Pallyy is a SaaS Solution for Social Media Management. Naturally they offer cool (and in this case – free) tools that will help every social media manager.
The X (Twitter) Thread Maker will allow you to create a thread from a long caption.
While using X itself it might be tricky to split a single long tweet into multiple threads. So, Pallyy offers a solution to that. You write your caption. The tool does the rest. Easy. Fast. Free.