How it works
- Select or drop one or more images.
- Adjust quality, approximate target and whether dimensions should stay unchanged.
- Compress the files locally.
- Download each result or one ZIP for the entire batch.
Practical example
A 2.4 MB JPG photo may be reduced to a few hundred KB depending on its content, selected quality and dimensions.
Formula and explanation
The browser decodes each image and encodes it again at the selected quality.
For JPG and WebP, Cifrivo can search for a quality close to the target. PNG uses the browser's lossless encoding.
If preserving dimensions would make the result larger, the original file is kept instead.