Optimize PNG without uploading your file

Optimize a PNG in your browser when you need the same file format but a smaller download.

The optimization runs entirely in your browser. The file never leaves your computer. No signup, no upload, no tracking.

This tool keeps the output as PNG. It is useful for screenshots, diagrams, UI exports, and images that need transparency. If you are working with photos and do not need transparency, converting to JPG or WebP will usually make a much smaller file.

When to keep PNG

Keep PNG when sharp edges, text, flat colors, or transparent backgrounds matter. PNG compression is lossless, so savings are smaller than lossy formats, but recompressing can still remove unnecessary bytes from design exports and screenshots.