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BASE64(1) User Commands BASE64(1) NAME base64 - base64 encode/decode data and print to standard output SYNOPSIS base64 [OPTION]... [FILE] DESCRIPTION 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 dis- able 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 Written by Simon Josefsson. REPORTING BUGS 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 Copyright (C) 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 basenc(1) Full documentation <https://www.gnu.org/software/coreutils/base64> or available locally via: info '(coreutils) base64 invocation' GNU coreutils 9.9 November 2025 BASE64(1)
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