Online Tool Store
Thread Composer
Write a long-form thread and have it automatically split into numbered posts that fit your platform's character limit. Runs entirely in your browser.
🔒 This tool runs entirely in your browser. Your files are never uploaded to a server.
Example shown — write your own thread, one paragraph per idea.
How it works
- Write your thread, one idea per paragraph.
- Choose your platform's character limit.
- Each post is auto-numbered ("1/6") and ready to copy individually or all at once.
FAQ
How does it decide where to split?
It splits on paragraph breaks first — write one idea per paragraph and each becomes its own post. If a single paragraph is still too long, it falls back to splitting on sentence boundaries.
Why does the character count include the post number?
Each post gets a "1/6"-style number appended, and that counts toward the platform's character limit too — the tool reserves space for it automatically.
Can I copy the whole thread at once?
Yes — "Copy all posts" copies every post, separated by a divider, so you can paste and split them into your platform's composer.
Is my text uploaded anywhere?
No — splitting happens entirely in your browser as you type.
How we compare
| Feature | Online Tool Store | Writing directly in the platform composer | Manual splitting |
|---|---|---|---|
| See the whole thread before posting | ✓ | ✗ | ✓ |
| Automatic numbering and length checks | ✓ | ✗ | ✗ |
Writing directly in a platform's composer means splitting posts on the fly and losing sight of the full thread. Thread Composer lets you draft and check the whole thing first.