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FASTBASE64.COREUTILS(1) User Commands FASTBASE64.COREUTILS(1) NAME fastbase64.coreutils - base64 encode/decode data and print to standard out- put (coreutils compatible) SYNOPSIS fastbase64.coreutils [OPTIONS...] [INPUTFILE] DESCRIPTION fastbase64.coreutils encodes or decodes base64 data using the high-perfor- mance simdutf library, with options compatible with GNU coreutils base64, plus clearly marked fastbase64-specific extensions. By default, it encodes binary input to base64 output. On large files, it can be several times faster than standard base64 tools. fastbase64 extension (not present in GNU coreutils base64): If a second filename is provided, it is used as the output file. Otherwise, output goes to standard output. The -o option takes precedence over positional output file. OPTIONS -b, --break=NUM synonym to --wrap. (not in GNU coreutils base64) -w, --wrap=NUM Wrap encoded lines after NUM characters (default 76). Use 0 to dis- able line wrapping. -d, -D, --decode Decode input. -e, --encode Encode input (default). --ignore-garbage When decoding, ignore non-alphabet characters. -i, -n, --noerrcheck fastbase64 extension (not present in GNU coreutils base64): when de- coding, ignore non-alphabet characters (same as --ignore-garbage). -h, --help Display help message and exit. -o, --output=FILE fastbase64 extension (not present in GNU coreutils base64): output file (default: "-" for stdout). --version Output version information and exit. EXAMPLES Encode a file: fastbase64.coreutils myfile.txt Decode base64 data ignoring garbage: fastbase64.coreutils -d -i < encoded.txt SEE ALSO base64(1), fastbase64(1) AUTHOR Written by the simdutf development team. simdutf March 2026 FASTBASE64.COREUTILS(1)
NAME | SYNOPSIS | DESCRIPTION | OPTIONS | EXAMPLES | SEE ALSO | AUTHOR
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