How to make a roblox custom tween library script

If you're looking to step up your game's polish, writing a roblox custom tween library script is one of those projects that sounds intimidating but pays off massively in the long run. Most developers start out using the built-in TweenService, and honestly, for 90% of tasks, it works just fine. It's reliable, it's built-in, and it's easy to understand. But as your project grows, you might start noticing that TweenService feels a bit like a "black box." You can't easily see what's happening under the hood, and if you're trying to animate five hundred UI elements or projectiles simultaneously, you might start seeing some performance hitches that are hard to debug. ...

February 20, 2026 · 7 min · Kailey Cheree