Image files often contain metadata, such as EXIF data, which includes information about the camera, exposure settings, and more. While this information can be useful, it adds to the overall file size. Removing or minimizing metadata can help reduce the image's size further. Image editing software or online tools often provide options to strip or minimize metadata during the compression process.
Several dedicated image compression tools and online services are available that employ advanced algorithms to achieve optimal compression while preserving image quality. These tools analyze the image and apply specific techniques to reduce file size. Some popular options include TinyPNG, JPEGmini, and Squoosh. These tools are user-friendly and often provide a preview of the compressed image before saving.