How to Optimize SVG Files with SVGO Online

Why SVG Optimization Matters

SVG files exported from design tools like Figma, Illustrator, or Sketch carry a lot of baggage. Editor metadata, redundant attributes, unused definitions, verbose path data, and XML comments inflate file sizes without adding any visual value.

A typical icon exported from Figma might be 3-5KB. After optimization, that same icon often drops to 1-2KB — a 40-60% reduction. Across a site with dozens of inline SVG icons, this adds up meaningfully for page load performance.

Common sources of SVG bloat:

• Editor metadata — Tool-specific data attributes and namespaces
• Redundant attributes — Default values that browsers apply automatically
• Unused definitions — Gradients, filters, or clip paths that aren't referenced
• Verbose path data — Coordinates with unnecessary precision (8+ decimal places)
• Empty groups — <g> elements that contain nothing or serve no purpose
• XML comments — Notes from the design tool's export process

Using Our Online SVG Optimizer

Our SVG Optimizer uses SVGO (SVG Optimizer), the industry-standard open-source library, to clean up your SVG files. The tool runs SVGO server-side for accurate results, but your SVG is only used for processing — it's never stored.

Quick Start

1. Load your SVG — Paste code, drag and drop a file, or upload
2. Click Optimize — The optimized output appears immediately
3. Review the result — Compare original and optimized sizes
4. Copy or download — Get the clean SVG for your project

Understanding the Options

The optimizer provides granular control over what gets cleaned up:

Cleanup IDs — Minifies or removes unused id attributes. Design tools often generate verbose IDs like _x33_Layer_2_1_. This option shortens them to a, b, c or removes them entirely if unused. (Recommended: On)

Convert colors — Shortens color values where possible. #ff0000 becomes red, rgb(0,0,0) becomes #000. This saves a few bytes per color value. (Recommended: On)

Merge paths — Combines adjacent <path> elements into a single path when they share the same attributes. Reduces element count and saves bytes. (Recommended: On)

Convert path data — Optimizes the d attribute of path elements by simplifying commands and reducing coordinate precision. This is usually the biggest size win. (Recommended: On)

Remove title — Strips <title> elements. These are used for accessibility, so keep them if your SVGs need screen reader support. (Recommended: Off for accessible icons, On for decorative icons)

Remove desc — Strips <desc> elements. Similar to title — keep for accessible SVGs. (Recommended: Off for accessible icons, On for decorative icons)

Remove viewBox — Removes the viewBox attribute. Warning: This usually breaks responsive scaling. Only use if your SVGs have explicit width/height and will never be resized. (Recommended: Off)

Multipass — Runs the optimization multiple times. Some optimizations unlock further optimizations on subsequent passes. Produces the smallest output at the cost of slightly longer processing. (Recommended: On)

Reading the Size Comparison

After optimization, you'll see:

• Original size — The byte count of your input SVG
• Optimized size — The byte count after optimization
• Percentage saved — The reduction ratio

For example: 2.4 KB → 1.1 KB (54% saved) means the optimizer removed more than half the file size while preserving the visual output.

What SVGO Does NOT Change

SVGO only removes what's provably unnecessary. It does not:

• Change the visual appearance of your SVG
• Remove paths or shapes that are visible
• Alter colors (except notation, e.g., #ff0000 → red)
• Modify the viewBox coordinate system (unless explicitly enabled)
• Remove accessibility attributes like aria-label or role

If you want to verify, paste the optimized SVG into our SVG Viewer and compare it visually with the original.

Optimization Best Practices

Optimize Before Committing to Git

SVG files in source control benefit from optimization. Smaller files mean smaller diffs, faster clones, and less storage. Consider optimizing SVGs as part of your development workflow.

Optimize Before Converting to PNG

If you're using our SVG to PNG Converter, optimizing first ensures the cleanest possible rendering. While the visual output is identical, a cleaner SVG source means fewer rendering artifacts at edge cases.

Don't Remove viewBox

The viewBox attribute is essential for responsive SVGs. Without it, SVGs may not scale correctly when their container size changes. Keep this option off unless you have a specific reason to remove it.

Keep Accessibility Attributes When Needed

If your SVGs serve as informative icons (not purely decorative), keep <title> and <desc> elements. These provide context for screen readers. For decorative icons that have adjacent text labels, it's safe to remove them.

Common Results by Source

Icon libraries like Lucide and Heroicons already run SVGO as part of their build process, so there's little to gain from re-optimizing them.

Related Tools

• SVG Viewer — Preview and inspect your SVGs before and after optimization
• SVG to PNG Converter — Convert optimized SVGs to PNG at any size with batch export
• AI Icon Generator — Generate fresh SVG icons from text descriptions — output is already optimized