Are my images uploaded to a server?

No. OPTIMIZE IMAGE runs the entire compression inside your browser using the Canvas and Blob APIs. Your photo never leaves your device, so there is nothing for us to store, log or leak.

Does WebP support transparency?

Yes — it handles an alpha channel like PNG, while staying much smaller.

Is it really free and unlimited?

Yes. There is no sign-up, no watermark and no per-file limit. Because the work happens on your own device, there are no server costs to pass on to you.

Compress Images to WebP

WebP is the best all-round web format available today: smaller than JPG at matching quality, and it supports transparency like PNG. This page defaults to WebP output.

Every current browser supports WebP, so it is safe for websites, apps and most upload forms.

Image Compressor

Runs on your device — no upload

Drop an image here

or click to browse, or paste from your clipboard with Ctrl/Cmd + V

JPG · PNG · WebP · AVIF · BMP · GIF — up to 40 MB

WebP vs JPG vs PNG

At the same perceived quality, WebP files are usually 25–35% smaller than JPG and 25–50% smaller than PNG. That translates directly into faster pages and better Core Web Vitals scores.

When not to use WebP

A few destinations still expect the older formats.

Government or exam portals that explicitly require JPG or PNG
Legacy desktop software and older printing workflows
Anywhere the accepted-formats list does not mention WebP

Frequently asked questions

Related tools and guides

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