Choose Encode or Decode. Encoding wraps your text in a begin 644 … / end block using the traditional uuencode alphabet; decoding reads that block back to text.
A historic Unix encoding that packs 3 bytes into 4 printable characters (each 6-bit value plus 0x20), used to send binary data over text-only email and Usenet.
'begin <mode> <name>' starts the stream with a file permission mode and name; a line with a single grave and 'end' close it. This tool includes them automatically.
Yes — zero values may be written as a backtick instead of a space, and the decoder accepts both.