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Email SupportDevKit Pro is a mobile app that provides essential developer tools including JSON formatting, JWT decoding, Base64 encoding, QR code generation, and timestamp conversion - all in one convenient place.
Yes! All processing happens locally on your device, your data never leaves your phone. For more information, see our Privacy Policy.
DevKit Pro is available for iOS (iPhone and iPad) and Android devices.
The free version includes all tools with a limit of 5 uses per tool per day. Usage resets daily at midnight. History is limited to the last 10 items.
Unlimited gives you unlimited access to all tools, priority support, and unlimited history. Choose monthly ($9.99) or annual ($79 - save 34%).
iOS: Settings → [Your Name] → Subscriptions → DevKit Pro → Cancel Subscription
Android: Play Store → Menu → Subscriptions → DevKit Pro → Cancel Subscription
Refunds are handled by Apple or Google according to their refund policies. Contact Apple or Google support to request a refund within the first 48 hours of purchase.
Yes! If you use the same Apple ID or Google account, your Unlimited subscription automatically works on all your devices.
Paste or type your JSON into the input field. Tap "Format" to beautify it, or "Minify" to compress it. The validator will highlight any syntax errors.
Paste your JWT token into the input field. The app will automatically decode and display the header, payload, and signature.
Each tool will automatically save your work to history. Your history is stored locally on your device and accessible from the History tab.
Yes! Most tools have a "Copy" or "Share"button. For QR codes, you can save to your camera roll or share directly.
Try these steps:
Try these steps:
History is stored locally on your device. If you uninstalled the app, cleared app data, or switched devices, your history will be lost. Unlimited subscriptions sync across devices, but history does not.
Double-check your input for errors. If you believe there's a bug, please email us with: (1) the tool you're using, (2) your input, (3) the actual output, and (4) what you expected.
We collect minimal data - only anonymous usage statistics and crash reports to improve the app. All tool processing happens locally. See our Privacy Policy for details.
Since all processing happens locally on your device, it's generally safe. However, we recommend not storing highly sensitive data (passwords, API keys, etc.) in history or favorites.
You can clear history within the app. To delete all data, simply uninstall the app from your device.
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