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* Split up code blocks by moving text outside them. (This also ensures
that the Copy function makes sense. _See screenshot:_)
* <img width="380" alt="image"
* Remove the redundant list of default plugins and refer to the table
* Sort the table of plugins alphabetically. (It's easier to scan for a
  * _I suggest maintaining the sort when adding new items._
* Replace the enabled/disabled code in Default column with just Yes or
* Tabulate the "Other ways to use" section and remove redundant "as
* Correct the word Donators to Donors.
* Add a new section called _Troubleshooting_.

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SVGO logo

SVGO npm version Discord

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


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.


Via npm:

npm -g install svgo

Via yarn:

yarn global add svgo

CLI usage

Processing single files:

svgo one.svg two.svg -o one.min.svg two.min.svg

Processing directory of svg files, recursively using -f, --folder:

svgo -f ./path/to/folder/with/svg/files -o ./path/to/folder/with/svg/output

Help for advanced usage:

svgo --help


SVGO has a plugin-based architecture, separate plugins allows various xml svg optimizations. See built-in plugins. SVGO automatically loads configuration from svgo.config.js or from --config ./path/myconfig.js. Some general options can be configured via CLI.

// svgo.config.js
module.exports = {
  multipass: true, // boolean. false by default
  datauri: 'enc', // 'base64' (default), 'enc' or 'unenc'.
  js2svg: {
    indent: 2, // string with spaces or number of spaces. 4 by default
    pretty: true, // boolean, false by default
  plugins: [
    // set of built-in plugins enabled by default

    // enable built-in plugins by name

    // or by expanded notation which allows to configure plugin
      name: 'sortAttrs',
      params: {
        xmlnsOrder: 'alphabetical',

Default preset

When extending default configuration specify preset-default plugin to enable optimisations. Each plugin of default preset can be disabled or configured with "overrides" param.

module.exports = {
  plugins: [
      name: 'preset-default',
      params: {
        overrides: {
          // customize default plugin options
          inlineStyles: {
            onlyMatchedOnce: false,

          // or disable plugins
          removeDoctype: false,

The default preset includes plugins marked with 'Yes' in the plugin list below.

Custom plugin

It's also possible to specify a custom plugin:

const anotherCustomPlugin = require('./another-custom-plugin.js');
module.exports = {
  plugins: [
      name: 'customPluginName',
      params: {
        optionName: 'optionValue',
      fn: (ast, params, info) => {},

API usage

SVGO provides a few low level utilities.


The core of SVGO is optimize function.

const { optimize } = require('svgo');
const result = optimize(svgString, {
  // optional but recommended field
  path: 'path-to.svg',
  // all config fields are also available here
  multipass: true,
const optimizedSvgString =;


If you write a tool on top of SVGO you might need a way to load SVGO config.

const { loadConfig } = require('svgo');
const config = await loadConfig();

You can also specify a relative or absolute path and customize the current working directory.

const config = await loadConfig(configFile, cwd);


SVG won't scale when CSS is applied on it.

Observed Problem: I'm using my SVG files on a website. It looks like the rendered SVG doesn't scale when the dimensions are altered using CSS.

Possible Solution: Try disabling removeViewBox in the configuration. See issue #1128 for details and discussion.

Built-in plugins

Plugin Description Default
addAttributesToSVGElement adds attributes to an outer <svg> element
addClassesToSVGElement add classnames to an outer <svg> element
cleanupAttrs cleanup attributes from newlines, trailing, and repeating spaces Yes
cleanupEnableBackground remove or cleanup enable-background attribute when possible Yes
cleanupIds remove unused and minify used IDs Yes
cleanupListOfValues round numeric values in attributes that take a list of numbers (like viewBox or enable-background)
cleanupNumericValues round numeric values to the fixed precision, remove default px units Yes
collapseGroups collapse useless groups Yes
convertColors convert colors (from rgb() to #rrggbb, from #rrggbb to #rgb) Yes
convertEllipseToCircle convert non-eccentric <ellipse> to <circle> Yes
convertPathData convert Path data to relative or absolute (whichever is shorter), convert one segment to another, trim useless delimiters, smart rounding, and much more Yes
convertShapeToPath convert some basic shapes to <path> Yes
convertStyleToAttrs convert styles into attributes
convertTransform collapse multiple transforms into one, convert matrices to the short aliases, and much more Yes
inlineStyles move and merge styles from <style> elements to element style attributes Yes
mergePaths merge multiple Paths into one Yes
mergeStyles merge multiple style elements into one Yes
minifyStyles minify <style> elements content with CSSO Yes
moveElemsAttrsToGroup move elements' attributes to their enclosing group Yes
moveGroupAttrsToElems move some group attributes to the contained elements Yes
prefixIds prefix IDs and classes with the SVG filename or an arbitrary string
removeAttributesBySelector removes attributes of elements that match a CSS selector
removeAttrs remove attributes by pattern
removeComments remove comments Yes
removeDesc remove <desc> Yes
removeDimensions remove width/height and add viewBox if it's missing (opposite to removeViewBox, disable it first)
removeDoctype remove doctype declaration Yes
removeEditorsNSData remove editors namespaces, elements, and attributes Yes
removeElementsByAttr remove arbitrary elements by ID or className
removeEmptyAttrs remove empty attributes Yes
removeEmptyContainers remove empty Container elements Yes
removeEmptyText remove empty Text elements Yes
removeHiddenElems remove hidden elements Yes
removeMetadata remove <metadata> Yes
removeNonInheritableGroupAttrs remove non-inheritable group's "presentation" attributes Yes
removeOffCanvasPaths removes elements that are drawn outside of the viewbox
removeRasterImages remove raster images
removeScriptElement remove <script> elements
removeStyleElement remove <style> elements
removeTitle remove <title> Yes
removeUnknownsAndDefaults remove unknown elements content and attributes, remove attributes with default values Yes
removeUnusedNS remove unused namespaces declaration Yes
removeUselessDefs remove elements of <defs> without id Yes
removeUselessStrokeAndFill remove useless stroke and fill attributes Yes
removeViewBox remove viewBox attribute when possible Yes
removeXMLNS removes the xmlns attribute (for inline SVG)
removeXMLProcInst remove XML processing instructions Yes
reusePaths Find duplicated elements and replace them with links
sortAttrs sort element attributes for epic readability Yes
sortDefsChildren sort children of <defs> in order to improve compression Yes

Other ways to use SVGO

Method Reference
Web app SVGOMG
GitHub Action SVGO Action
Grunt task grunt-svgmin
Gulp task gulp-svgmin
Mimosa module mimosa-minify-svg
OSX Folder Action svgo-osx-folder-action
Webpack loader image-webpack-loader
Telegram Bot svgo_bot
PostCSS plugin postcss-svgo
Inkscape plugin inkscape-svgo
Sketch plugin svgo-compressor
macOS app Image Shrinker
Rollup plugin rollup-plugin-svgo
VS Code plugin vscode-svgo
Atom plugin atom-svgo
Sublime plugin Sublime-svgo
Figma plugin Advanced SVG Export
Linux app Oh My SVG
Browser extension SVG Gobbler
API Vector Express


SheetJS LLC Fontello

License and Copyright

This software is released under the terms of the MIT license.

Logo by André Castillo.