There are several methods to reduce image file sizes:
Use image compression tools like TinyPNG or JPEGmini to reduce file size without significant loss in quality. Choose the right file format: Use JPEG for photographs and complex images, and PNG for images that require transparency. Resize images to the dimensions you need before uploading them. Most email templates don’t require images wider than 600px. Reduce image resolution to 72 DPI (Dots Per Inch), which is sufficient for most screens.