Low tech, low effort ways your can protect your art images:
Disable right-click options on images. By disabling right clicks on images you are creating a barrier to immediate image access.
Each HTML website should allow you to restrict right clicks on images. For some websites, you are able to easily disable right-clicking by using a plugin widget. This method is a barrier to theft since motivated people with a basic knowledge of HTML will be able to bypass a disabled right-click. method of protection.
Include contact and image permission information on your website. The simplest way to discourage unwanted image use is to give viewers a way to contact you about how to use and credit your art images.
Upload low-resolution images of your art. Having low-resolution images will make printing artwork difficult as its quality will be poor. For online viewing, a low-resolution file will still look good to a viewer but a low-resolution file will make reproduction difficult.
More involved ways to protect your art images online:
Copyright your art images. Copywriting images will not make them more difficult to steal but it will make going after misused images easier. Depending on where in the world you live, you may need legal consultation to obtain copyright documentation.
Add a watermark to art images. Watermarking images dissuades image theft and use. However, adding a watermark also degrades the viewing experience for clients and other people online looking at your artwork.