Suppress WKWebView from scaling content to render at same magnification as UIWebView does

I had the same problem. I just had to put

<meta name="viewport" content="initial-scale=1.0" />

into my header block and that solved it for me. Looks like WKWebView behaves more like Mobile Safari than a UIWebView does, so you need to set the viewport if you want to control scaling or general sizing.