Compress PNG

Make PNG files smaller, losslessly or with fewer colours. Transparency is kept.

Files

Add a file to see a preview.

Add PNG files, or drop a whole folder.
Choose "Reduced colours" for the smallest files, or "Lossless" to keep every pixel exactly.
Press Compress and check the size of each file.

What does "reduced colours" do?: The picture is redrawn with at most 256, 64 or 16 colours. Screenshots, logos and drawings usually look the same and become much smaller. Photographs can show banding at 64 or 16 colours.
What does "lossless" do?: The file is repacked more efficiently without changing a single pixel. The saving is smaller, but nothing is lost.
Is transparency kept?: Yes. Transparent and semi-transparent areas stay as they are.
Why did reducing colours not help?: Some pictures do not get smaller with fewer colours. The tool then keeps the lossless result, so the file is never larger than the best lossless version.
Is metadata removed?: Yes. Text comments, camera details and time stamps are left out of the result.