Change TinyMce Editor's Height Dynamically
Answer : You can resize tinymce with the resizeTo theme method: editorinstance.theme.resizeTo (width, height); The width and height set the new size of the editing area - I have not found a way to deduce the extra size of the editor instance, so you might want to do something like this: editorinstance.theme.resizeTo (new_width - 2, new_height - 32); Try: tinyMCE.init({ mode : "exact", elements : "elm1", .... To change size dynamically in your javascript code: var resizeHeight = 350; var resizeWidth = 450; tinyMCE.DOM.setStyle(tinyMCE.DOM.get("elm1" + '_ifr'), 'height', resizeHeight + 'px'); tinyMCE.DOM.setStyle(tinyMCE.DOM.get("elm1" + '_ifr'), 'width', resizeWidth + 'px'); The following comes in from this other SO answer I posted: None of the above were working for me in TinyMCE v4, so my solution was to calculate the height based on the toolbars/...