Here are some tools I've made that will help you with web design. I made them mainly for myself since I use them constantly, and I just decided to share them with you.
Get your SCSS complied to vanilla CSS with this tool. It can minify, copy into your clipboard, and it will automatically compile when you paste into the source field. It's pretty nifty.
Get live previews of your typestting before you commit to it in your designs. You can edit the coefficient, and you can even use Google fonts and try custom CSS to preview.