How to remove image style property from CKEDITOR

Posted: July 18, 2011 in Javascript

Add this code in ckeditor/config.js.
Which will convert style property height, width and float to height=””, width=”” and align=””.

CKEDITOR.on('instanceReady', function (ev) {		
// Ends self closing tags the HTML4 way, like <br>.
            $: function (element) {
                // Output dimensions of images as width and height
                if ( == 'img') {
                    var style =;

                    if (style) {
                        // Get the width from the style.
                        var match = /(?:^|\s)width\s*:\s*(\d+)px/i.exec(style),
                        width = match && match[1];

                        // Get the height from the style.
                        match = /(?:^|\s)height\s*:\s*(\d+)px/i.exec(style);
                        var height = match && match[1];
						// Get the float from the style.
                        match = /(?:^|\s)float\s*:\s*(\w+)/i.exec(style);
                        var float = match && match[1];
                        if (width) {
                   =^|\s)width\s*:\s*(\d+)px;?/i, '');
                            element.attributes.width = width;

                        if (height) {
                   =^|\s)height\s*:\s*(\d+)px;?/i, '');
                            element.attributes.height = height;
						 if (float) {
                   =^|\s)float\s*:\s*(\w+)/i, '');
                            element.attributes.align = float;

                if (!

                return element;
  1. lin says:

    thank you very much .
    it is help for me , but after I uploaded the image by ‘Image’ button
    the style still on the editor how do I remove it ?

    • vibhajadwani says:

      Are you checking image tag’s style? If yes try to debug all javascript code, 1st alert style and then height, width, float. If you are getting all variables right then it will work.

  2. Rob says:

    Everyone hitting this issue with CKEDITOR 4: Insert

    element.forEach = function(){}; element.writeChildrenHtml = function(){};

    those functions prevent writing the .width and .height attributes, instead if u did write on them they get deleted and the content gets written into the style attribute!!! I nearly freaked out on this 😉

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