Convert images to WEBP for smaller files, or turn WEBP images back into PNG or JPG. Everything happens in your browser — no uploads, no sign-up.
1. Choose an image file. 2. Pick what to convert it to — WEBP, PNG or JPG. 3. Set the quality and click Convert Image, then download your file.
WEBP is Google's modern image format, and it is quickly becoming the standard for websites. A WEBP picture looks the same as a JPG or PNG picture, but the file is much smaller — often around 25 to 35 percent smaller than a JPG of the same quality, and far smaller than a PNG. Smaller files mean faster websites, less mobile data, and quicker uploads. This free WEBP converter turns your JPG and PNG images into WEBP in your browser, and it can also turn WEBP images back into PNG or JPG when you need the older formats. Nothing is uploaded anywhere, because the whole conversion happens on your device.
Why does file size matter so much? Every image on a website has to be downloaded by the visitor, and on a slow mobile connection a page full of big JPG files can take many seconds to load. Visitors leave slow pages, and Google ranks slow pages lower in search results. Bloggers, shop owners and anyone who uploads pictures to the internet can make their pages noticeably faster just by converting images to WEBP. The format also supports transparency like PNG and animation like GIF, so one format can replace several older ones. All modern browsers — Chrome, Edge, Firefox and Safari — now support WEBP, so it is safe to use almost everywhere.
Sometimes you need to go the other way. You might download a WEBP picture from the internet and find that an old program or a website form only accepts JPG or PNG. Or you might need a PNG for a logo that must keep its transparency perfectly. This converter handles both directions: pick WEBP to make files smaller, pick PNG for exact quality and transparency, or pick JPG for the widest compatibility with older software. The quality slider works for WEBP and JPG; PNG is always saved at full quality, because PNG never throws away detail.
Take a JPG photograph that is 800 kilobytes. Upload it, choose WEBP, leave the quality at 90 percent, and click Convert Image. The WEBP version is often around 550 kilobytes — roughly 30 percent smaller — and it looks the same on screen. Now take the same picture as a PNG, which might be 2.5 megabytes, and convert that to WEBP. The result is often under 600 kilobytes, which is about four times smaller than the PNG. These are typical results: the exact saving depends on the picture, because a busy photograph with lots of detail compresses less than a simple graphic with flat colours. The converter shows you the original size, the new size and the percentage saved, so you can see the exact result for your own picture.
Now suppose you download a picture from a website and it is saved as a WEBP file, but the form you need to upload it to only accepts JPG. Upload the WEBP file here, choose JPG as the target, set the quality to 92 percent, and click Convert Image. The converter draws the WEBP picture onto a canvas and saves it as a JPG with the same width and height in pixels. The JPG will be bigger than the WEBP — perhaps 800 kilobytes instead of 550 — because JPG is a less efficient format, but it will open in every program and upload to every website. If the picture has transparency, choose PNG instead of JPG, because PNG keeps the transparent parts and JPG fills them with white.
The converter reads your image in the browser, draws it onto a hidden canvas, and saves the canvas in the format you chose. For WEBP and JPG, the quality number controls how much compression is used: a higher number keeps more detail and a bigger file, a lower number makes a smaller file with more visible damage. For PNG, quality is ignored because PNG always saves every pixel exactly. When the target is JPG or WEBP, the converter first fills the canvas with white, because those formats have no transparency — any see-through pixel would otherwise turn black. When the target is PNG, the transparency is kept as it is.
WEBP compresses better than JPG for two reasons. First, it uses a smarter maths trick to describe blocks of pixels, so it can store the same picture with fewer numbers. Second, it can store transparency and use lossless compression like PNG, so it can replace both JPG and PNG in many cases. Google's own tests found WEBP files about 25 to 35 percent smaller than JPG files of the same quality, and lossless WEBP files about 26 percent smaller than PNG files. Your own results will vary with the picture, but the saving is real and it is why so many big websites — including Google, Facebook and eBay — now serve their images as WEBP.
Use WEBP for websites. It makes pages load faster and use less mobile data. Use 90 percent quality. It looks the same as the original for most photos. Use PNG for transparency. If your picture has see-through parts, convert it to PNG to keep them. Use JPG for old software. If a program cannot open WEBP, convert the picture to JPG instead. Check the saving. The converter shows the size change, so you can see exactly how much smaller your file became.
Converting a transparent logo to JPG or WEBP with a white fill. Lossy WEBP and JPG do not keep transparency the same way PNG does — use PNG for logos that need a clear background. Using very low quality. Below 50 percent, photos show blocky patches, especially in skies and skin. Expecting the same saving on every picture. A busy photograph saves less than a simple graphic, so check the result size each time. Converting a WEBP to WEBP again. Every lossy save throws away a little more detail, so always convert from the best original you have. Using an old browser. Very old browsers cannot save WEBP files — update Chrome, Edge, Firefox or Safari if the converter shows a warning.
Pro Tip: If you run a blog or an online shop, convert all your product and article images to WEBP at 85 to 90 percent quality. Your pages will load noticeably faster, visitors will stay longer, and Google rewards fast pages with better rankings.
Note: Your images are converted entirely in your browser and are never uploaded to any server. WEBP and JPG do not support transparency the same way PNG does — transparent parts may become white, so use PNG for logos that need a clear background.
Is this WEBP converter free? Yes, it is completely free, with no sign-up, no download and no limit on how many images you convert.
Are my images uploaded anywhere? No. The conversion happens in your browser on your own device. Your pictures are never sent to a server or stored.
How much smaller is WEBP than JPG? Usually around 25 to 35 percent smaller at the same quality, though the exact saving depends on the picture. The converter shows you the exact size change for your image.
Can I convert WEBP back to JPG or PNG? Yes. Choose JPG for the widest compatibility or PNG for exact quality and transparency.
Why does my transparent logo get a white background? JPG and lossy WEBP do not keep transparency the same way PNG does. For logos with a clear background, convert to PNG instead.
Does every browser support WEBP? All modern browsers do — Chrome, Edge, Firefox and Safari. Very old browsers may not, so use JPG if you need to support them.
Can I convert more than one image at a time? This tool converts one image per click. For more images, repeat the steps for each file.
Does it work on my phone? Yes. It works in any modern browser on a phone, tablet or computer, with no app to install.