Shrink image files in the browser without uploading originals, using local-first processing and practical defaults.
Your photos won't shrink or blur. Keeps original dimensions and sharpness while only reducing file size (MB).
You can also click to choose files.
Supported formats: JPEG, PNG, WebP, AVIF.
Drop entire folders at once or seamlessly process ZIP archives with Pro.
Some formats may produce different results depending on your browser environment.
This desert photo was compressed in KaruImg using the same in-browser process you get on the homepage. Drag the slider to compare the detail with the smaller file size.
Sample photo licensed via Unsplash
This works best when you need smaller files for uploads, blog publishing, or email, but do not want to send the original image through another service first.
If an image is already the right size but still feels too heavy, compression is usually the first thing to try. It is especially useful for blog images, email attachments, content handoff, and social assets.
The best result is not the smallest possible file. It is the smallest file that still looks the same where it will be used. If the image already looks efficient, keeping the original is often the better outcome.
Drop in your images and let KaruImg lighten them in your browser. If there is no real size win, it safely keeps the original.
Fast and safe processing directly inside your browser without any installations or server uploads. Your files never leave your device.
If there’s no size benefit, we keep the original—without degrading quality.
No complicated quality sliders. We analyze each file and automatically choose the best compression settings.
Zero-config • Local-first • Privacy-focused
