o-o o   o o--o o-o
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o-o   o   o--o o-o
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          o--o

SVGO

SVG Optimizer is a Nodejs-based tool for optimizing SVG vector graphics files.

Why?

SVG files, especially exported from various editors, usually contains a lot of redundant and useless information such as editor metadata, comments, hidden elements and other stuff that can be safely removed without affecting SVG rendering result.

What it can do

SVGO has a plugin-based architecture, so almost every optimization is a separate plugin.

Today we have:

• [ > ] cleanup attributes from newlines, trailing and repeating spaces
• [ > ] remove doctype declaration
• [ > ] remove XML processing instructions
• [ > ] remove comments
• [ > ] remove metadata
• [ > ] remove editors namespaces, elements and attributes
• [ > ] remove empty attributes
• [ > ] remove default "px" unit
• [ > ] remove a lot of hidden elements
• [ > ] remove empty Text elements
• [ > ] remove empty Container elements
• [ > ] remove viewBox attribute
• [ > ] remove or cleanup enable-background attribute
• [ > ] cleanup SVG element from useless attributes
• [ > ] convert styles into attributes
• [ > ] convert colors (from rgb() to #rrggbb, from #rrggbb to #rgb)
• [ > ] convert Path data to relative, trim useless delimiters and much more
• [ > ] move elements attributes to the existing group wrapper
• [ > ] collapse groups

But it's not only about rude removing, SVG has a strict specification with a lot of opportunities for optimizations, default values, geometry hacking and more.

How-to instructions and plugins API docs will coming ASAP.

How to use

npm install -g svgo

Usage:
  svgo [OPTIONS] [ARGS]


Options:
  -h, --help : Help
  -v, --version : Version
  -i INPUT, --input=INPUT : Input: stdin (default) | filename | Data URI base64 string
  -o OUTPUT, --output=OUTPUT : Output: stdout (default) | filename
  -c CONFIG, --config=CONFIG : Local config file to extend default
  --disable=DISABLE : Disable plugin by name
  --enable=ENABLE : Enable plugin by name
  --datauri : Output as Data URI base64 string
  --pretty : Make SVG pretty printed
  --test : Make a visual comparison of two files (PhantomJS pre-required)

With files:

svgo -i test.svg -o test.min.svg

With stdin / stdout:

cat test.svg | svgo -d removeDoctype -d removeComment > test.min.svg

With Data URI base64 strings:

svgo -i 'data:image/svg+xml;base64,…' -o test.min.svg

TODO

1. documentation and "plugins how-to"
2. more plugins
3. more unit tests
4. online SVGO web service
5. …