Compress PNG

Shrink a PNG in your browser by reducing its colours, keeping transparency.

Your files stay on your device — nothing is uploaded.

How to compress a PNG

  1. Drop your PNG on the box above, or click to choose it.
  2. Move the colours slider to trade colours for a smaller file.
  3. Watch the preview to check it still looks good.
  4. Press Download to save the smaller PNG.

Why PNG needs a different approach

PNG is lossless, so simply re-saving it rarely makes it smaller. The real way to shrink a PNG is to reduce the number of colours it uses, which is the idea behind tools like TinyPNG. Fewer colours compress better, and for most graphics the eye cannot tell the difference. One honest note: this tool saves a full-colour PNG, so the savings are real but smaller than a dedicated app that writes a palette PNG. Transparency is kept the whole time.

What kind of PNG shrinks most

Screenshots, logos, icons, charts, and flat graphics shrink a lot, because they use only a small set of colours to begin with. A detailed photo saved as PNG can also shrink, but pushing the colours too low may show banding in smooth areas like a sky. Slide down slowly and stop when the preview starts to look stepped.

Keeping transparency

If your PNG has see-through areas, they stay see-through after compression. That makes this tool safe for logos and cut-out images that need a clear background, which is the main reason people keep an image as PNG rather than JPG.

FAQ

Why doesn't re-saving a PNG make it smaller?

PNG is lossless, so a plain re-save keeps every pixel and stays about the same size. Reducing colours is what actually shrinks it.

Is this lossless or lossy?

Reducing colours is lossy, but for graphics the change is usually invisible. Photos may show some banding if you push the colours very low.

Does it keep transparency?

Yes. Clear areas stay clear, so logos and cut-outs are safe.

How many colours should I use?

Start at the default and slide down while watching the preview. Flat graphics can go quite low; photos need more colours to stay smooth.

Are my files private?

Yes. Everything runs in your browser and nothing is saved.

How does this PNG compressor get files smaller?

It reduces the number of colours in the image, the same idea TinyPNG uses. Fewer colours pack much better, which is the practical way to optimize PNG screenshots and graphics while keeping transparency.