WebP Converter
Convert an image to WebP using your browser's own encoder, with an adjustable quality setting - and a clear error if your browser can't encode WebP.
Upload an image and adjust quality - this tool uses your browser's own WebP encoder to convert it, entirely locally.
More Image / SVG Developer Tools
View all 18For the newer, sometimes even smaller AVIF format instead, see the AVIF Converter - though AVIF encoding support varies more by browser.
What Is WebP?
WebP is a modern image format that typically produces smaller file sizes than JPG or PNG at comparable visual quality, and is now widely (though not universally) supported by browsers.
Why Use This Tool?
Converting to WebP for web performance is common, and doing it via your browser's own built-in encoder (rather than uploading to a third-party service) keeps your image entirely local.
How to Use It
- Upload an image.
- Adjust the quality slider.
- Download the converted WebP file - if your browser can't encode WebP, this tool tells you clearly rather than producing a broken file.
Browser Support
WebP encoding via canvas is supported by most current major browsers, but not guaranteed on every browser/version - this tool checks and reports clearly if encoding isn't available in your current browser, rather than claiming universal support.
Typical Savings
For the same visual quality, WebP files are often 25-35% smaller than JPEG and can be much smaller than PNG for photos. A 400 KB JPEG hero image might become roughly 250-300 KB as WebP; results depend on the image.
Choosing the Quality Setting
| Quality | Use for |
|---|---|
| 85-90 | Product photos and images where detail matters |
| 75-80 | Most website images - a good default |
| 60-70 | Backgrounds and large decorative images |
Compare the result with the original at 100% zoom; if you cannot see a difference, try a lower setting.
Using WebP on a Website
<picture>
<source srcset="hero.webp" type="image/webp">
<img src="hero.jpg" alt="..." width="1600" height="900">
</picture>All current major browsers support WebP; the <picture> fallback is only needed for very old ones. Keep a JPG copy for email and link previews, where WebP support is patchy.
For even smaller files, try the AVIF Converter. Check whether a site's images are optimised with the Image Optimization Checker, and read WebP vs JPG vs PNG.
Frequently Asked Questions
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