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

Every time you save or export an image, you pick a format, usually without thinking about it. Most of the time the default is fine. But choose wrong and you end up with a logo that looks fuzzy, a photo that weighs four megabytes, or a website that loads slowly. This guide gives you a plain-English answer to the question people actually ask: for this particular image, should it be a JPG, a PNG or a WebP?

Different images want different formats: photos, graphics and web images each have a best choice.

The 60-second answer

If you remember nothing else, remember this:

• Photographs you will share, email or upload should be JPG. It is small and opens everywhere.
• Logos, icons, screenshots and anything with a transparent background should be PNG. It stays sharp and supports transparency.
• Images on your own website should be WebP. It looks the same as a JPG or PNG at a much smaller size, so pages load faster.

Everything below is just the detail behind those three rules. You can convert any image to the right format in your browser with our free image converters.

JPG: the universal default

JPG (also written JPEG) has been the standard photo format since the 1990s, and that long history is its strength. There is almost no device, app, website or printer that cannot open a JPG. It is a lossy format, which means it throws away a little detail to keep the file small, but for a photograph that loss is invisible.

Reach for JPG when you are dealing with a photograph that needs to go out into the world: an email attachment, a form upload, a print order, or a picture sent to someone on a different device. What JPG cannot do is store a transparent background or keep text and sharp lines perfectly crisp, which is where PNG comes in.

PNG: for graphics and transparency

PNG is lossless, so it keeps every pixel exactly as it is. That makes it the right choice for anything with hard edges or flat colour: a logo, an icon, a screenshot, a diagram, or a graphic that needs a see-through background. A logo saved as a PNG stays crisp; the same logo saved as a JPG often picks up a faint grey haze around the edges.

The trade-off is size. Because PNG keeps everything, a photograph saved as a PNG can be several times larger than the JPG version for no visible gain. The simple test: if the image is a picture, use JPG or WebP; if it is a graphic or needs transparency, use PNG. For a closer head-to-head, see our JPG vs PNG comparison.

WebP: for the web

WebP is the modern format built for websites. It holds the same visible quality as a JPG or PNG, including transparency, at roughly a quarter to a third smaller. On a web page, where images are usually the heaviest thing to load, that size saving is the difference between a fast site and a sluggish one. Every current browser supports it.

Use WebP for images you are putting on your own website or app. The one place to avoid it is anywhere outside your control, such as email newsletters or older software, where support can still be patchy. If you have a folder of PNGs or JPGs to switch over, our PNG to WebP converter does it in the browser, and you can turn a stray WebP back into a JPG with the WebP to JPG tool. There is a fuller breakdown in our WebP vs PNG guide.

What about HEIC and AVIF?

Two newer formats come up often. HEIC is what your iPhone shoots by default; it is efficient but awkward to share, so most people convert it to JPG before sending it on, which we cover in HEIC vs JPG. AVIF is the newest web format and is even smaller than WebP, though it takes longer to create and support is still catching up. For most people today, WebP remains the practical web choice.

Which is smallest, and which is fastest?

For a web page, the order from smallest to largest is usually AVIF, then WebP, then JPG, with PNG the heaviest for photos. Since image weight is the biggest factor in how fast a page loads, picking a modern format is one of the easiest speed wins there is. We go deep on this in the best image format for website speed.

One more: SVG for logos and icons

There is a fourth format worth knowing for one specific job. If you are working with a logo or a simple icon and you have it as an SVG, keep it as an SVG. Unlike the formats above, an SVG is made of drawing instructions rather than pixels, so it stays razor-sharp at any size, from a tiny favicon to a full-screen banner, and the file is usually tiny. Use PNG when you only have a pixel version or need to place the graphic into something that will not accept SVG, and reach for SVG whenever you have the choice for interface icons and logos.

The simple rule to remember

You do not have to memorise a chart. Just ask what the image is and where it is going. A photo heading out to other people is a JPG. A logo, icon or anything transparent is a PNG. An image living on your own website is a WebP. Get those three right and you have made the correct call for almost every image you will ever save.