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NAME | SYNOPSIS | DESCRIPTION | ENCODING EXAMPLES | AUTHOR | REPORTING BUGS | COPYRIGHT | SEE ALSO | COLOPHON |
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BASENC(1) User Commands BASENC(1)
basenc - Encode/decode data and print to standard output
basenc [OPTION]... [FILE]
basenc 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.
]8;;https://www.gnu.org/software/coreutils/manual/coreutils.html#basenc--base64\--base64]8;;\
same as 'base64' program (RFC4648 section 4)
]8;;https://www.gnu.org/software/coreutils/manual/coreutils.html#basenc--base64url\--base64url]8;;\
file- and url-safe base64 (RFC4648 section 5)
]8;;https://www.gnu.org/software/coreutils/manual/coreutils.html#basenc--base58\--base58]8;;\
visually unambiguous base58 encoding
]8;;https://www.gnu.org/software/coreutils/manual/coreutils.html#basenc--base32\--base32]8;;\
same as 'base32' program (RFC4648 section 6)
]8;;https://www.gnu.org/software/coreutils/manual/coreutils.html#basenc--base32hex\--base32hex]8;;\
extended hex alphabet base32 (RFC4648 section 7)
]8;;https://www.gnu.org/software/coreutils/manual/coreutils.html#basenc--base16\--base16]8;;\
hex encoding (RFC4648 section 8)
]8;;https://www.gnu.org/software/coreutils/manual/coreutils.html#basenc--base2msbf\--base2msbf]8;;\
bit string with most significant bit (msb) first
]8;;https://www.gnu.org/software/coreutils/manual/coreutils.html#basenc--base2lsbf\--base2lsbf]8;;\
bit string with least significant bit (lsb) first
]8;;https://www.gnu.org/software/coreutils/manual/coreutils.html#basenc-d\-d, --decode]8;;\
decode data
]8;;https://www.gnu.org/software/coreutils/manual/coreutils.html#basenc-i\-i, --ignore-garbage]8;;\
when decoding, ignore non-alphabet characters
]8;;https://www.gnu.org/software/coreutils/manual/coreutils.html#basenc-w\-w, --wrap=COLS]8;;\
wrap encoded lines after COLS character (default 76). Use
0 to disable line wrapping
]8;;https://www.gnu.org/software/coreutils/manual/coreutils.html#basenc--z85\--z85]8;;\ ascii85-like encoding (ZeroMQ spec:32/Z85); when encoding,
input length must be a multiple of 4; when decoding, input
length must be a multiple of 5
]8;;https://www.gnu.org/software/coreutils/basenc#basenc--help\--help]8;;\ display this help and exit
]8;;https://www.gnu.org/software/coreutils/basenc#basenc--version\--version]8;;\
output version information and exit
When decoding, the input may contain newlines in addition to the
bytes of the formal alphabet. Use --ignore-garbage to attempt to
recover from any other non-alphabet bytes in the encoded stream.
$ printf '\376\117\202' | basenc --base64
/k+C
$ printf '\376\117\202' | basenc --base64url
_k-C
$ printf '\376\117\202' | basenc --base32
7ZHYE===
$ printf '\376\117\202' | basenc --base32hex
VP7O4===
$ printf '\376\117\202' | basenc --base16
FE4F82
$ printf '\376\117\202' | basenc --base2lsbf
011111111111001001000001
$ printf '\376\117\202' | basenc --base2msbf
111111100100111110000010
$ printf '\376\117\202\000' | basenc --z85
@.FaC
Written by Simon Josefsson and Assaf Gordon.
Report bugs to: bug-coreutils@gnu.org
GNU coreutils home page: <https://www.gnu.org/software/coreutils/>
General help using GNU software: <https://www.gnu.org/gethelp/>
Report any translation bugs to
<https://translationproject.org/team/>
Copyright © 2026 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/basenc>
or available locally via: info '(coreutils) basenc invocation'
This page is part of the coreutils (basic file, shell and text
manipulation utilities) project. Information about the project
can be found at ⟨http://www.gnu.org/software/coreutils/⟩. If you
have a bug report for this manual page, see
⟨http://www.gnu.org/software/coreutils/⟩. This page was obtained
from the tarball coreutils-9.11.tar.xz fetched from
⟨http://ftp.gnu.org/gnu/coreutils/⟩ on 2026-05-24. If you
discover any rendering problems in this HTML version of the page,
or you believe there is a better or more up-to-date source for the
page, or you have corrections or improvements to the information
in this COLOPHON (which is not part of the original manual page),
send a mail to man-pages@man7.org
GNU coreutils 9.11 April 2026 BASENC(1)
Pages that refer to this page: base32(1), base64(1)
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HTML rendering created 2026-05-24 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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