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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.
-d, --decode
decode data
-i, --ignore-garbage
when decoding, ignore non-alphabet characters
-w, --wrap=COLS
wrap encoded lines after COLS character (default 76). Use 0 to disable line wrapping
display this help and exit
output version information and exit
With no FILE, or when FILE is -, read standard input.
The data are encoded as described for the base64 alphabet in RFC 3548. 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.


Report base64 bugs to
GNU coreutils home page: <>
General help using GNU software: <>
Report base64 translation bugs to <>


Copyright © 2011 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <>.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.


The full documentation for base64 is maintained as a Texinfo manual. If the info and base64 programs are properly installed at your site, the command
info coreutils 'base64 invocation'
should give you access to the complete manual.
September 2011 GNU coreutils 8.12.197-032bb