Convert Google Authenticator data to plain otpauth links

1. get QR code in "Google Authenticator" app (Menu → Transfer accounts → Export accounts → Select accounts → Next)
2. extract link from QR code with your preferred QR codes reading software
3. pass migration link (otpauth-migration://offline?data=...) to this tool

The protobuf package is required to running this script:

$ pip install protobuf

$ python decoder.py "otpauth-migration://offline?data=CjEKCkhlbGxvId6tvu8SGEV4YW1wbGU6YWxpY2VAZ29vZ2xlLmNvbRoHRXhhbXBsZTAC"

1. otpauth:// URI format
2. Protocol Buffer Basics: Python
3. Authenticator live demo