If you use Drip for email marketing automation, you might have experience with their “?dst” url parameter. If you don’t, it’s basically a way for you to add instructions to Drip in your URL to apply a tag to someone if they end up opting in.
It’s an incredibly useful way to track lead sources, without having to create totally separate opt-in forms and landing pages for each source.
However, the tricky bit with these DST codes is that you have to remember to encode special characters, including spaces — and make sure to do it correctly — or else it won’t work.
So I made a nifty tool for you to quickly generate these URLs for yourself, should you need to.