**SVG O**ptimizer 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.
| [cleanupAttrs](https://github.com/svg/svgo/blob/master/plugins/cleanupAttrs.js) | cleanup attributes from newlines, trailing, and repeating spaces | `enabled` |
| [inlineStyles](https://github.com/svg/svgo/blob/master/plugins/inlineStyles.js) | move and merge styles from `<style>` elements to element `style` attributes | `enabled` |
| [removeHiddenElems](https://github.com/svg/svgo/blob/master/plugins/removeHiddenElems.js) | remove hidden elements | `enabled` |
| [removeEmptyText](https://github.com/svg/svgo/blob/master/plugins/removeEmptyText.js) | remove empty Text elements | `enabled` |
| [removeEmptyContainers](https://github.com/svg/svgo/blob/master/plugins/removeEmptyContainers.js) | remove empty Container elements | `enabled` |
| [removeViewBox](https://github.com/svg/svgo/blob/master/plugins/removeViewBox.js) | remove `viewBox` attribute when possible | `enabled` |
| [cleanupEnableBackground](https://github.com/svg/svgo/blob/master/plugins/cleanupEnableBackground.js) | remove or cleanup `enable-background` attribute when possible | `enabled` |
| [minifyStyles](https://github.com/svg/svgo/blob/master/plugins/minifyStyles.js) | minify `<style>` elements content with [CSSO](https://github.com/css/csso) | `enabled` |
| [convertStyleToAttrs](https://github.com/svg/svgo/blob/master/plugins/convertStyleToAttrs.js) | convert styles into attributes | `enabled` |
| [convertColors](https://github.com/svg/svgo/blob/master/plugins/convertColors.js) | convert colors (from `rgb()` to `#rrggbb`, from `#rrggbb` to `#rgb`) | `enabled` |
| [convertPathData](https://github.com/svg/svgo/blob/master/plugins/convertPathData.js) | convert Path data to relative or absolute (whichever is shorter), convert one segment to another, trim useless delimiters, smart rounding, and much more | `enabled` |
| [convertTransform](https://github.com/svg/svgo/blob/master/plugins/convertTransform.js) | collapse multiple transforms into one, convert matrices to the short aliases, and much more | `enabled` |
| [removeUnknownsAndDefaults](https://github.com/svg/svgo/blob/master/plugins/removeUnknownsAndDefaults.js) | remove unknown elements content and attributes, remove attrs with default values | `enabled` |
| [prefixIds](https://github.com/svg/svgo/blob/master/plugins/prefixIds.js) | prefix IDs and classes with the SVG filename or an arbitrary string | `disabled` |
| [cleanupIDs](https://github.com/svg/svgo/blob/master/plugins/cleanupIDs.js) | remove unused and minify used IDs | `enabled` |
| [cleanupNumericValues](https://github.com/svg/svgo/blob/master/plugins/cleanupNumericValues.js) | round numeric values to the fixed precision, remove default `px` units | `enabled` |
| [cleanupListOfValues](https://github.com/svg/svgo/blob/master/plugins/cleanupListOfValues.js) | round numeric values in attributes that take a list of numbers (like `viewBox` or `enable-background`) | `disabled` |
| [moveElemsAttrsToGroup](https://github.com/svg/svgo/blob/master/plugins/moveElemsAttrsToGroup.js) | move elements' attributes to their enclosing group | `enabled` |
| [moveGroupAttrsToElems](https://github.com/svg/svgo/blob/master/plugins/moveGroupAttrsToElems.js) | move some group attributes to the contained elements | `enabled` |
| [collapseGroups](https://github.com/svg/svgo/blob/master/plugins/collapseGroups.js) | collapse useless groups | `enabled` |
| [sortAttrs](https://github.com/svg/svgo/blob/master/plugins/sortAttrs.js) | sort element attributes for epic readability | `disabled` |
| [sortDefsChildren](https://github.com/svg/svgo/blob/master/plugins/sortDefsChildren.js) | sort children of `<defs>` in order to improve compression | `enabled` |
| [removeDimensions](https://github.com/svg/svgo/blob/master/plugins/removeDimensions.js) | remove `width`/`height` and add `viewBox` if it's missing (opposite to removeViewBox, disable it first) | `disabled` |
| [removeAttrs](https://github.com/svg/svgo/blob/master/plugins/removeAttrs.js) | remove attributes by pattern | `disabled` |
| [removeAttributesBySelector](https://github.com/svg/svgo/blob/master/plugins/removeAttributesBySelector.js) | removes attributes of elements that match a css selector | `disabled` |
| [removeElementsByAttr](https://github.com/svg/svgo/blob/master/plugins/removeElementsByAttr.js) | remove arbitrary elements by ID or className | `disabled` |
| [addAttributesToSVGElement](https://github.com/svg/svgo/blob/master/plugins/addAttributesToSVGElement.js) | adds attributes to an outer `<svg>` element | `disabled` |
| [removeOffCanvasPaths](https://github.com/svg/svgo/blob/master/plugins/removeOffCanvasPaths.js) | removes elements that are drawn outside of the viewbox | `disabled` |
| [removeStyleElement](https://github.com/svg/svgo/blob/master/plugins/removeStyleElement.js) | remove `<style>` elements | `disabled` |
| [removeScriptElement](https://github.com/svg/svgo/blob/master/plugins/removeScriptElement.js) | remove `<script>` elements | `disabled` |
| [reusePaths](https://github.com/svg/svgo/blob/master/plugins/reusePaths.js) | Find duplicated <path> elements and replace them with <use> links | `disabled` |
Want to know how it works and how to write your own plugin? [Of course you want to](https://github.com/svg/svgo/blob/master/docs/how-it-works/en.md). ([동작방법](https://github.com/svg/svgo/blob/master/docs/how-it-works/ko.md))
## Installation
```sh
$ [sudo] npm install -g svgo
```
## Usage
### <abbr title="Command Line Interface">CLI</abbr>
```
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
