Reduce image file size for web optimization and storage savings
Drag & drop or click to upload image
Supported formats: JPG, PNG, WebP (max 20MB)Compress images for faster page loading
Reduce file size to meet attachment limits
Optimize for Instagram, Facebook platforms
Save cloud or device storage space
Image compression is a technique that reduces file size by removing redundant or unnecessary information from image data. JPEG compression works by reducing color information that the human eye is less sensitive to, and the compression intensity can be adjusted according to the quality setting. Since it is processed directly in the browser, images are not sent to external servers.
JPEG compression is a lossy compression method, so higher compression rates cause some quality degradation. However, setting the quality to 80% or above results in differences that are difficult to distinguish with the naked eye, which is sufficient for web use. It is always recommended to keep the original image stored separately.
JPG, PNG, and WebP format images can be uploaded, and compressed results are saved in JPG format. For PNG images, the transparent background is converted to white, so use another tool for images that require transparency. File sizes up to 20MB are supported.
The maximum uploadable file size is 20MB. This limit is set considering the stable size that can be processed in browser memory. For images exceeding 20MB, first reduce the size by another method before uploading, or use an image editing program.
Image file sizes on websites directly affect page loading speed. According to Google's Core Web Vitals metrics, page loading speed is an important factor for both SEO rankings and user experience. Properly compressing images can improve page speed and reduce data usage.
Lossy compression (JPEG) achieves higher compression ratios by discarding some image data, but the original cannot be restored. Lossless compression (PNG), on the other hand, reduces file size while preserving all data, so there is no quality degradation. JPEG is suitable for photos and complex images, while PNG is appropriate for graphics with sharp edges like logos and icons.
For web use, a quality level of 75-85% is ideal for balancing file size and image quality. Thumbnails and preview images can be reduced to 60-70%, while high-quality photo prints should maintain 90% or higher. Use the quality slider in this tool to compare original and compressed results to find the optimal value.