JPG vs PNG vs WebP: 9 common questions, answered simply

What is the main difference between JPG, PNG and WebP?

JPG uses lossy compression: it throws away small details to make the file smaller. PNG is lossless: it keeps every pixel exactly. WebP can do both, and it can also keep a transparent background and play short animations. JPG cannot do transparency.

Which format is best for photos?

For normal photos, JPG is the safe choice because almost every website, form and program accepts it. WebP is a good choice for your own website, because Google says lossy WebP files are 25–34% smaller than comparable JPG files. PNG is usually the wrong choice for photos: the file gets much bigger without a visible gain.

When should I use PNG instead of JPG?

Use PNG for screenshots, logos, diagrams and images with text or sharp lines. JPG can leave blurry "halos" around letters and edges. Also use PNG when you need a transparent background.

Is WebP better than JPG?

Often, yes, for file size. At similar quality WebP files are smaller, and WebP also supports transparency. The catch is compatibility: some older programs and some upload forms still accept only JPG or PNG. Read the form's list of allowed formats before you upload.

Does converting a JPG to PNG improve the quality?

No. The details a JPG threw away are gone for good. Saving it as PNG keeps the picture exactly as it is now, flaws included, and the file usually gets bigger. Convert to PNG only if a form or program asks for PNG.

Why does my JPG look worse every time I save it?

Each time you open a JPG, edit it and save it again, it is compressed again, and a little more detail is lost. This is called generation loss. Copying the file does not hurt it. Tip: keep your original and always edit a copy.

Which format keeps a transparent background?

PNG and WebP. If you save a picture with a transparent background as JPG, the empty area is filled with a solid colour, usually white or black.

Can I open WebP files on my iPhone or Android phone?

Yes, on current phones. Safari on iPhone supports WebP from iOS 14, and Can I Use lists about 97% of browsers worldwide with WebP support. If an older app cannot open a WebP file, convert it to JPG.

How do I change a picture from one format to another?

Use the free Image Converter. Pick your photo, choose JPG, PNG or WebP, and download. It runs in your browser, so the picture is not uploaded to our server. If the file is still too big for a form after converting, use the Image Compressor.