The camera will not scan
Camera permission is needed for scanning. Review QR Code Tool’s camera permission in Android app settings; labels differ by phone. Make sure the code is visible, well lit and not cut off.
A scanned result looks unfamiliar
Review the result before opening it. A QR code can contain a misleading link. Check the destination and avoid entering passwords or payment details on an unexpected page.
A code you created will not scan
Check the information you entered, keep the entire code and its border visible, and test the exported image with another device. If you report a problem, describe the content type rather than sending private Wi-Fi details or personal information.
History and saved codes
Recent results are stored locally. Clearing app data or uninstalling can remove local history. Keep a separate copy of any generated code you need.
Contact app support
Include the app version, device model, Android version, exact error and steps to reproduce. Hide personal information in screenshots.