Image formats are designed for different kinds of content. Choosing the correct format can reduce download time without making the picture look damaged.
Use JPG for photographs
JPG is efficient for portraits, product photos and scenes with many colours. It uses lossy compression, so quality settings matter. A well-compressed JPG can look excellent while staying much smaller than a PNG version of the same photograph.
Use PNG for transparency and sharp graphics
PNG is lossless and supports transparent backgrounds. It is a strong choice for logos, screenshots, diagrams and interface elements. A photo converted from JPG to PNG normally becomes larger because PNG preserves pixel data instead of applying photographic compression.
Use WebP for modern websites
WebP can store photographs and transparent graphics efficiently. It is widely supported by current browsers and is often the best delivery format for website images.
Quality still needs review
No format is automatically perfect. Compare the result at normal size and at 100 percent zoom. Look for halos around text, colour banding and blocky details in hair, fabric or backgrounds.
A simple decision guide
Choose JPG for compatible photographic files, PNG for transparency or crisp graphics, and WebP when efficient web delivery is the priority. Do not expect every format conversion to reduce size: the content and compression method decide the result.