Compress PNG Files Free

Lower the number of colors. Add your PNG, keep the preset of 256 colors and press Compress Image. The picture is rebuilt from a palette of up to 256 colors and saved as an 8-bit PNG, which is usually much smaller than a full-color one.

Yes. Set Colors to All and the PNG stays lossless, so every pixel matches the original. The savings are small that way. At 256 colors most graphics look the same to the eye, and the file shrinks much more.

They set the most colors the compressed PNG can use. The tool builds a palette that fits your image and blends it with dithering. Fewer colors make a smaller file, but smooth gradients may show banding at 64 or 32.

Yes. The palette PNG stores a transparency level for each color, so shadows, glows and smoothed edges stay partly see-through. That matters for logos and cutouts placed on colored backgrounds, where a hard edge would look jagged.

PNG saves every pixel exactly, with up to millions of colors and a transparency channel. That suits sharp graphics but makes photos heavy. Cutting the palette to 256 colors or fewer removes much of that weight while keeping edges crisp.

Big PNGs with many colors shrink the most, like photos, cutouts and full-page screenshots. In our tests, a plant cutout dropped 76% at 256 colors and a 3.76 MB screenshot dropped 51%. Small, already optimized graphics may barely change, so check the percent saved.

For photos, often yes. Pick WebP to keep transparency at a smaller size, or JPEG for the widest support. JPEG has no transparency, so clear areas are filled with a background color, white by default. Keep PNG for logos, icons and text.

Tap the 100 KB button or type 100 in the target size box, then compress. The tool makes up to 8 tries to fit the limit, then scales the image down if it has to. If it still can't fit, it shows the smallest size reached.

No, not by default. Resize starts at None, so the dimensions stay the same. Choose Max edge to cap the longest side, 1920 px unless you change it, or Percent to scale down. A KB target that colors alone can't meet also shrinks the image.

Yes. It is a standard 8-bit indexed PNG that browsers, design apps and image viewers open like any other. Only the way the colors are stored changes. You can open it, edit it and save it again as usual.

The image needs more colors than you allowed. Grain comes from dithering, which mixes palette colors to fake smooth shades, and banding shows when a gradient runs short of colors. Switch to 256 colors, or All for a lossless file, and compress again.

Yes. Your PNGs are compressed on your own device and never sent anywhere. There is no sign-up, no watermark and no daily cap. Each file can be up to 50 MB, and you can add as many as your device's memory can handle.