ガイド
実務で使えるWebP品質設定の目安
写真・記事画像・UI素材に合わせた実用的なWebP品質レンジを紹介します。
WebPの最適値は1つではなく、画像の種類と用途で変わります。少数のレンジで比較すると判断が速くなります。
Start with practical quality ranges
For many photo-style web images, quality around 70–82 is a strong starting point. For UI screenshots or text-heavy images, test higher quality first to protect sharp edges.
If quality is too low, artifacts become obvious around text, gradients, and faces.
Choose by image type
Photos usually handle lossy compression well, but graphics with text and flat colors may need higher quality or lossless mode.
Treat product photos, UI captures, and logos as separate cases instead of using one global export preset.
Compare size and clarity side by side
Run two or three exports, then compare actual file size and visible quality at real display size.
Tiny quality gains are not worth large file size increases.
- Test around 65, 75, and 85 for photos.
- Zoom to 100% when checking edges and text.
- Prefer the smallest version that still looks clean.
Save your default workflow
Once you find ranges that work, document them for your team.
A simple rule set prevents random quality choices and keeps image output consistent.
Where this helps most
- Optimizing blog post images.
- Reducing hero image weight.
- Exporting UI screenshots.
- Building a repeatable team workflow.
Use ranges, then verify
Start with a practical range, check visual quality, and keep the smallest acceptable file.