BASE64(1) User Commands BASE64(1)

base64 - base64 encode/decode data and print to standard output

base64 [OPTION]... [FILE]

Base64 encode or decode FILE, or standard input, to standard output.

With no FILE, or when FILE is -, read standard input.

Mandatory arguments to long options are mandatory for short options too.

decode data
when decoding, ignore non-alphabet characters
wrap encoded lines after COLS character (default 76). Use 0 to disable line wrapping
display this help and exit
output version information and exit

The data are encoded as described for the base64 alphabet in RFC 4648. When decoding, the input may contain newlines in addition to the bytes of the formal base64 alphabet. Use --ignore-garbage to attempt to recover from any other non-alphabet bytes in the encoded stream.

Written by Simon Josefsson.

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Copyright © 2022 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later https://gnu.org/licenses/gpl.html.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.

Full documentation https://www.gnu.org/software/coreutils/base64
or available locally via: info '(coreutils) base64 invocation'

November 2022 GNU coreutils 9.1