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

Most people pick an image format by accident, whatever the "Save As" menu defaulted to. That's usually fine, right up until a logo shows up with an ugly white box behind it, or a photo page takes six seconds to load. The four formats below cover essentially everything you'll deal with in 2026, and choosing well comes down to two questions: do you need transparency, and is it a photo or a graphic?

The four formats at a glance

Lossy vs lossless, in one minute

Lossy compression (JPG, and the lossy modes of WebP/AVIF) throws away detail your eye is unlikely to miss, which makes files dramatically smaller. The catch is that it's permanent, and it struggles with hard edges, text and line art pick up a faint halo of "mosquito noise." Lossless compression (PNG, and the lossless modes of WebP/AVIF) keeps every pixel exactly as it was, which is essential for screenshots, logos, and anything with crisp edges, at the cost of larger files for photographic content.

When to use each

Reach for JPG when…

It's a photograph with no transparency and you want a small file that opens everywhere, a camera photo, a banner image, an email attachment. JPG has been universally supported for decades and is still the pragmatic default for photographic content outside the web.

Reach for PNG when…

You need transparency, or the image has sharp edges and text, logos, icons, UI screenshots, and any shaped crop (a circle, a heart, a hexagon) where the corners must be see-through. This is why every tool on ImageFixr exports PNG: a JPG literally cannot store a transparent background, so a "circle" saved as JPG comes back as a square with white corners.

Reach for WebP or AVIF when…

You're publishing to the web and page weight matters. Both are supported across every current browser and shrink files well below JPG/PNG at the same visible quality, WebP is the safe, fast all-rounder, while AVIF squeezes even harder (often half the size) at the cost of slower encoding. For a content site or store, serving WebP/AVIF is one of the easiest wins for load speed and Core Web Vitals.

The transparency trap (and how to get out of it)

The single most common format mistake is wanting a transparent image but saving as JPG. If you've removed a background or cropped to a shape and the result keeps coming back with a white box, the file is almost certainly a JPG. Re-export it as PNG (or WebP) and the transparency returns. If you need to remove a background or crop to a circle in the first place, both tools hand you a ready-to-use transparent PNG without uploading your image anywhere.

The short version

• • Photo, no transparency, anywhere: JPG.
• • Transparency, logos, screenshots, shaped crops: PNG.
• • Web pages where speed matters: WebP (or AVIF for maximum savings).