Here you go. Example in my portfolio below…
Can’t remember where I found this but it took some digging around when I wanted to know the same thing a couple years ago. I add it to all my builds along with “fastclick.js” to get rid of click delays on browsers - both add a nice little final polish.
The current settings add just a subtle little “hi-jacking” of the default janky/jumpy scrolling behavior of most browsers. Just a touch of smoothness and a tiny bit of overscroll on a quick mouse wheel movement, if you want a different feel then play around with the settings at the top of the script. You can fine tune it quite a bit…
Webflow doesn’t allow you to upload js files so you’ll need to host it elsewhere…
Then just add it as an include in the footer code of your site.
<script type="text/javascript" src="https://yourhostingservice/smoothscroll.js"></script>
