IconVault's Compress PNG shrinks PNG files with median-cut color quantization: you choose how many colors to keep (256, 128, 64, 32 or 16), and the tool rebuilds the image with an optimized palette. Fewer colors means a smaller file, and it works best on logos, icons and graphics with flat colors. Process up to 50 images at once, each with its own download button plus a combined ZIP.

It is free to use and private by design: everything runs locally in your browser, so your files never leave your device. Pro members get unlimited compressions and can batch entire asset folders without hitting the trial cap.