Are my images uploaded to a server?

No. All compression happens locally in your browser using the Canvas API — nothing is uploaded.

Which format gives the smallest file?

WebP usually produces the smallest files and keeps transparency. JPEG is great for photos without transparency. PNG stays lossless.

Image Compressor

Reduce image file size without noticeable quality loss.

Processed on your device. Your files never leave your browser.

Drop images here or click to browse

JPG, PNG or WebP — compressed on your device. Nothing is uploaded.

Output format

Quality: 70%

Max width/height (px)

About Image Compressor

This image compressor shrinks JPG, PNG and WebP files right in your browser using the Canvas API. Adjust the quality, optionally cap the maximum dimension, and download a much smaller file — your photos never leave your device.

How to use

1Drop one or more images, or click to browse.
2Choose an output format and drag the quality slider.
3Optionally set a maximum width/height to downscale large photos.
4See the size saved for each image and download them individually or all at once.