svgo

TLDR

Optimize a file using the default plugins (overwrites the original file)

$ svgo [test.svg]

Optimize a file and save the result to another file

$ svgo [test.svg] -o [test.min.svg]

Optimize all SVG files within a directory (overwrites the original files)

$ svgo -f [path/to/directory/with/svg/files]

Optimize all SVG files within a directory and save the resulting files to another directory

$ svgo -f [path/to/input/directory] -o [path/to/output/directory]

Optimize SVG content passed from another command, and save the result to a file

$ [cat test.svg] | svgo -i - -o [test.min.svg]

Optimize a file and print out the result

$ svgo [test.svg] -o -

Usage: svgo [options] [INPUT...]

Nodejs-based tool for optimizing SVG vector graphics files

Arguments:
  INPUT                      Alias to --input

Options:
  -v, --version              output the version number
  -i, --input      Input files, "-" for STDIN
  -s, --string       Input SVG data string
  -f, --folder       Input folder, optimize and rewrite all *.svg files
  -o, --output    Output file or folder (by default the same as the
                             input), "-" for STDOUT
  -p, --precision   Set number of digits in the fractional part,
                             overrides plugins params
  --config           Custom config file, only .js is supported
  --datauri          Output as Data URI string (base64), URI encoded
                             (enc) or unencoded (unenc)
  --multipass                Pass over SVGs multiple times to ensure all
                             optimizations are applied
  --pretty                   Make SVG pretty printed
  --indent          Indent number when pretty printing SVGs
  --eol                 Line break to use when outputting SVG: lf, crlf.
                             If unspecified, uses platform default.
  --final-newline            Ensure SVG ends with a line break
  -r, --recursive            Use with '--folder'. Optimizes *.svg files in
                             folders recursively.
  --exclude      Use with '--folder'. Exclude files matching
                             regular expression pattern.
  -q, --quiet                Only output error messages, not regular status
                             messages
  --show-plugins             Show available plugins and exit
  --no-color                 Output plain text without color
  -h, --help                 display help for command