RFC 3629 - UTF-8, a transformation format of ISO 10646
RFC 3629 defines the UTF-8 character encoding, a transformation format of ISO 10646. It details encoding rules, byte sequence syntax, security considerations, etc. It is a fundamental standard for modern Internet text processing.
RFC 4648 - The Base16, Base32, and Base64 Data Encodings
RFC 4648 defines three commonly used base encoding schemes - Base16, Base32, and Base64. It provides detailed specifications of encoding algorithms, character sets, padding rules, and security considerations. Essential foundation for understanding JWT, MIME, URL encoding, and other technologies.