TinyMCE: Insert Text as Plain Text without any Formatting

TinyMCE is providing a plugin called "paste" that can care about this thing. The property "paste_as_text" should be set to "true".

Here is an example of how to include the plugin:

tinymce.init({
  selector: "textarea",
  plugins: "paste",
  paste_as_text: true
});

In your case, also using "paste_word_valid_elements" instead of "paste_as_text" could be helpful. You can use it like that:

tinymce.init({
  selector: "textarea",
  plugins: "paste",
  paste_word_valid_elements: "h1,h2,h3,b,strong,i,em"
});

With this property, you can define some HTML tags that are allowed to be taken over from Word (or any other source). All other elements not defined here are removed automatically. So, it is possible, for example, to take over headings or bold words but not every formatting.
2014-05-06 at 17:23