Upload a PNG, pick a compression level, download a smaller file. No signup, no watermark — just a smaller PNG.
Upload your PNG file using the tool above, select a compression level, and click Compress PNG. The file is processed on our server using sharp — a high-performance Node.js image library — and you get a download link immediately. No email required, no account, no watermark.
Low (lossless): Uses maximum zlib deflate compression and adaptive filtering. The pixel data is unchanged — only the encoding is more efficient. Use this for logos, icons, screenshots, and anything where you need pixel-perfect output.
Medium (128-color palette): Quantizes the image to 128 colors using palette compression. Visible quality is usually excellent for most photos and graphics; file size drops significantly. Good default for most use cases.
High (64-color palette): Reduces to 64 colors. Maximum file size reduction — often 60–80% smaller than the original. Best for images with limited color ranges (flat design, illustrations, charts). Not recommended for detailed photography.
PNG supports transparency (alpha channel) — JPG does not. If your image has a transparent background (logo on a website, UI asset, icon), you must keep it as PNG. Compressing the PNG preserves the transparency while reducing weight. Converting to JPG would destroy the alpha channel and add JPEG compression artifacts.
Lossless compression typically reduces PNGs by 10–25%, depending on how well-optimized the original was. Palette quantization (medium/high levels) can reduce file size by 50–80% for images that don't require the full 24-bit color range. Results vary by image content.