Password Calculator

This app generates a password from your secret string.
It is impossible to guess the original string from the generated password!
Because the well-known algorithm of SHA-256 is used, even if this app cannot be used, other services can generate the same password again.

【algorithm】
Encode the original string into UTF-8 and make it binary
Hashing with SHA-256
Convert to string with base64
Extract a specified number of characters from the beginning
If the symbol is required, shift the extracted character string until the symbol is included