This page lets you easily generate a time-based one time password (TOTP) entirely in the web browser in case you ever lose access to your phone.
It uses the excellent otpauth package, downloaded from raw.githubusercontent.com/hectorm/otpauth/master/dist/otpauth.umd.min.js.
You can provide the key in the URL using the URI fragment or a query parameter, for example: https://totp.danhersam.com/#/KEY or https://totp.danhersam.com?key=KEY
You can also pass the token digits, period and algorithm using a query string in the URL, for example: https://totp.danhersam.com/?digits=6&period=60&algorithm=SHA256&key=KEY
See supported hashing algorithms for the complete list.
To make it easier to import Authy entries into another authenticator app, generate QR codes using my QR code generator.