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WebP vs PNG vs JPG: which image format , and when

JPG, PNG, and WebP aren't interchangeable — each was built for a different job, and years apart. WebP is the newest and usually the smallest, but "smallest" isn't always "right." Here's what separates them, and a simple rule for picking the correct one every time.

Last updated 2026-07-12

Three formats built for three different jobs

JPG, PNG, and WebP all store images, but each was designed to solve a different problem — and reaching for the wrong one either wastes bandwidth or throws away quality you can't get back. JPG (standardized in 1992) was built to compress photographs. PNG (1996) was built for sharp-edged graphics and transparency. WebP, released by Google in September 2010, came last and set out to do both jobs in a single, smaller file.

None of them is simply "best." The right choice comes down to three questions: is the image a photo or a graphic, does it need a transparent background, and where does it have to open? Answer those and the format usually picks itself — the rest of this guide is really just those three questions applied to each format's strengths.

JPG: the universal photo format

JPG (also written JPEG) uses lossy compression: it permanently discards image detail your eye is unlikely to notice in exchange for dramatically smaller files. That trade-off is ideal for photographs — skies, skin, and smooth gradients of colour — where a little lost precision is invisible. It's a poor fit for anything with hard edges or text: push the compression on a screenshot or a logo and you'll see blocky "halo" artifacts smeared around the lines.

JPG also cannot store transparency at all — no alpha channel, no transparent background, ever. Its one unbeatable advantage is reach. Every camera, browser, printer, upload form, and decades-old piece of software reads JPG without complaint, which is exactly why it's still the safe default when a photo has to open literally anywhere.

PNG: lossless, transparent, and heavy

PNG is JPG's opposite. It's lossless — it reconstructs every pixel exactly, so an image never degrades no matter how many times you re-save it — and it carries a full alpha channel, giving you up to 256 levels of transparency for clean edges against any background. That makes PNG the right format for logos, icons, screenshots, diagrams, and anything built from sharp text or flat colour.

The cost is size. A photograph saved as PNG can be five to ten times larger than the same photo as a JPG, because lossless compression can't throw away the fine, noisy detail that makes photographs heavy in the first place. Use PNG when you genuinely need transparency or pixel-perfect edges — not as a container for photos headed to the web.

WebP: smaller files, both modes, one catch

WebP is the modern attempt to get the best of both. It has a lossy mode that competes with JPG and a lossless mode that competes with PNG, and it supports transparency and animation in either. The payoff is size: Google's own tests put lossless WebP around 26% smaller than PNG, and lossy WebP 25-34% smaller than a JPG of equivalent quality. So one WebP file can stand in for your JPG photo or your transparent PNG logo while downloading noticeably faster.

The catch is acceptance. As of 2026 roughly 97% of browsers display WebP — every current version of Chrome, Firefox, Edge, Opera, and Safari (which added it in version 14, back in 2020) — so on the open web it's effectively universal. But "browsers show it" isn't "everything accepts it." Plenty of upload forms, print services, and older desktop apps still reject WebP outright. It also has real ceilings: WebP stores only 8 bits per colour channel — so no HDR or high-bit-depth work — and caps out at 16,383 pixels on a side, which a large panorama or poster scan can exceed.

What about AVIF and the newer formats?

You may have heard that AVIF, and increasingly JPEG XL, beat WebP on compression — and at matched quality they often do, with AVIF frequently 20-40% smaller again. The trade-off is the same one WebP faces, only sharper: AVIF has slightly narrower browser support (around 95% in 2026), encodes much more slowly, and is accepted by even fewer forms and desktop tools.

For a site you fully control and can serve with fallbacks, AVIF is worth testing. But for everyday use — where you want one file that is both small and that most software will actually open — WebP remains the pragmatic middle ground. That's why the rest of this guide sticks with it.

The decision rule

For a photograph on your own website, use WebP for the smaller file, and keep a JPG copy only if you still have to support genuinely ancient browsers. For a logo, icon, screenshot, or anything with a transparent background, use PNG for maximum compatibility — or lossless WebP if you control where it's displayed and want it lighter.

When you're handing the file to someone else — a print shop, a job-application portal, a form that says "JPG or PNG only" — pick JPG for photos and PNG for graphics. Universal support beats a smaller file you can't upload. And on the occasions a site simply won't take a WebP, converting it back to JPG or PNG takes seconds.

Converting without handing over your files

Converting between these formats usually means uploading your image to some website's server — which, for anything private like an ID scan, a client's artwork, or an unpublished photo, means trusting a stranger with a copy of it. GotConvert works differently: the image is decoded and re-encoded by your own device using JavaScript and WebAssembly, and the file never leaves your computer.

Whether you're shrinking a JPG to WebP, converting a JPG to PNG for an editor that insists on one, or turning a WebP a form rejected back into a JPG or PNG, every step runs locally in your browser. Nothing is uploaded, stored, or seen by us — you just download the converted file.

Convert a JPG to WebP

Frequently asked

Is WebP better than JPG and PNG?

For images on a website you control, usually yes — at matched quality WebP runs about 25-34% smaller than JPG and roughly 26% smaller than PNG, and it handles both photos and transparency. But "better" depends on where the file ends up. JPG and PNG still win whenever universal acceptance matters more than file size, such as print, upload forms, or older software.

Does every website and app accept WebP in 2026?

Roughly 97% of browsers display WebP, so on the web it's effectively universal. Acceptance by software is a separate question: many upload forms, print services (Shutterfly and Vistaprint among them), and legacy desktop apps still refuse WebP and want JPG, PNG, or TIFF. When that happens, convert your WebP back to JPG or PNG first.

Does WebP support transparency like PNG?

Yes. WebP carries a full alpha channel in both its lossy and lossless modes, so it handles transparent backgrounds just like PNG — and it also does animation, which plain PNG can't. Animated PNG is a separate extension (APNG) that browsers now support but many image editors still don't write. If you need transparency in a smaller file and control where it's shown, lossless WebP is a strong replacement for PNG.

Will converting a JPG to WebP lose quality?

A JPG is already lossy, so re-encoding it as lossy WebP is a second round of compression — some quality is technically lost, and because the JPG has already discarded data, the file-size savings are smaller than converting from an original source would give. If you need no further loss, convert from a lossless source (like a PNG) or use WebP's lossless mode. For everyday web photos, the difference is invisible.

Should I use WebP for printing?

No. The print industry has essentially no WebP support — online and local print shops universally ask for JPG, PNG, or TIFF, and that's unlikely to change since file-size savings don't matter for a local file transfer. Convert your WebP to JPG (for photos) or PNG (for graphics) before sending anything to print.