Question 1

Which image formats are supported?

Accepted Answer

JPG, PNG and WebP. The tool preserves transparency for PNG and WebP.

Question 2

Does compression hurt quality?

Accepted Answer

Modern compression is nearly lossless at high quality settings. Adjust the slider to balance size and clarity.

Question 3

Is this tool free?

Accepted Answer

Yes. Every UltraTools utility is 100% free with no sign-up, no watermarks and no usage limits.

Question 4

Are my files or data uploaded to a server?

Accepted Answer

No. This tool runs entirely in your browser. Your files and text never leave your device.

Question 5

Do I need to install anything?

Accepted Answer

No installation is required. UltraTools works in any modern browser on desktop, tablet and mobile.

Image Compressor

Frequently asked questions