01 / GUIDE
How to use Compress images
- Add an image and choose its output format.
- Adjust quality and check the estimated setting.
- Compress, compare exact sizes, and download if the result suits you.
02 / DETAILS
About this conversion
Choose an output format and quality, then see the exact byte difference before saving. The source image is not replaced.
Reducing quality may reduce file size, but the result depends on the picture and format. PNG is lossless in this workflow; JPEG and WebP quality settings can change visual detail.
Limits to know
Each input is limited to 40 MiB and 16 megapixels so the browser has a safer memory budget. Very large dimensions can still exceed the memory available on a phone.
Processing runs in this browser. Originals are not overwritten, and the output size is measured in bytes before download. Keep a backup of important files.
03 / FAQ
Questions people ask
Will compression always shrink the file?
Not always. Images already optimized for a format may grow; the tool reports the actual byte counts.
Does lower JPEG quality affect appearance?
Yes. Lower quality can reduce detail or add visible artifacts; inspect the preview before downloading.
04 / EXPLORE