JPG to WebP Converter Online
Cut JPG file size by roughly a third with no visible change in quality.
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JPG, PNG, WebP, BMP · Multiple files supported
How to Convert JPG to WebP?
Nothing is uploaded. The jpg file is decoded and re-encoded as webp inside this tab.
Add your JPG files
Drag them in or use Choose Files. Batches are fine.
WebP is already selected
Leave quality at 90 for photographs. Drop to 75 or 80 if you are optimising a page where every kilobyte counts.
Convert and download
Everything runs locally, so the webp file saves straight to your device.
Why Convert JPG to WebP?
WebP delivers 25, 35% better compression than JPG at equivalent visual quality. Converting your JPGs to WebP reduces page load times and improves Core Web Vitals scores, a direct ranking signal for Google Search.
About JPG
JPG (JPEG) is the default format for digital photos. Its lossy compression produces small files at the cost of some quality. Ideal for photographs, product images, and social media content.
About WebP
WebP is Google's modern image format built for web delivery. It supports both lossy and lossless compression, alpha transparency, and produces files 25, 35% smaller than JPEG at comparable quality. Supported by all modern browsers since 2020.
What Happens to Transparency
Neither side carries transparency here. JPG has no alpha channel to begin with, so the WebP is opaque. WebP itself fully supports alpha, there is simply none present in a JPG input.
File Size: What to Expect
At the default 90% quality setting, WebP typically comes out 25 to 35% smaller than the source JPG at visually equivalent quality. A 400 KB JPG usually lands somewhere around 260 to 300 KB.
When Not to Convert JPG to WebP
Skip this if the JPG is already heavily compressed. You would be re-encoding lossy data with a second lossy codec, which compounds artifacts for very little size gain. Convert from the original export whenever you still have it.
How the Conversion Works
The JPG is decoded to pixels and re-encoded with WebP's VP8 lossy coder at your chosen quality. This is a generational re-encode rather than a repack, so the quality slider matters more here than it would for a lossless target.
Other JPG and WebP Conversions
Every pairing runs on the same browser-based converter.
Need a pairing that is not listed? The full image converter covers every combination of JPG, PNG, WebP and BMP.
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Frequently Asked Questions
Common questions about converting JPG to WebP online.
Why convert JPG to WebP?
WebP delivers 25, 35% better compression than JPG at equivalent visual quality. Converting your JPGs to WebP reduces page load times and improves Core Web Vitals scores, a direct ranking signal for Google Search.
What happens to transparency when converting JPG to WebP?
Neither side carries transparency here. JPG has no alpha channel to begin with, so the WebP is opaque. WebP itself fully supports alpha, there is simply none present in a JPG input.
How much will the file size change?
At the default 90% quality setting, WebP typically comes out 25 to 35% smaller than the source JPG at visually equivalent quality. A 400 KB JPG usually lands somewhere around 260 to 300 KB.
When should I not convert JPG to WebP?
Skip this if the JPG is already heavily compressed. You would be re-encoding lossy data with a second lossy codec, which compounds artifacts for very little size gain. Convert from the original export whenever you still have it.
Do all browsers support WebP?
Yes. Chrome, Edge, Firefox and Safari have all shipped WebP support since 2020, as have all current mobile browsers. Only legacy desktop software and some older email clients still lag behind.
Is WebP better than JPG for Core Web Vitals?
Generally yes. Smaller image bytes reduce Largest Contentful Paint on image-led pages, and LCP is one of the Core Web Vitals Google uses as a ranking signal.
Are my JPG images uploaded to a server?
No. The conversion runs entirely in your browser. Your JPG files never leave your device and are never sent anywhere.