Question 1

Is my image uploaded to a server?

Accepted Answer

No. Compression runs entirely in your browser with a local library. Your image never leaves your device.

Question 2

Does compression preserve transparency?

Accepted Answer

Yes, when the output format supports it (PNG or WebP). JPG cannot store transparency, so transparent areas become a solid background.

Question 3

How much smaller will my image get?

Accepted Answer

It depends on the image. Photos often shrink 50–80% at 70–80% quality with little visible loss; simple graphics shrink less.

Question 4

Is it free?

Accepted Answer

Yes, free with no sign-up.

Question 5

What quality should I choose?

Accepted Answer

70–80% is a good balance for photos — much smaller files with little visible loss. Use higher quality for graphics with text or sharp lines.

Image Compressor