base64(1) — Linux manual page

BASE64(1)                     User Commands                     BASE64(1)

NAME         top

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

SYNOPSIS         top

       base64 [OPTION]... [FILE]

DESCRIPTION         top

       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.

       -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

       --help display this help and exit

       --version
              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.

AUTHOR         top

       Written by Simon Josefsson.

REPORTING BUGS         top

       GNU coreutils online help:
       <https://www.gnu.org/software/coreutils/>
       Report any translation bugs to
       <https://translationproject.org/team/>

COPYRIGHT         top

       Copyright © 2025 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.

SEE ALSO         top

       basenc(1)

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

COLOPHON         top

       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
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       ⟨http://ftp.gnu.org/gnu/coreutils/⟩ on 2025-08-11.  If you
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       send a mail to man-pages@man7.org

GNU coreutils 9.7               April 2025                      BASE64(1)

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