Base45 Encode / Decode
Encode text to RFC 9285 Base45 or decode Base45 back to text, as used in QR-code data payloads.
Related
A1Z26 Letter-Number Cipher
Convert letters to their alphabet position numbers (A=1…Z=26) and back.
Encoding
Affine Cipher
Encrypt/decrypt with the affine cipher E(x)=(a·x+b) mod 26, including key validity checks.
Encoding
ASCII / Code Point Converter
Convert text to ASCII/Unicode code point numbers and convert numeric lists back to text.
Encoding
ASCII ↔ EBCDIC Converter
Convert text between ASCII/Latin-1 and IBM EBCDIC code pages, byte for byte.
Encoding