I found this great website that helps you instantly create temporary image placeholders for your development websites. Here’s the default example of the temporary image:
I create this image by making the image source (src=)
“https://dummyimage.com/480×108”.
The website automatically creates the temporary image with the number. Just looking at their home page, I found that you can also change the background color, text color and replace the dimensions with text. Here’s an example:
The source for this image is:
https://dummyimage.com/470×115/0F6983/fff&text=Temporary+Image+Text
I highly recommend checking out their Dummy Image Website.