You can write an Invisible Secret Text Message in an Image File, by following this trick laid down in this post. All you need is the Notepad!

How to write text descriptions when text is burned into the image and can’t be read by screen readers or braille displays. Part of:How to write text descriptions (alt text) in BBC News articles ...

Alt-text descriptions make images accessible for blind users and others who use screen readers. But you shouldn't just write whatever you want. Here are some tips.

How to write text descriptions when text is burned into the image and can’t be read by screen readers or braille displays.