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. On SVGOMG.net the toggle is labeled Remove unused namespaces (enabled 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

SVGs with unused namespace declarations from merged files.

When to disable

Documents that will receive injected namespaced content later.

Try it

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.

Part of: Attributes and namespaces

This plugin is covered in the Attributes and namespaces topic guide along with related transforms.

SVGO Plugin Guide

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