Hi Shopify Community 
When working with merchants on promotions, we often create links for social campaigns that directly add products to the cart so customers can check out with as little friction as possible.
We use Shopify’s Cart Permalinks API, which is powerful, but manually building those URLs (with variants, quantities, attributes, notes, etc.) can get tedious and error-prone. I kept running into this, so I built a small free tool to make it easier: Shopify Cart Permalink Generator.
It’s 100% web-based and lets you visually fill in all the available parameters to generate a ready-to-share link in seconds.
If you find yourself working with cart permalinks, I’d love for you to try it and share any feedback 