MotionShine01 / Pick
Set the quality
75 percent keeps 256 colours, which looks the same as the original for most screenshots. Lower it for fewer colours and a smaller file.
Free tool
Compress PNG files.
Make PNG screenshots, logos and graphics much smaller and keep them as PNG, with their see-through parts. The colours are cut to a smart palette of up to 256, the way TinyPNG works, and the file is packed as tightly as it can be. It runs in your browser, so nothing is uploaded.
This runs in your browser. Your pictures are never uploaded.
How it works
Three steps, nothing to install.
02 / Drop
Add the PNGs
Drop one or many. Each one is compressed in the page.
03 / Save
Download them
See the saving for each file, then download them one by one or in a ZIP.
Questions
Good to know.
Are my pictures uploaded?
No. They are compressed in this tab with your browser, so they never leave your computer.
How does it compress a PNG?
It finds the best palette of up to 256 colours for the picture with UPNG.js, spreads the small colour errors so gradients and photos stay smooth, then packs the file with OxiPNG. Colours already in the palette are kept exactly, so flat parts of a screenshot stay clean.
Is it lossless?
No, it is lossy: most pictures have far more than 256 colours, and some are merged. On screenshots, logos and icons the change is very hard to see. A PNG that already has 256 colours or fewer keeps every colour exactly.
Does it keep transparency?
Yes. See-through and half see-through parts are kept in the palette.
How is this different from TinyPNG?
The idea is the same: fewer colours for a PNG. The difference is where it runs. TinyPNG uploads your pictures to its server and keeps them for up to 48 hours, and its free web page takes up to 20 pictures of up to 5 MB each (checked on its site on 15 October 2026). This page compresses in your browser, so nothing is uploaded and there is no 5 MB cap. We have not compared the file sizes of the two side by side.
Can I do many at once?
Yes. Drop several together, then download them one by one or all at once in a ZIP file.
What if a picture does not get smaller?
If the result would be larger, the original is kept and the list says so.
Which browsers work?
Current Chrome, Edge, Safari and Firefox. Safari cannot save WebP files, so it saves those as PNG.