Edit for iOS 11+ only Use WKHTTPCookieStore: let cookie = HTTPCookie(properties: [ .domain: "example.com", .path: "/", .name: "MyCookieName", .value: "MyCookieValue", .secure: "TRUE", .expires: NSDate(timeIntervalSinceNow: 31556926) ])! webView.configuration.websiteDataStore.httpCookieStore.setCookie(cookie) Since you are pulling them over from HTTPCookeStorage, you can do this: let cookies = HTTP
![Can I set the cookies to be used by a WKWebView?](https://cdn-ak-scissors.b.st-hatena.com/image/square/98d6f053a97a87156775f60757c60865d0f2c47d/height=288;version=1;width=512/https%3A%2F%2Fcdn.sstatic.net%2FSites%2Fstackoverflow%2FImg%2Fapple-touch-icon%402.png%3Fv%3D73d79a89bded)