How to Optimize SVG for Web
Unoptimized SVG files exported from Adobe Illustrator or Inkscape contain editor metadata, redundant attributes, and bloated path data that increase file size without improving visual quality. Optimizing removes these to produce a leaner, faster-loading SVG.
About How to optimize SVG for web
SVG files exported from design tools contain significant overhead: embedded editor namespaces, unused definitions, redundant style attributes, descriptive comments, and editor-specific metadata. SVGO (SVG Optimizer) is the standard tool for removing this overhead automatically.
Method 1 — SVG Cleanup tool: upload your SVG to the SVG Cleanup tool. The tool applies SVGO-based optimization to remove metadata, collapse groups, clean style attributes, and reduce path data precision. This is the fastest production-ready optimization method.
Method 2 — SVGO via command line: install SVGO (npm install -g svgo) and run svgo input.svg -o output.svg. Use the default configuration for standard optimization, or configure specific plugins to target exact optimizations.
Key SVGO plugins and what they do: removeMetadata (removes editor info), cleanupIds (shortens and deduplicates IDs), mergePaths (combines compatible paths into single elements), convertShapeToPath (converts rect/circle/polygon to path for consistency), convertTransform (flattens transform attributes into path coordinates).
SVG optimization for inline SVG: when embedding SVG directly in HTML, remove all unnecessary attributes and use CSS classes instead of inline style attributes. This dramatically reduces HTML payload and allows browser caching of SVG styles via CSS.
For SVG icons used at small sizes: round path coordinates to 1–2 decimal places (SVGO's convertPathData plugin). Coordinate precision beyond 2 decimal places is invisible at icon scales and adds unnecessary file size.