GUIDE深度 · Deep dive
JPG, PNG or WebP?
Photos: JPG (small, compatible). Screenshots/text/transparency: PNG. For the web, prefer WebP (smaller, supports transparency). Fall back to JPG/PNG for old software or print. Avoid repeated transcoding, which loses quality each time, and compare the output size and sharpness before publishing.
Photos: JPG/WebP.
Screenshots/text: PNG/WebP.
Transparency: PNG/WebP.
Animation: GIF/WebP/video.
Old systems/Office may not read WebP.
Print/submission often wants JPG/PNG/TIFF.
FAQ
Is WebP always smaller?
Usually, but not always at low quality/odd images; compare size and quality.
Does PNG get larger?
Photos often get larger as PNG; it suits screenshots/text.