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SVGO 
SVG Optimizer is a Nodejs-based tool for optimizing SVG vector graphics files.
Why?
SVG files, especially those exported from various editors, usually contain a lot of redundant and useless information. This can include editor metadata, comments, hidden elements, default or non-optimal values and other stuff that can be safely removed or converted without affecting the SVG rendering result.
What it can do
SVGO has a plugin-based architecture, so almost every optimization is a separate plugin.
Today we have:
| Plugin | Description |
|---|---|
| cleanupAttrs | cleanup attributes from newlines, trailing, and repeating spaces |
| inlineStyles | move and merge styles from <style> elements to element style attributes |
| removeDoctype | remove doctype declaration |
| removeXMLProcInst | remove XML processing instructions |
| removeComments | remove comments |
| removeMetadata | remove <metadata> |
| removeTitle | remove <title> |
| removeDesc | remove <desc> |
| removeUselessDefs | remove elements of <defs> without id |
| removeXMLNS | removes xmlns attribute (for inline svg, disabled by default) |
| removeEditorsNSData | remove editors namespaces, elements, and attributes |
| removeEmptyAttrs | remove empty attributes |
| removeHiddenElems | remove hidden elements |
| removeEmptyText | remove empty Text elements |
| removeEmptyContainers | remove empty Container elements |
| removeViewBox | remove viewBox attribute when possible |
| cleanupEnableBackground | remove or cleanup enable-background attribute when possible |
| minifyStyles | minify <style> elements content with CSSO |
| convertStyleToAttrs | convert styles into attributes |
| convertColors | convert colors (from rgb() to #rrggbb, from #rrggbb to #rgb) |
| convertPathData | convert Path data to relative or absolute (whichever is shorter), convert one segment to another, trim useless delimiters, smart rounding, and much more |
| convertTransform | collapse multiple transforms into one, convert matrices to the short aliases, and much more |
| removeUnknownsAndDefaults | remove unknown elements content and attributes, remove attrs with default values |
| removeNonInheritableGroupAttrs | remove non-inheritable group's “presentation” attributes |
| removeUselessStrokeAndFill | remove useless stroke and fill attrs |
| removeUnusedNS | remove unused namespaces declaration |
| prefixIds | prefix IDs and classes with the SVG filename or an arbitrary string |
| cleanupIDs | remove unused and minify used IDs |
| cleanupNumericValues | round numeric values to the fixed precision, remove default px units |
| cleanupListOfValues | round numeric values in attributes that take a list of numbers (like viewBox or enable-background) |
| moveElemsAttrsToGroup | move elements' attributes to their enclosing group |
| moveGroupAttrsToElems | move some group attributes to the contained elements |
| collapseGroups | collapse useless groups |
| removeRasterImages | remove raster images (disabled by default) |
| mergePaths | merge multiple Paths into one |
| convertShapeToPath | convert some basic shapes to <path> |
| sortAttrs | sort element attributes for epic readability (disabled by default) |
| removeDimensions | remove width/height attributes if viewBox is present (opposite to removeViewBox, disable it first) (disabled by default) |
| removeAttrs | remove attributes by pattern (disabled by default) |
| removeAttributesBySelector | removes attributes of elements that match a css selector (disabled by default) |
| removeElementsByAttr | remove arbitrary elements by ID or className (disabled by default) |
| addClassesToSVGElement | add classnames to an outer <svg> element (disabled by default) |
| addAttributesToSVGElement | adds attributes to an outer <svg> element (disabled by default) |
| removeOffCanvasPaths | removes elements that are drawn outside of the viewbox (disabled by default) |
| removeStyleElement | remove <style> elements (disabled by default) |
| removeScriptElement | remove <script> elements (disabled by default) |
| reusePaths | Find duplicated elements and replace them with links (disabled by default) |
Want to know how it works and how to write your own plugin? Of course you want to. (동작방법)
Installation
$ [sudo] npm install -g svgo
Usage
CLI
Usage: svgo [OPTIONS] [ARGS] Options: -h, --help : Help -v, --version : Version -i INPUT, --input=INPUT : Input file, "-" for STDIN -s STRING, --string=STRING : Input SVG data string -f FOLDER, --folder=FOLDER : Input folder, optimize and rewrite all *.svg files -o OUTPUT, --output=OUTPUT : Output file or folder (by default the same as the input), "-" for STDOUT -p PRECISION, --precision=PRECISION : Set number of digits in the fractional part, overrides plugins params --config=CONFIG : Config file or JSON string to extend or replace default --disable=PLUGIN : Disable plugin by name, "--disable=PLUGIN1,PLUGIN2" for multiple plugins --enable=PLUGIN : Enable plugin by name, "--enable=PLUGIN3,PLUGIN4" for multiple plugins --datauri=DATAURI : Output as Data URI string (base64, URI encoded or unencoded) --multipass : Pass over SVGs multiple times to ensure all optimizations are applied --pretty : Make SVG pretty printed --indent=INDENT : Indent number when pretty printing SVGs -r, --recursive : Use with '-f'. Optimizes *.svg files in folders recursively. -q, --quiet : Only output error messages, not regular status messages --show-plugins : Show available plugins and exit Arguments: INPUT : Alias to --input
with files:
$ svgo test.svg
or:
$ svgo *.svg
$ svgo test.svg -o test.min.svg
$ svgo test.svg other.svg third.svg
$ svgo test.svg other.svg third.svg -o test.min.svg -o other.min.svg -o third.min.svg
with STDIN / STDOUT:
$ cat test.svg | svgo -i - -o - > test.min.svg
with folder
$ svgo -f ../path/to/folder/with/svg/files
or:
$ svgo -f ../path/to/folder/with/svg/files -o ../path/to/folder/with/svg/output
$ svgo *.svg -o ../path/to/folder/with/svg/output
with strings:
$ svgo -s '<svg version="1.1">test</svg>' -o test.min.svg
or even with Data URI base64:
$ svgo -s 'data:image/svg+xml;base64,...' -o test.min.svg
with SVGZ:
from
.svgzto.svg:$ gunzip -c test.svgz | svgo -i - -o test.min.svg
from
.svgto.svgz:$ svgo test.svg -o - | gzip -cfq9 > test.svgz
Other Ways to Use SVGO
- as a web app – SVGOMG
- as a Nodejs module – examples
- as a Grunt task – grunt-svgmin
- as a Gulp task – gulp-svgmin
- as a Mimosa module – mimosa-minify-svg
- as an OSX Folder Action – svgo-osx-folder-action
- as a webpack loader – image-webpack-loader
- as a Telegram Bot – svgo_bot
- as a PostCSS plugin – postcss-svgo
- as an Inkscape plugin – inkscape-svgo
- as a Sketch plugin - svgo-compressor
- as macOS app - Image Shrinker
- as a Rollup plugin - rollup-plugin-svgo
License and Copyright
This software is released under the terms of the MIT license.
Logo by Yegor Bolshakov.