SVG Optimization and Data URI Workflow 日本語ガイド

Inline SVG icons and tiny UI assets often ship with extra whitespace, editor metadata, or risky markup. You can optimize SVG as text in the browser and copy Data URI snippets without uploading files.

When to optimize SVG

Optimize when you need:

• Smaller sprite or icon files before commit
• A data:image/svg+xml URI for CSS background-image
• A cleaned SVG snippet for documentation or component examples

Skip optimization when you still need human-friendly formatting for manual editing—use Safe mode first.

Local workflow

1. Copy SVG from your design export, component, or sprite sheet.
2. Open SVG Optimizer.
3. Paste markup or upload a .svg file.
4. Review the security pre-check for <script>, event attributes, or external URLs.
5. Run Safe optimization by default.
6. Copy optimized SVG, URL-encoded Data URI, or CSS background-image snippet.

Safe vs Aggressive

• Safe keeps viewBox, title, desc, role, and aria-* when possible.
• Aggressive minifies harder and may remove accessibility-friendly metadata.

Security note

Treat pasted SVG like code, not like harmless text. This tool does not render SVG in the page, but you should still review high-risk patterns before using output in production.

Related tools

• Base64 — inspect or convert other encoded payloads.
• CSS Unit Converter — pair Data URI backgrounds with layout math.
• Image Compressor — bitmap compression when SVG is not the right format.