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.

Should every image on my site be WebP?

For photographs and illustrations, yes. Keep SVG for logos and icons — it is vector and already tiny.

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 for Your Website

Images are usually the heaviest part of a web page and the main cause of a poor Largest Contentful Paint score. Compressing them is the single highest-impact speed fix available.

This page defaults to WebP output, the best format for modern websites.

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

Target sizes by role

Budget your bytes according to how big the image appears on screen.

Hero / banner: 150–300KB at up to 1920px wide
In-article images: 80–150KB at up to 1200px wide
Product photos: 60–120KB at up to 1000px wide
Thumbnails and avatars: under 30KB

Beyond compression

Pair compressed images with width and height attributes to prevent layout shift, loading="lazy" for below-the-fold images, and responsive srcset so phones never download desktop-sized files.

Frequently asked questions

Related tools and guides

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