Prefer viewBox to width/height (`removeDimensions`)

Removes width/height when viewBox is present so CSS controls sizing.

What Prefer viewBox to width/height does in SVGO

SVGO applies removeDimensions as part of its plugin pipeline. On SVGOMG.net the toggle is labeled Prefer viewBox to width/height (off by default). Optimization runs entirely in your browser — files are not uploaded to a server.

Use SVGOMG.net with Show original to compare before and after. If output looks wrong, disable this plugin first, then re-enable related transforms one at a time.

When to enable

Responsive icons and illustrations scaled with CSS.

When to disable

Assets that need explicit pixel dimensions without CSS.

Watch out for

Pair with a valid viewBox; otherwise intrinsic size may collapse.

Try it

Open SVGOMG.net and load your SVG (file, paste, or demo).
Find Prefer viewBox to width/height in the Features panel (removeDimensions).
Toggle the plugin and compare the preview; download when satisfied.

Part of: Responsive SVG sizing

This plugin is covered in the Responsive SVG sizing topic guide along with related transforms.

SVGO Plugin Guide

Browse the SVGO Plugin Guide or read the full SVG optimization walkthrough.