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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 |
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 |
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) |
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) |
removeStyleElement | remove <style> elements (disabled by default) |
removeScriptElement | remove <script> elements (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 : Enable multipass
--pretty : Make SVG pretty printed
--indent=INDENT : Indent number when pretty printing SVGs
-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
.svgz
to.svg
:$ gunzip -c test.svgz | svgo -i - -o test.min.svg
from
.svg
to.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 macOS app - Image Shrinker
License and Copyright
This software is released under the terms of the MIT license.
Logo by Yegor Bolshakov.