What is WebP and why convert to it?
WebP is a modern image format from Google that combines lossy and lossless compression to make files roughly 25–35% smaller than JPG or PNG at the same visual quality, while still supporting transparency and animation. Smaller images mean faster pages, lower bandwidth and better Core Web Vitals — signals Google rewards in search rankings. This tool converts a single image or a large batch to WebP entirely in your browser, with full control over quality and dimensions, and your files never leave your device.
How Image to WebP works
How to convert images to WebP
- Add your images. Drag and drop them onto the box, or click Add Image(s). Drop one file or hundreds at once.
- Pick quality and size. Choose a WebP quality (90% is a great default) and an optional scale to shrink or enlarge. Every image re-converts instantly when you change a setting.
- Download. Save each result with its Download button, or click Download All to get every converted image in a single ZIP.
One image or thousands — in the same page
There is no separate bulk tool to hunt for. Drop a single screenshot and you get one clean WebP; drop an entire folder of product photos and they all convert in a queue, each shown as a card with a live thumbnail and the exact before-and-after file size. That makes it equally good for a quick one-off conversion and for batch-optimising every image on a website.
WebP vs JPG vs PNG
| Format | Best for | Transparency | Typical size |
|---|---|---|---|
| WebP | Almost everything on the web | Yes | Smallest |
| JPG | Photographs | No | Medium |
| PNG | Logos, graphics, screenshots | Yes | Largest |
Choosing the right quality
WebP quality runs from 10% to 100%. For photos, 75–90% looks visually lossless while cutting file size dramatically. For graphics with flat colour you can often go lower. Watch the percentage saved on each card to find the sweet spot for your images.
Is it private?
Yes. Conversion uses the browser's built-in canvas engine, so your images are never uploaded to a server. The tool even works offline and keeps confidential images completely private.
Common uses
- Shrink website images to speed up page loads and improve SEO
- Bulk-convert a whole folder of photos to WebP in one go
- Reduce image bandwidth and storage costs
- Convert heavy PNG screenshots to lightweight WebP
- Prepare optimised images for WordPress, Shopify or static sites
- Turn JPG product photos into smaller WebP files
- Pass Core Web Vitals and PageSpeed image checks
- Create WebP assets for apps and games