Currently scour automatically performs the following operations on input SVG files:

• Removes unreferenced elements in a <defs>
• Removes all inkscape, sodipodi, adobe elements
• Removes all inkscape, sodipodi, adobe attributes
• Remove all unused namespace declarations on the document element
• Removes any empty <defs>, <metadata>, or <g> elements
• Style fix-ups:
  • Fixes any style properties like this: style="fill: url(#linearGradient1000) rgb(0, 0, 0);"
  • Removes any style property of: opacity: 1;
  • Removes any stroke properties when stroke=none or stroke-opacity=0 or stroke-width=0
  • Removes any fill properties when fill=none or fill-opacity=0
  • Removes all fill/stroke properties when opacity=0
  • Removes any text/font properties on shape elements
  • Removes Inkscape-specific properties: -inkscape-font-specification
  • Removes any stroke: none
  • Removes any stop-opacity: 1
  • Removes any fill-opacity: 1
  • Removes any stroke-opacity: 1
  • Remove any display:none
  • Remove any visibility:visible
  • Remove any overflow:visible
  • Remove any marker:none
• Convert style properties into SVG attributes
• Prevent error when stroke-width property value has a unit
• Convert width/height into a viewBox where possible
• Convert all referenced rasters into base64 encoded URLs if the files can be found
• prevent metadata from being removed if they contain only text nodes
• Remove unreferenced pattern and gradient elements outside of defs
• Removal of extra whitespace, pretty printing of XML
• Remove unnecessary nested <g> elements (as long as they have no attributes or title/desc children)
• Remove duplicate gradient stops (same offset, stop-color, stop-opacity)
• Convert gradient stop offsets into float/int
• Always keep fonts inside <defs>, always keep ids on fonts
• Collapse any gradient that is only referenced by one other gradient
• Convert all colors to #RRGGBB format
• Reduce Path Data:
  • Remove unnecessary whitespace between commands, negative coordinate
  • Limit to 5 digits of precision, this can be modified with the --set-precision argument
  • Converts absolute to relative path commands
  • Remove empty line and curve segments
  • Convert lines to horiz/vertical line segments where possible
  • Convert curvest to shorthand equivalents where possible
  • Collapse consecutive h,v segments/coordinates where possible
  • Collapse adjacent commands of the same type
  • Convert straight curves into line commands
  • Remove trailing zeros after decimals
  • Use scientific notation if that representation is shorter
• Remove last coordinate from polygon if possible
• Reduce polygon points data as per path data reduction
• Reduce polyline points data as per path data reduction
• Scour length/coordinate attributes (integerize, remove trailing zeros, etc)
• Remove redundant SVG namespace declarations and prefixes
• Move common attributes to ancestor elements