Question 1

Are my images uploaded to a server?

Accepted Answer

No. All compression happens inside your browser using WebAssembly. Your images never leave your computer. You can disconnect your internet after the page loads and the tool still works.

Question 2

What formats are supported?

Accepted Answer

JPG, PNG and WebP. Output keeps the same format as the input.

Question 3

Is there a file size limit?

Accepted Answer

Each file can be up to 50 MB. You can compress 1 to 10 images at a time. Larger files take more memory and may take longer depending on your device.

Question 4

How much can I save?

Accepted Answer

Photos in JPG typically compress 60-80% with no visible quality loss. PNGs compress 10-20% losslessly. The slider gives you full control.