Hey Product Hunt! 👋 I'm the maker of ThreadSplit. As someone who loves sharing thoughts on X and Threads, I was constantly frustrated by manual character limit constraints. It was incredibly tedious, and I kept accidentally breaking my sentences or URLs right in the middle just to fit the limit. And don't get me started on the struggles of CJK (Chinese/Japanese/Korean) character counting! I built ThreadSplit purely to solve my own headache. You just paste your entire draft into the app, and its smart algorithm auto-slices it into perfect, ready-to-post segments. It respects your sentence boundaries, protects long URLs, and perfectly calculates tight limits across all major text-based platforms (X, Threads, Bluesky, Mastodon). Best of all, it’s 100% on-device for total privacy. I built this for myself, but I hope it saves formatting time for you creators too. I'd love to hear your feedback, feature requests, or any questions you have. I'll be hanging out in the comments all day! Cheers! 🚀

ThreadSplit

Auto-split long texts into perfect social threads,X, Bluesky

Auto-split long texts into perfect social threads,X, Bluesky