FASTBASE64(1)

FASTBASE64(1) — the User Commands manual, but make it cute 💅

🌸 NAME 🌸

fastbase64 — base64 encode/decode data and print to standard output. That's the whole name, bestie, no notes. 💖

✨ SYNOPSIS ✨

Here's the shape of it:

fastbase64 [-Ddh] [-b num] [-i in_file] [-o out_file]

💅 DESCRIPTION 💅

Okay so fastbase64 encodes or decodes base64 data using the high-performance simdutf library. Default vibe: it encodes binary input to base64 output. On large files, it can be several times faster than standard base64 tools. No cap.

If a second filename is provided, it is used as the output file. Otherwise, output goes to standard output. Slay. 🦋

🎀 OPTIONS 🎀

• -b, --break num — break encoded output up into lines of length num (default 0, meaning no breaks). Line-wrapping but make it your problem, bestie.
• -D, -d, --decode — decode input. All three aliases are giving the same decode energy.
• -h, --help — display this message. Iconic of it.
• -i, --input in_file — input file (default: "-" for stdin).
• -o, --output out_file — output file (default: "-" for stdout).
• -w, --wrap=NUM — same as -b. Literally the same thing, just a different flag moment.
• -e, --encode — encode input (default). If you don't say decode, this is what's happening.
• --ignore-garbage — when decoding, ignore non-alphabet characters. It's giving "filter out the noise" energy, fr fr.
• --version — output version information and exit. Bye bestie 👋

🔥 EXAMPLES 🔥

Encode a file (default, no wrapping):

fastbase64 -i myfile.txt

Decode base64 data:

fastbase64 -d -i encoded.txt

Encode with custom line wrapping:

fastbase64 -b 76 -i myfile.txt

🫶 SEE ALSO 🫶

Go check out these icons: base64(1), fastbase64.coreutils(1), iconv(1). Bestie cross-references, periodt. 🌈

👑 AUTHOR 👑

Written by the simdutf development team. Crown them, honestly. 💜

Okay bye bestie — this page is from simdutf, dated March 2026, and it's the FASTBASE64(1) manual signing off. Mwah 💋✨