Is compressing a PNG free?

Yes, completely free with no file limits beyond the upload size cap.

Does compression keep transparency?

Yes, alpha transparency is preserved through the palette-based compression.

Why does my compressed PNG look different?

PNG compression here reduces the color palette to shrink the file, which can be visible as slight banding on images with smooth color gradients. Icons and flat-color graphics compress with little visible difference.

PNG Compressor

Reduce PNG file size online, free, using lossy palette quantization while keeping transparency.

PNG compression here uses color palette reduction (lossy): it keeps transparency but reduces the number of distinct colors, which can show as banding on photo-like images with smooth gradients.

Drag and drop a file, or click to choose one

Accepted: PNG

PNG

How to Convert PNG Compressor

1
Click "Choose file" and select the PNG image you want to compress.
2
Adjust the quality slider to control the size/quality tradeoff.
3
Click "Convert to PNG" to compress, then download the result.

What is a PNG file?

A raster-based format that compresses images losslessly by default. PNG supports RGB and RGBA color and transparency, making it well suited to graphics and icons.

Developed by: PNG Development Group
Initial release: October 1996

Frequently Asked Questions

Image Compressor JPEG Compressor