EncodeToString / DecodeString
s := base32.StdEncoding.EncodeToString([]byte("hello"))
fmt.Println(s) // "NBSWY3DP"
b, _ := base32.StdEncoding.DecodeString(s)
fmt.Println(string(b))encoding/base32
Base32 encoding. Same API shape as encoding/base64 — pick base32 when you need case-insensitive output (e.g., TOTP secrets, some filenames).
The four encodings
StdEncoding (A–Z2–7, RFC 4648), HexEncoding (0–9A–V, extended hex), plus their Raw* variants without padding.