🔐 RFC 4648 Base32 & 2FA Secret Key Encoder
Base32 Encoder & Decoder
Convert plaintext strings to RFC 4648 Base32 and decode 2FA TOTP secret keys with 100% in-browser privacy.
Input
RFC 4648 Base32 Alphabet
Base32 encodes arbitrary binary data using 32 human-friendly ASCII characters: A-Z (indices $0$–$25$) and 2-7 (indices $26$–$31$). Every 5 bytes ($40\text{ bits}$) of input data yields exactly 8 Base32 characters.