Also check out how to optimize images for SEO: How to optimize images for SEO?

[mstakh.i.mo.mi]

1. Scaling images before uploading
Scaling images means resizing them to the actual dimensions they appear on the page. Many people upload high-resolution images (e.g. 4000x3000 pixels) that appear much smaller.

How to do it?

Before uploading images, use tools like Photoshop , GIMP , or free online editors like TinyPNG or ILoveIMG .
Set a maximum size for images on chinese overseas canada database your site. For example, 1200x800 pixels is enough for headers, and 300x200 pixels for thumbnails.
2. Compress images manually
Compressing images can significantly reduce file size while maintaining acceptable quality.

Available tools:

TinyPNG and Compressor.io – compress images lossily and losslessly .
Squoosh – a free tool from Google that allows you to manually control the quality and format of an image.
Example.