About Tweet Engine

Tweet Engine is a small, independent site built around one tool: a thread splitter for X. You paste a long piece of text and it breaks it into a numbered series of posts, each within X's 280-character limit, ready to copy into the composer one at a time.

The five guides cover the parts a tool can't decide for you: how to write a thread people read to the end, which structures work, how to turn a blog post into a thread, when a single long post is the better choice, and how to edit a thread before it goes out.

How the splitter works

Each post is measured with the weighted count X uses. Text is normalized to Unicode NFC, characters in the Latin and common punctuation ranges count 1, other characters (including Chinese, Japanese and Korean) count 2, each emoji counts 2, and each link counts 23.

The splitter packs whole paragraphs into a post while they fit. When a paragraph would only partly fit, it starts a fresh post rather than splitting the paragraph across the break, unless the current post is less than half full. Paragraphs longer than one post are split between sentences, with common abbreviations like "e.g." and "Dr." ignored as sentence ends. A single sentence longer than a post is broken at a space. Words are never cut in half, apart from the rare case of one unbroken string longer than an entire post.

Before splitting, it reserves room on every post for the numbering label you chose, so "1/n" counters and "🧵 1." prefixes never push a post over the limit. After the split, you can edit any post, merge it with the next one, or split it at the cursor, and each card shows its count and a warning when a post is over the limit or very short.

What it saves

The splitter runs in your browser and doesn't send your text anywhere. It saves your draft and settings in your browser's local storage so a reload doesn't lose your work. Nothing reaches us. Clear removes the saved copy.

What it can't do

It doesn't post to X, schedule threads or connect to your account. It can't tell you whether the thread is any good. That part is up to you, and the guides try to help with it.

Who writes it

Tweet Engine is written and maintained by the Tweet Engine Team, a small group of editors and developers who have turned more articles into threads than we'd like to count. We don't sell followers or engagement, we don't take payment for mentions, and there are no ads.

Not affiliated with X

Tweet Engine is not affiliated with, endorsed by or connected to X Corp. X and Twitter are trademarks of their owner and are used here only to describe what the tool is for.

History of the domain

Tweetengine.net was relaunched in 2026 under new, independent management. The current site has no connection to earlier owners of the domain, and pages from earlier versions of the site are not part of it.

Feedback

If the splitter breaks something in an odd place, please send us the text that caused it. That's the fastest way for us to fix it.