Compress & Convert Images to WebP
Compress WebP images and convert JPG and PNG to WebP in one step, right in your browser. WebP files run about 25 to 35 percent smaller at the same quality, with no upload and no limits.
Unlimited images, No File Size Limits.
Why use CompressImage.io to compress and convert to WebP?
-
No Limits
As the compression is happening in the Browser, there are no limits on how many images you can convert or what size of image you can convert.
-
100% Private
Since no images are sent to any servers, your images are totally safe and private as no one else can see your images.
-
Low Carbon Footprint
Since no servers are involved in the compression process, zero extra electricity is used, hence no carbon emitted.
How to Convert to WebP
- 1
Add your images
Drag your JPG or PNG images onto the tool or click Select Files. Convert to WebP is turned on by default on this page.
- 2
Each image converts to WebP right away
Your browser converts and compresses every image to WebP as you add it. Nothing is uploaded. The conversion runs locally with WebAssembly.
- 3
Download your WebP files
Save each .webp file on its own or download them all as a ZIP. Adjust quality in Settings to trade size against fidelity.
Why convert to WebP
WebP is the most practical way to make images smaller without a visible drop in quality, and this tool converts them in the browser so your files are never uploaded. Compared with the older formats, WebP brings three things to the table:
- Files around 25 to 35 percent smaller than JPEG and PNG at matching quality.
- Built-in transparency, so it can stand in for transparent PNGs.
- One format that covers both photos and graphics.
You can convert as many images as you want, free, with no account.
How WebP compression works
WebP supports lossy compression like JPEG, which suits photos, and lossless compression with transparency like PNG, which suits graphics. Because one format covers both jobs, you can drop WebP in place of JPEG and PNG across a whole site, simplify your asset pipeline, and cut total page weight at the same time.
Images are usually the heaviest part of a web page, so moving to WebP often gives load times and Core Web Vitals a real lift, which feeds directly into SEO.
Need a different format?
Reach for the PNG compressor when you need lossless output, the JPEG compressor for straight photo compression, or the all-in-one image optimizer to mix and match.
Frequently Asked Questions
What is WebP and why is it smaller?
WebP is a modern image format from Google that compresses more efficiently than JPEG and PNG. At the same visual quality, WebP files are usually 25 to 35 percent smaller, which means faster page loads.
Do all browsers support WebP?
Yes. Every current version of Chrome, Edge, Firefox, Safari, and Opera supports WebP, as do all modern mobile browsers. It is safe to use across the web today.
Does WebP support transparency like PNG?
Yes. WebP has an alpha channel, so it can replace transparent PNGs while producing a much smaller file.
Is the WebP conversion done on a server?
No. Conversion runs entirely in your browser with a WebAssembly encoder. Your images are never uploaded, so the tool stays private and works offline.
Can I control WebP quality?
Yes. Use the quality slider in Settings to balance size against fidelity. Higher quality means a larger file, lower quality a smaller one. The default is tuned for a good middle ground.