Supports traditional and URL-safe variants, with or without padding Rejects non-canonical padding Constant-time (best-effort), suitable for encoding/decoding secrets Characters can be ignored by the ...

encodeString(input: string): string Convert any UTF-8 string → Base64. decodeToString(b64: string): string Decode Base64 → UTF-8 string. decodeToBytes(b64: string): string Base64 → binary bytes ...