JPG vs PNG vs WebP: Which Image Format Should You Use?
There is no single best image format. The right choice depends on whether you need transparency, photographic compression, lossless storage, broad compatibility or smaller web delivery.
JPG / JPEG
Well suited to photographs and other continuous-tone images. It uses lossy compression and does not support alpha transparency.
PNG
Useful for transparency, screenshots, logos and graphics where lossless storage matters. File sizes can be larger for photographs.
WebP
Supports lossy and lossless compression and can also support transparency. It is widely supported in modern browsers.
Choose based on content
A photograph usually compresses efficiently as JPEG or lossy WebP. A logo with transparent edges may be better as PNG or transparent WebP. Screenshots containing small text can look poor if compressed too aggressively with a lossy format.
Do not convert just for the extension
Real conversion changes the encoded image data. Renaming a file from .jpg to .png does not convert it. Use a converter and then open the result to confirm that transparency, color and quality are still correct.
Keep an original master
Repeatedly saving a lossy image can accumulate visible artifacts. Keep a clean original and generate destination-specific exports from that master.
Convert an image format
Choose the output format based on your actual use case, then compare the result visually before publishing.