The main problem with the base64 image example is that it is not valid HTML.
<img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg==" alt="Red dot" />
This code line is an HTML tag that displays an image. The image is a red dot.
Base64 Image Encoder
The Base64 Image Encoder is a utility that can be used to encode an image into a base64 format. This format can then be used to store the image on a web page or sent over email.
What is Base64
Base64 is a encoding format used to represent binary data as text. It is used in HTML to encode binary data into a format that can be understood by the browser.