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JPG→WebP와 PNG→WebP 변환은 무엇이 다를까?
JPG와 PNG를 WebP로 바꿀 때 품질과 용량 결과가 왜 다른지 이해합니다.
JPG와 PNG를 같은 방식으로 WebP로 변환해도 결과는 다르게 나옵니다. 원본 형식이 결과를 크게 좌우하기 때문입니다.
JPG and PNG start from different data
JPG is already lossy, so converting it to WebP usually gives incremental savings rather than dramatic quality improvements.
PNG is often lossless or transparency-heavy, so converting to WebP can reduce size a lot, but settings must be chosen carefully.
What to expect from JPG to WebP
For photo content, WebP often cuts size further while keeping acceptable quality.
If the original JPG is already heavily compressed, pushing quality too low can quickly look worse.
What to expect from PNG to WebP
UI graphics and transparent assets can shrink significantly with WebP.
But text edges and logos need closer review, especially with lossy settings.
- Keep transparency checks in your QA step.
- Use higher quality for text-heavy graphics.
- Use lossless mode for critical brand assets.
Build two simple conversion rules
Use one default for photos (usually lossy) and another for graphics/transparency (often lossless or higher quality).
This keeps automation simple and avoids quality surprises.
Useful when
- Planning bulk conversion jobs.
- Comparing before/after image weight.
- Choosing export rules by asset type.
Start from the source format
If you separate JPG and PNG workflows, your WebP results become more predictable and easier to control.