Free JSON Viewer Tool - The #1 Best JSON Formatter & Validator Online

Paste in your JSON, get it formatted and validated instantly. Built for developers who just want their data readable without the fluff.

Perfect for debugging APIs or just making sense of that massive config file someone dumped in Slack.

Why I built this

Like most developers, I got tired of JSON viewers that were either painfully slow or cluttered with ads. So I built my own.

Privacy & Security - Your Data Stays Private

• ✅ All JSON processing happens locally in your browser
• ✅ No data is sent to any server or external service
• ✅ No analytics, tracking, or data collection
• ✅ No registration required
• ✅ Works offline
• ✅ No ads

Feedback & Contact

Have feedback or suggestions for improving this free JSON tool? Get in touch I'd love to hear from you! Or consider buying me a coffee to support the development!