JPG vs PNG vs WebP vs AVIF: Which Image Format Should You Use?

Every image you save ends up in one of these four formats, and most people never think about which one until a logo looks blurry, a photo won't upload, or a website feels slower than it should. The difference isn't cosmetic - it comes down to two things: whether the format throws away detail to save space, and whether it can handle a transparent background at all.

Lossy vs lossless: the difference that actually matters

JPG, WebP, and AVIF are lossy formats by default, meaning they compress an image by discarding detail the eye is less likely to notice - similar to how MP3 handles audio. The more you compress, the smaller the file, and the more detail quietly disappears, especially around sharp edges and text. PNG is lossless: nothing is thrown away, every pixel comes back exactly as it went in. That precision comes at a cost - a lossless PNG of a detailed photo is often several times larger than the same image saved as JPG. This one distinction explains almost every other difference between these formats: JPG, WebP, and AVIF are built for photos where a little lost detail isn't visible; PNG is built for anything where exactness matters more than file size.

Transparency: PNG, WebP, and AVIF support it, JPG doesn't

If you need a see-through background - a logo that sits on any color, an icon dropped onto a photo, a graphic layered over another image - JPG is out. It has no concept of transparency; every JPG is a solid rectangle, no exceptions. PNG, WebP, and AVIF all support a transparent channel, so the background can be genuinely absent rather than filled in with white or black. This is why logos and icons almost always ship as PNG: it's the lossless, transparency-capable format that's supported everywhere, no compatibility questions asked.

Matching the format to what you're actually making

Photography is JPG's home turf. A photo has continuous tones and countless subtle gradients, exactly the kind of image where lossy compression is nearly invisible and the file-size savings are dramatic - a JPG can be a tenth the size of the same photo as PNG with no visible difference at normal viewing sizes.

Logos, screenshots, and anything with flat colors or text belong in PNG. Lossy compression is rough on sharp edges and solid color blocks - text can blur, clean lines can pick up fuzzy artifacts around the edges. PNG's lossless nature keeps a screenshot's text crisp and a logo's edges clean, and its transparency support means the logo can go on white, black, or a photo behind it.

WebP is the general-purpose pick for anything going on a website. It was built specifically to beat JPG and PNG at their own games - noticeably smaller than JPG at equivalent visual quality for photos, and it supports transparency like PNG, so it can often replace both. Nearly every modern browser supports it now, which is why so many websites default to it for faster page loads.

AVIF is the newest of the four and compresses even more efficiently than WebP - smaller files at the same visual quality, sometimes dramatically so. The catch is support: while current versions of most major browsers handle AVIF fine, some older browsers, a chunk of image-editing software, and plenty of apps that read image files directly still don't. It's the right choice when you control the destination and know AVIF will be accepted; it's a riskier default when you don't.

A decision path by use case

If you're not sure which to reach for, work backward from where the image is going: • Uploading to social media: JPG for photos, PNG if it needs a transparent background or has text and flat graphics • Sending by email: JPG for photos to keep attachments small; PNG only if transparency matters, since it'll be a bigger attachment • Printing: PNG or the highest-quality JPG available - lossy compression artifacts that are invisible on a screen can show up on paper, so avoid anything heavily compressed • Building a website: WebP for the best balance of quality and speed on modern browsers, with AVIF as a further upgrade if your platform and audience support it, and JPG or PNG as the universally safe fallback

Converting between formats

You don't need design software installed to move between these. Our image converter handles JPG, PNG, WebP, and AVIF conversions directly in the browser - upload the file, pick the format you actually need, and download the result. It's the fastest way to fix a wrong-format problem: a PNG that's too big for an upload limit, a WebP a client's software won't open, or a JPG that needs a transparent background pulled out of it first.

When the format isn't really the problem

Sometimes what looks like a format issue is actually a background issue - you don't need a different file type, you need the background gone entirely. If you're prepping a product photo or a headshot for a transparent PNG, our background remover strips the background automatically in a few seconds, no format juggling required. Pair that with a quick conversion to whichever format your destination actually wants, and most everyday image problems are solved in under a minute, without ever opening an editor.