Game Sprite AI's Image Compressor is a free online tool that reduces image file size with adjustable compression quality. Support for PNG, JPEG, and WebP formats gives you the flexibility to choose the best compression method for your image type.
PNG: Lossy compression via color quantization. Reduces the number of unique colors in the image, which significantly decreases file size while preserving the PNG format and transparency. Best for pixel art, icons, and graphics with limited color palettes.
JPEG: Lossy compression with adjustable quality from 10% to 100%. Best for photographs and images with smooth color gradients. JPEG does not support transparency — transparent areas will be filled with a background color.
WebP: Lossy compression with adjustable quality. WebP typically achieves 25-35% smaller file sizes than JPEG at equivalent quality levels, and it supports transparency. Best for web optimization.
1. Upload your image (PNG, JPG, WebP, or GIF) by clicking the upload area or dragging a file.
2. Select output format: auto (recommended), PNG, JPEG, or WebP.
3. Adjust the quality slider from 10% to 100%. The compressed file size updates in real-time.
4. Preview the compressed image and check the savings percentage.
5. Download the compressed image.
When you select "Auto" format, the tool detects whether your image has transparency. Transparent images are compressed as WebP to preserve alpha channel while achieving maximum compression. Non-transparent images are compressed as JPEG for optimal photo compression.
Like all Game Sprite AI tools, the Image Compressor runs entirely in your browser. No uploads, no server processing, no login required. Your image data never leaves your device.