Remove unused namespaces (removeUnusedNS)
Removes xmlns declarations that are not referenced anywhere in the document.
What Remove unused namespaces does in SVGO
SVGO applies removeUnusedNS as part of its plugin pipeline. In SVGOMG the toggle is labeled Remove unused namespaces (enabled by default). Optimization runs entirely in your browser — files are not uploaded to a server.
Use the SVGOMG optimizer 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
SVGs with unused namespace declarations from merged files.
When to disable
Documents that will receive injected namespaced content later.
Watch out for
None for single-namespace icons.
Try it in SVGOMG
- Open svgomg.net and load your SVG (file, paste, or demo).
- Find Remove unused namespaces in the Features panel (
removeUnusedNS). - Toggle the plugin and compare the preview; download when satisfied.
SVGO Plugin Guide
Browse the SVGO Plugin Guide or read the full SVG optimization walkthrough on the homepage.