Base64 Encoder / Decoder – Text & File

URL-safe (- and _ instead of + and /)

Line breaks every 76 chars

Input

Output

Base64 Quick Facts

Alphabet

A–Z, a–z, 0–9, +, /

URL-safe alphabet

A–Z, a–z, 0–9, -, _

Padding

= (1 or 2 chars)

Size overhead

~33% larger than input

Line length (MIME)

76 chars per line

Bits per char

6 bits → 1 char