Are my images uploaded to a server?
No. All compression happens locally in your browser — your photos never leave your device, unlike upload-based compressor sites.
Compress Images Online
Shrink JPG, PNG, and WebP images to an exact file size or a quality level you choose — in batch, with a ZIP download. Everything runs locally in your browser, so your photos never leave your device.
Frequently asked questions
How does compressing to an exact size like 100KB work?
CutFast runs a quick search over quality levels to find the highest one that fits under your limit. If even the lowest quality is still too big, it scales the resolution down slightly and searches again — so you always get the sharpest image that fits.
Should I choose JPG or WebP output?
WebP is usually 20–30% smaller than JPG at the same visual quality and works in every modern browser. Pick JPG when the file must open in older software or strict upload forms that only accept .jpg.
Why did my image get slightly smaller in resolution?
That only happens in target-size mode when the limit can't be reached by lowering quality alone. CutFast reduces the dimensions just enough to fit and marks the result, so you know exactly what changed.