Images are the biggest chunk of most websites. Compressing them to WebP can cut your total page weight by half or more, improving load speed and your search rankings.
Everything is processed locally in your browser.
How to use this tool
Add your image
Drag and drop your image onto the tool or choose a file.
WebP is pre-selected
WebP is the best format for web delivery today. Start at quality 75.
Check the savings
Watch the size drop in the comparison view — often 50–70% smaller.
Download and use
Download your WebP and use it in your site, WordPress, or CMS.
What a web page actually needs
A photograph displayed at 800 pixels wide does not need to be 4000 pixels wide. Serving the larger file costs your visitor bandwidth, slows the page, and gives them nothing — the browser throws the extra pixels away.
The single most effective thing you can do for page weight is serve images at the dimensions they are displayed at, then compress. Everything else is a smaller win on top.
Targets worth aiming for
| Role on the page | Typical target | Format |
|---|---|---|
| Hero or full-width image | 150–300 KB | WebP or AVIF |
| In-content photograph | 50–150 KB | WebP or AVIF |
| Thumbnail or card image | 10–40 KB | WebP |
| Logo or icon | Under 10 KB | SVG where possible, else WebP |
High-DPI displays, and how to handle them
A Retina-class screen packs two or more device pixels into each CSS pixel, so an image served at exactly the display size looks slightly soft. The usual answer is to serve roughly twice the CSS dimensions and let the browser downscale — an 800-pixel image in a 400-pixel slot. The wider the availability of high-DPI screens, the more this is the default rather than the exception.
A short checklist
- Resize to the displayed dimensions — twice them if you want crispness on high-DPI screens.
- Choose the format for the content: WebP or AVIF for photographs, lossless WebP for screenshots and graphics.
- Compress at a quality setting you have actually looked at, not one you assumed was safe.
- Use <picture> with an AVIF source, a WebP source and a fallback rather than betting on one format.
- Lazy-load anything below the fold so it is not downloaded before it is needed.
Frequently asked questions
What's the best format for web images?
WebP is the best all-round choice today: small files, excellent quality, and support in every major browser. AVIF is even smaller for photos.
How much can web images be compressed?
WebP typically cuts image file sizes by 25–35% over JPG and even more over PNG.
Will compressing images help my SEO?
Yes. Page speed is a ranking factor, and smaller images load faster, especially on mobile.