How it works
- 1
Add PNG images
Choose PNG screenshots, illustrations, logos, or transparent graphics.
- 2
Optimize the palette
The browser reduces unnecessary color data while retaining PNG output.
- 3
Check the savings
Compare the measured output and download each file or one ZIP.
Why use this tool?
Transparency retained
PNG output keeps the alpha channel used by transparent graphics.
Private by design
Files never leave the browser for optimization.
Batch friendly
Images run sequentially to limit peak memory on phones and tablets.
Common examples
Transparent logos
Reduce a logo or icon while retaining transparent pixels in PNG output.
UI screenshots
Optimize screenshots before publishing product documentation or release notes.
Upload a source above to see measured original bytes, output bytes, and percentage saved for your own image.
Privacy and limits
Optimization happens in this tab. We do not upload the selected image or send its filename to analytics.
- Palette reduction can create banding in photographs or smooth gradients.
- PNG is often larger than WebP or AVIF for photographic images.
- Animation is not retained; the tool processes one still image.
Frequently asked questions
Does PNG compression keep transparency?
Yes. The result remains PNG and retains its alpha channel.
Is this lossless?
The optimizer can reduce the color palette, so it should be treated as visually lossy compression. Always preview important artwork.
Should photos use PNG?
Usually not. JPEG, WebP, or AVIF typically produces smaller photo files.