Online Bulk Image Compression Tool

This tool is used for bulk online compression of PNG images/JPG images/JPEG images/other common format images. Tool advantages: 1. Can upload 20 images at a time for bulk compression. Once compressed, all can be downloaded at once, or downloaded individually. 2. You can freely set the compression quality, finding the optimal balance of quality and size according to your needs. 3. The image size, compression rate, etc., before and after compression are clear at a glance, making it more convenient to meet different compression needs. You can click on the images before and after compression for a large preview to see if the compression effect is achieved while ensuring quality. 4. Compression is executed locally using your browser's API without any server interaction, ensuring the security of your private information. 5. We compress PNG images by combining color quantization, Alpha channel optimization, filter optimization, and DEFLATE compression. Although some steps may lead to some information loss (such as color quantization), compression is lossless in most cases and does not alter the visual effect of the image. Its flexibility and efficiency make it an ideal choice for PNG image processing in web development. 6. Different compression mechanisms are used for PNG format and other formats. 7. We compress without changing the original image format, using the same format as the original image for output. If you have more specific image compression needs, such as direct preview and comparison of images, fine-tuning compression quality, you can use the single image compression tool on this site. If you find our tool helpful, don't forget to bookmark and share it~This tool does not upload or save your images to the server, all image processing is done in your browser.