JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
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If you are copy-pasting an image from a word document, that will not work in the form builder's WYSIWYG text editor, because it requires the link to the image to be uploaded somewhere.
The WYSIWYG editor will only copy-paste if the image is a link from a webpage. This is because the editor actually creates basic HTML codes from while a person is typing in the editor canvas. It does not have the capacity to embed an image unlike the capacity that the word document can do.
Hope this gives some clarification to your concern.
If you need further clarification or if you have questions, please let us know.