How to compress a PNG
- Drop your PNG files into the box above or press Browse files.
- Move the color reduction slider down one step at a time.
- Set a smaller scale if the image is bigger than you need.
- Press Compress and check the preview and saving for each file.
- Save each PNG or download them all as one ZIP file.
What this PNG compressor gives you
- Full transparency support for logos and cutouts.
- Step by step color reduction instead of one harsh jump.
- Optional scaling for much bigger savings.
- The final size and dimensions for every file.
- Great results on screenshots and logos. Icons and charts shrink well too.
- No upload and no watermark.
How does a PNG compressor work?
JPG has a quality dial because it is lossy. You tell it how much detail to drop. PNG has no such dial. It is lossless. The file must rebuild every pixel exactly. So the only way to make it much smaller is to give it less to describe.
This PNG compressor does that in two ways. First it cuts the number of colors. A PNG with fewer colors packs far better. Its internal filters find much more repetition. Second it can shrink the image. Fewer pixels mean a smaller file.
Both are visible changes that you choose. That is more honest than a slider that pretends the saving is free.
Which images compress well as PNG?
- Logos, icons and flat drawings that already use few colors.
- App and website screenshots with large areas of the same color.
- Charts, diagrams and line art with clean fills.
- Pixel art and simple game sprites.
Photos are the poor case. They hold millions of slightly different colors. Fewer colors make skies and skin band long before the file gets much smaller. The right answer for a photo PNG is a format change. The PNG to JPG converter often saves 90 percent or more with no visible loss.
How to read the color reduction slider
| Bits per channel | Possible colors | What you see |
|---|---|---|
| 8 (off) | 16.7 million | Original image |
| 6 | 262,144 | No change on most graphics |
| 4 | 4,096 | Gradients band but flat art looks fine |
| 2 | 64 | A bold poster style |
Start high and check the saving. Step down until you see a change. Then go back one step. Each image has its own limit. The preview next to each result shows it clearly.
Scale is the bigger PNG compressor lever
Your PNG might be 3000 pixels wide. Your page might show it at 600. Color tricks cannot compete with a smaller size there.
Pixel count falls with the square of the scale. A 50 percent scale leaves a quarter of the data. That happens before any other compression. A mild scale cut plus a mild color cut usually beats pushing either one to the limit.
Need exact pixel sizes instead of a percent? The image resizer lets you type the width and height and lock the ratio.
PNG compressor tips that save the most space
- Crop empty borders first with the image cropper.
- Try 6 bits first. It is invisible on most graphics.
- Use 4 bits for simple icons and logos.
- Pick JPG or WEBP for photos instead of fighting PNG.
- Keep the original file in case you need full quality later.
Does a PNG compressor keep transparency?
Yes. This tool keeps the alpha channel through the whole process. A compressed logo still drops cleanly onto any background.
That is the main reason to stay with PNG. Does transparency not matter for your image? Then WEBP through the image compressor gives you tiny files. WEBP also supports transparency if you need it later.
Common PNG compressor problems
I see bands in a gradient
The color cut went too far for that image. Move the slider up one step. Gradients need more colors than flat art.
The file barely shrank
The image is likely a photo. Switch it to JPG or WEBP instead. You will save far more space.
Who uses a PNG compressor?
Web designers shrink logos and icons so pages load faster. Developers trim app assets to keep downloads small. Bloggers cut screenshots down before upload. Support teams send lighter screenshots in tickets. Each job keeps sharp edges and clear backgrounds while the file shrinks.
Your files stay on your device
The tool uploads nothing. Your browser decodes each PNG. It adjusts the colors and size in memory. Then it saves the new PNG inside this tab. Design files and internal screenshots never reach a server.
Have vector art? Export it at the right size with the SVG converter first. Then compress the PNG here.