Image Compressor

No. Every image is decoded, resized and re-encoded by your own browser using Canvas and Web Workers. Nothing is transmitted, so private photos, client work and screenshots containing sensitive data never leave your device. The page keeps working if you go offline after it loads.

Switch the mode from Quality to Target size and type the number of kilobytes you need. The tool then runs a binary search over the encoder quality, re-encoding the image up to eight times, and keeps the highest quality result that still fits under your limit. If even the lowest quality overshoots the target, the result is flagged as above target rather than silently failing.

WebP is the safest default and is typically 25 to 35 percent smaller than JPEG at matching quality, with support in every current browser. AVIF compresses smaller still, often 50 percent below JPEG, but encoding is slower and not every browser can create it. Keep JPEG only when a tool or client insists on it. Use PNG for flat graphics, logos and screenshots with sharp edges, or when you need lossless output.

The U²-Net model runs in your browser and predicts which pixels belong to the main subject. The tool then softens detail outside that subject before encoding. Because blurred regions contain far less high-frequency information, the encoder spends dramatically fewer bits on the background while the subject keeps its full sharpness, so the file gets smaller without the subject looking degraded.

U²-Net is about 4.4 MB and RMBG-1.4 is about 42 MB. Each is downloaded once and stored in the browser Cache API, so later visits load it instantly with no network request. The AI features are entirely optional and off by default, so you never pay that cost unless you switch one on.

Yes. Re-encoding through Canvas rebuilds the file from raw pixels, so EXIF blocks, GPS coordinates, camera model, serial numbers and editing history are all discarded. The tool does read the EXIF orientation flag before discarding it, so portrait photos from a phone stay the right way up instead of coming out sideways.

PNG is lossless, so the quality slider has no effect on it and a re-encode can be slightly larger if the original was optimised by a dedicated tool. If a PNG does not need transparency or pixel-exact fidelity, convert it to WebP instead, which is usually far smaller. Auto format does this for you.

You can process up to 60 images at a time and each file may be up to 60 MB. There is no daily cap, no account, no watermark and no queue, because the work happens on your computer rather than on a shared server.

Lossy formats such as JPEG, WebP and AVIF discard detail the eye is least likely to notice, so there is always some loss, but between roughly 75 and 85 percent quality the difference is very hard to see while the file is often a fraction of the original. Use the before and after slider to judge each image, and raise the quality if you can spot artefacts.

Yes. The layout is fully responsive and the drop zone opens the camera roll on iOS and Android. Very large batches and the 42 MB RMBG-1.4 model are heavier on a phone, so the smaller U²-Net model is the better choice on mobile.