Compress PNG
Make PNG files dramatically smaller. Colour reduction converts images to an optimised palette of up to 256 colours (with transparency), then OxiPNG squeezes out the last bytes.
Processed locally in your browser
How to use
- 1
Add your PNG files.
- 2
Choose the number of colours — 256 looks near-identical for most graphics — or switch to lossless.
- 3
Compress and download.
Frequently asked questions
Is PNG compression lossless?
Lossless mode (OxiPNG) keeps every pixel. Colour reduction is lossy but usually invisible for graphics, icons and screenshots.
Is transparency kept?
Yes, including smooth semi-transparent edges.
Are my images uploaded?
No. This tool runs entirely in your browser, so your images never leave your device.