Round/rewrite numbers (cleanupNumericValues)
Rounds numeric attributes (coordinates, opacities) to fewer decimal places.
What Round/rewrite numbers does in SVGO
SVGO applies cleanupNumericValues as part of its plugin pipeline. In SVGOMG the toggle is labeled Round/rewrite numbers (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
Most web SVGs; tune global number precision in SVGOMG.
When to disable
Scientific plots or maps needing many decimal places.
Watch out for
Works with convertPathData; combined rounding can compound.
Try it in SVGOMG
- Open svgomg.net and load your SVG (file, paste, or demo).
- Find Round/rewrite numbers in the Features panel (
cleanupNumericValues). - 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.