JPG vs PNG vs WEBP: Which Image Format Should You Actually Use?

Every image format makes a different tradeoff between file size, quality, and features, and picking the wrong one is one of the more common (and easily fixed) sources of a slow website or a bloated email attachment. Here's what actually separates the three formats you'll run into most often.

JPG: the default for photos

JPG uses lossy compression, meaning it discards some image data to shrink file size, with a quality setting that controls how much. For photographs — where the human eye is forgiving of subtle compression artifacts — JPG usually hits the best size-to-quality balance of the three formats. What JPG can't do is transparency; every JPG has an opaque background, which rules it out for logos or graphics that need to sit cleanly over other content.

PNG: lossless, with transparency

PNG is lossless — nothing is discarded, so what you save is pixel-for-pixel identical to the source. That makes it the right choice for screenshots, logos, and graphics with sharp edges or text, where JPG's compression artifacts would visibly blur fine detail. PNG also supports a transparent background (an alpha channel), which is why it's the standard format for logos and icons meant to overlay other content. The tradeoff is file size: a PNG of a complex photo is typically much larger than an equivalent JPG.

WEBP: modern, and usually the smallest

WEBP is a newer format that supports both lossy and lossless compression, plus transparency, in one format — effectively covering what JPG and PNG each do separately, usually at a smaller file size than either for equivalent visual quality. The main reason it isn't universal yet is that some older software and a handful of platforms still don't fully support it, though browser and app support has become very broad.

A simple way to decide

Photos with no transparency need: JPG for maximum compatibility, or WEBP if the destination supports it and file size matters (like a website's load time). Logos, icons, and anything needing a transparent background: PNG for maximum compatibility, or WEBP again if supported. Screenshots and graphics with sharp text or lines: PNG, since JPG's compression tends to blur fine detail the most in exactly this kind of image.

If you're not sure which will actually end up smaller for a specific image, the fastest way to find out is to try both — Convert Image handles conversion between all three formats (plus several others) in seconds, and Compress Image lets you compare file sizes directly at different quality levels before you commit to one.