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

TL;DR — the short version

Use JPG for photos when broad compatibility matters. Use PNG for screenshots, logos, and anything needing transparency. Use WebP for most modern website images. Use AVIF when you want the smallest modern files and can accept slightly more workflow friction.

What each image format is actually good at

JPG

JPG is still the safest default for photos. It is widely supported, lightweight enough for sharing, and easy to work with across devices, apps, and legacy workflows. If you're emailing images or uploading to general-purpose platforms, JPG almost never surprises you.

PNG

PNG is the right answer when sharp edges and transparency matter — screenshots, UI mockups, diagrams, logos, and product cutouts. It is usually heavier than JPG for photos, but cleaner for graphics and interface captures.

WebP

WebP is often the most practical modern web format. It usually compresses better than JPG and PNG while keeping good quality. For websites, product listings, and blog assets, WebP is usually the best middle ground between compatibility and performance.

AVIF

AVIF pushes file size even lower than WebP in many cases. It's strong when you're aggressively optimizing website performance, but it can be a little less convenient in mixed workflows because some tools and older platforms still lag behind.

JPG vs PNG vs WebP vs AVIF comparison

Best image format for websites

If the goal is website speed, start by asking whether the image is a photo or a graphic. For photos, test WebP first. For graphics with transparency, compare PNG vs WebP. If you're chasing every last KB and your audience is mostly on modern browsers, test AVIF too.

A practical workflow is: choose the format here, then use Image Convert to switch formats and Image Compress to push file size down further.

Best image format for social media and marketplaces

For social posts, client handoff, and marketplace uploads, compatibility still wins a lot of the time. JPG is often the safest delivery format unless the platform explicitly supports and benefits from WebP. If you are working with product cutouts or logos, PNG may still be the better working asset before conversion.

WebP vs AVIF for websites

If you already know you're choosing between WebP and AVIF, the short answer is this: WebP is the easier default, AVIF is the more aggressive optimization play. WebP usually fits more workflows cleanly. AVIF is worth testing on the pages where Core Web Vitals and image-heavy layouts matter the most.

We broke that narrower question out more directly in our WebP vs AVIF guide for websites.

When to use each ToolBox image tool

Use Image Format when you need a quick chooser plus lightweight helper. Use Image Convert when you already know the target format. Use Image Compress when the format is okay but the file is too heavy. For the bigger picture, jump back to the Image Tools hub.

Frequently asked questions