Choose your PNG files
Add still PNG images, such as screenshots, icons or graphics with transparency.
ON YOUR DEVICE
Compress PNG
Compress PNG files with lossless optimization. Keep transparent backgrounds and pixel values while reducing unnecessary storage.
Drop your images here
PNG only · Up to 100 images
Files stay on your device
Three simple steps
Run lossless compression
The encoder optimizes how PNG data is stored. There is no quality level to choose.
Check the savings
Compare the original and result, review bytes saved, and download the smaller file or unchanged original.
Common questions
Is PNG compression lossless?
Yes. This page optimizes the PNG encoding without lowering image quality. Pixel values, dimensions and transparency are preserved.
Why is there no quality slider?
PNG optimization uses a lossless encoder. A JPG-style quality slider would not control this operation, so this page has no quality setting.
Will transparent areas remain transparent?
Yes. PNG output keeps alpha transparency. The comparison uses a checkerboard so you can see transparent areas.
Why did my PNG stay the same size?
An optimized PNG may offer little room for further reduction. If the new encoding is not smaller, we return the original bytes. For a larger reduction, try WebP conversion or resize the image and inspect the result.
Are my images uploaded?
No. Compression runs in your browser. Encoder files may be downloaded from this website, but your selected images are not uploaded.