I found 𝐚 powerful 𝐒𝐤𝐞𝐭𝐜𝐡 𝐭𝐨 𝐑𝐞𝐚𝐜𝐭 tool​​

I found a free tool that allows Sketch to Responsive Webpage 10x Faster. You probably think it is clickbait, just try it before you doubt about it.​ It's called pxCode.