Round/rewrite number lists (cleanupListOfValues)
Rounds numbers inside space-separated lists (points, viewBox, transforms) for smaller attributes.
What Round/rewrite number lists does in SVGO
SVGO applies cleanupListOfValues as part of its plugin pipeline. In SVGOMG the toggle is labeled Round/rewrite number lists (off 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
Polygons and polylines with over-precise point lists.
When to disable
When list values must stay at full precision for hit-testing or animation.
Watch out for
Off by default; enable with care on data visualizations.
Try it in SVGOMG
- Open svgomg.net and load your SVG (file, paste, or demo).
- Find Round/rewrite number lists in the Features panel (
cleanupListOfValues). - 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.