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base64 encode/decode data and print to standard output


base64 [OPTION]... [FILE]

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echo TFpTQgo= | base64 -d


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


Copyright © 2012 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.

reporting bugs

Report base64 bugs to bug-coreutils[:at:]gnu[:dot:]org
GNU coreutils home page: <>
General help using GNU software: <>
Report base64 translation bugs to <>

see also

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.


Written by Simon Josefsson.

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