Compress a PNG With Transparency

A gentle setting tuned for logos, icons and cut-outs where clean edges matter most.

Upload the transparent PNG.
It is compressed gently, alpha intact.
Download it with clean edges.

Transparency is the reason most people are stuck with PNG in the first place, and it is the thing crude compression damages first. Semi-transparent edge pixels — the soft fade around a logo or a cut-out subject — need enough palette entries to stay smooth, or they turn into a visible stair-step fringe.

This preset stays at 256 colours for that reason. It saves less than the aggressive settings and keeps edges clean, which is the right trade for artwork that will sit on top of other things.

Guides about Compress a transparent PNG

Choosing a format When You Should Not Compress a PNG Palette reduction is permanent. Keep the original or lose it forever. 4 min read

More compresspng.org tools

Shrink a PNG Reduce a PNG in the browser — no install, no upload limit games, no watermark on the way out. Batch compress PNGs Drop in a folder's worth of PNGs and get them all back in one download. Compress a large PNG For the multi-megabyte exports: caps the longest edge at 2560px and reduces the palette hard. PNG to WebP Transparency like PNG, file sizes closer to JPEG. The modern answer for the web.

Frequently asked questions

Does PNG compression destroy transparency?

It should not, and it does not here — the palette is built including the alpha channel. What crude tools damage is the smoothness of semi-transparent edges, which is why this preset stays gentle.

My logo has a jagged fringe after compressing elsewhere. Why?

Too few palette entries were left for the partially transparent edge pixels, so the soft fade was quantised into hard steps. A gentler setting fixes it.

Can I convert a transparent PNG to JPG?

You can, but JPEG has no transparency, so the transparent areas will be filled with a solid colour. Use WebP if you need both transparency and a small file.