# svgo > SVG Optimizer: optimizing Scalable Vector Graphics files. Based in Node.js. > It applies a series of transformation rules (plugins), which can be toggled individually. > More information: . - Optimize a file using the default plugins (overwrites the original file): `svgo {{test.svg}}` - Optimize a file and save the result to another file: `svgo {{test.svg}} {{[-o|--output]}} {{test.min.svg}}` - Optimize all SVG files within a directory (overwrites the original files): `svgo {{[-f|--folder]}} {{path/to/directory/with/svg/files}}` - Optimize all SVG files within a directory and save the resulting files to another directory: `svgo {{[-f|--folder]}} {{path/to/input/directory}} {{[-o|--output]}} {{path/to/output/directory}}` - Optimize SVG content passed from another command, and save the result to a file: `{{cat test.svg}} | svgo {{[-i|--input]}} - {{[-o|--output]}} {{test.min.svg}}` - Optimize a file and print out the result: `svgo {{test.svg}} {{[-o|--output]}} -` - Show available plugins: `svgo --show-plugins`