Question 1

Will compression reduce image quality?

Accepted Answer

At the default setting, the difference is barely noticeable while file sizes shrink by 40–60%. You can move the slider to increase or decrease compression strength. PNG uses lossless compression with no quality change.

Question 2

Can I compress multiple images at once?

Accepted Answer

Yes, upload up to 20 files and they'll be compressed in parallel. Download them all as a single ZIP file.

Question 3

Are my images uploaded to a server?

Accepted Answer

No. All compression happens locally in your browser. Your images never leave your device.

Question 4

Which file formats are supported?

Accepted Answer

JPG, JPEG, PNG, and WebP formats are supported, each with format-optimized compression.

Question 5

Why is my compressed file larger than the original?

Accepted Answer

Already-optimized files may not compress further and could end up slightly larger. The tool will indicate "Already optimized" in this case.

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How to compress images

Frequently asked questions