Base64 Encode/Decode

How Base64 works

• Grouping: every 3 bytes (24 bits) are split into 4 groups of 6 bits.
• Alphabet: each 6-bit value maps to one character from A–Z, a–z, 0–9, +, /.
• Padding: if input length is not a multiple of 3, pad with 0 bits and append = or ==.
• Text safety: Base64 is for transporting binary over text channels; it is not encryption.