Compress images locally,
without uploading
Automatically make images lighter on your device, with zero server uploads. Add many files at once, and we'll safely keep your originals if there's no more size to save.
Your photos won't shrink or blur. Keeps original dimensions and sharpness while only reducing file size (MB).
Drag & drop JPEG, PNG, WebP, or AVIF images
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.
A real photo, compressed on-device.
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
Smart compression, strictly private by design.
Drop in your images and let KaruImg lighten them in your browser. If there is no real size win, it safely keeps the original.
Processed right on your device
Fast and safe processing directly inside your browser without any installations or server uploads. Your files never leave your device.
Smartly keep the original
If there’s no size benefit, we keep the original—without degrading quality.
Automatic optimization flow
No complicated quality sliders. We analyze each file and automatically choose the best compression settings.