ナレッジハブ・技術ガイド
SVGベクターデータ最適化・ファイル軽量化
SVGベクターデータ最適化・ファイル軽量化
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コアアーキテクチャ & 計算式
Optimized SVG = Remove(Metadata) ➔ Minify(Whitespace) ➔ Round(Path Coordinates)
The single biggest byte saving in SVG optimization is rounding floating point coordinates. A coordinate like `M 10.4857239 20.1239578` can be rounded to `M 10.5 20.1` without visibly changing the shape on screen.
ベストプラクティスとガイドライン
- Remove Invisible Elements: Designers often hide layers (e.g., `display: none`) rather than deleting them before exporting. The SVG optimizer strips these hidden layers, instantly reducing file bloat.
- Minify Path Data: A complex vector icon can have hundreds of path nodes. Stripping unnecessary spaces and commas from the `d=` attribute drastically reduces the final HTML DOM size.
- Use SVG Sprites for Icons: If you use the same SVG icon multiple times on a page, do not inline it 10 times. Optimize it once, place it in an SVG `<symbol>`, and reference it via `<use>` to save massive bandwidth.
よくある質問 (FAQ)
Will optimization change how my SVG looks?
Generally, no. However, if you set the 'Coordinate Precision' too low (e.g., rounding to 0 decimal places) on a very tiny icon, the paths might snap to grid points, causing the icon to look jagged or distorted.
Does this tool remove the viewBox attribute?
No. Removing the `viewBox` breaks the SVG's ability to scale responsively across different screen sizes. The optimizer strictly preserves critical scaling attributes.
Why is my SVG still so large?
If your SVG contains an embedded raster image (a `<image href='data:image/jpeg...'>` tag), it defeats the purpose of using vector graphics. You must trace the image into vector paths in your design software first.