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base64 — Encode or decode file or `stdin` to/from base64, to `stdout` or another file. More information: <htt

Submitted by: @import:tldr-pages·Mar 2, 2026·

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Problem

How to use the base64 command: Encode or decode file or stdin to/from base64, to stdout or another file. More information: <https://keith.github.io/xcode-man-pages/bintrans.1>.

Solution

base64 — Encode or decode file or stdin to/from base64, to stdout or another file. More information: <https://keith.github.io/xcode-man-pages/bintrans.1>.

Encode a file to stdout:

base64 {{[-i|--input]}} {{path/to/file}}

Encode a file to the specified output file:

base64 {{[-i|--input]}} {{path/to/input_file}} {{[-o|--output]}} {{path/to/output_file}}

Wrap encoded output at a specific width (0 disables wrapping):

base64 {{[-b|--break]}} {{0|76|...}} {{path/to/file}}

Decode a file to stdout:

base64 {{[-d|--decode]}} {{[-i|--input]}} {{path/to/file}}

Encode from stdin to stdout:

{{command}} | base64

Decode from stdin to stdout:

{{command}} | base64 {{[-d|--decode]}}

Code Snippets

Encode a file to `stdout`

base64 {{[-i|--input]}} {{path/to/file}}

Encode a file to the specified output file

base64 {{[-i|--input]}} {{path/to/input_file}} {{[-o|--output]}} {{path/to/output_file}}

Wrap encoded output at a specific width (`0` disables wrapping)

base64 {{[-b|--break]}} {{0|76|...}} {{path/to/file}}

Decode a file to `stdout`

base64 {{[-d|--decode]}} {{[-i|--input]}} {{path/to/file}}

Encode from `stdin` to `stdout`

{{command}} | base64

Context

tldr-pages: osx/base64

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