WebP vs AVIF vs JPG — which format should you use?

Start with the job, not the acronym

Sending vacation photos to a parent who opens mail on an old tablet? Stick with JPG. Government forms, bank uploads, and print shops that only accept JPEG still expect it — compatibility is rarely a gamble worth taking.

Running your own site, blog, or product catalog where visitors use current browsers? WebP often cuts file size noticeably while looking close to JPG, and unlike JPEG it can carry transparency.

Chasing every kilobyte on a high-traffic page and you can serve multiple sources with a `<picture>` element? Then AVIF is worth testing — but never ship AVIF alone without a JPG or WebP backup for clients that cannot decode it.

JPG: the photo format everyone still speaks

JPEG is lossy compression tuned for photographs — portraits, landscapes, event shots. Phones, laptops, CMS dashboards, and social apps all open it without drama.

It is a poor fit for transparent backgrounds, flat-color logos, or UI screenshots where text must stay razor-sharp. Those belong in PNG or WebP instead.

Each "Save as JPG" pass stacks another generation of loss. Export once from the cleanest source you have rather than bouncing between formats repeatedly.

WebP: the modern web workhorse

For similar visual quality on photos, WebP usually beats JPG on bytes — sometimes by a wide margin. It also supports alpha channels, which JPEG simply cannot do.

Static hosts, CDNs, and most site frameworks already know how to serve WebP. Email clients are the messy exception: many still render attached images as plain JPEG, so inline newsletter graphics often stay JPG.

When a PNG screenshot feels bloated, converting to WebP usually shrinks it more than re-saving as PNG. That is why our Compress PNG flow defaults to WebP output.

AVIF: smaller files, more moving parts

On busy photographic scenes, AVIF frequently beats WebP again — at the cost of slower encoding and occasional gaps on older devices or embedded WebViews inside apps.

Production setups typically offer AVIF as the preferred source inside `<picture>`, with WebP or JPG as fallbacks so the browser picks the best format it understands.

If your build pipeline already struggles with AVIF encode times, or your team has not wired up fallbacks yet, getting WebP right first often delivers most of the win with less friction.

Cheat sheet (rules of thumb)

Must work on any device you cannot control → JPG.

Modern site hero or listing images with a fallback path → WebP, or AVIF plus WebP/JPG backup.

Transparency on the web → WebP or PNG; PNG when you need the widest legacy tolerance for alpha.

Images inside email body copy → still lean JPG in most cases.

On the fence → export WebP and JPG side by side, open Image compressor, and compare size against what your eyes accept.

Format is half the story — size and quality matter too

A 4000 px-wide photo saved as WebP is still heavy if you never resized it. Downscale to the display width first, then pick the format.

After format and dimensions look right, a compression pass can trim the last few percent. Keep the original master when working with lossy output so you are not stacking generations.