device.
How to Use
- Click Process or press Ctrl+Enter
- Select formatting options
- Paste your code or data into the input
- Copy the formatted result
FAQ
Can I integrate this into my workflow?
Bookmark for quick access. The URL updates with settings for sharing configurations.
Does it validate input?
Yes, input is validated and clear error messages are shown for any issues.
Is the output production-ready?
Yes, generates clean, standards-compliant output suitable for production use.
What browsers are supported?
All modern browsers: Chrome, Firefox, Safari, Edge. Some features need recent versions.
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