X-Split
Turn long posts into perfect X threads instantly
What is X Split?
X-Split is a Chrome extension that automatically breaks long posts into clean, numbered threads for X/Twitter. It intelligently splits text at sentence boundaries, respects the 280-character limit, and handles URL counting according to X's t.co rules. Designed for anyone who frequently shares long-form content on X/Twitter, it requires zero setup—just install and start typing.
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Key Features of X Split
- Smart splitting at sentence boundaries
- Auto-split on input with live preview
- URL-aware counting (23 characters per URL)
- Per-chunk numbering (customizable format)
- Fill mode for maximum character usage
- Re-split without retyping
- Dark mode support
- Collapsible sidebar
- Customizable settings (max characters, numbering style, URL counting)
Who Should Use X Split?
Break long-form thoughts into X threads
Share extended content without losing readability
Format numbered threads for better engagement
Compose complex posts with automatic formatting
X Split: Pros & Cons
✓Pros
- Completely free with no subscription or hidden costs
- All processing happens locally in-browser with zero data collection
- Lightweight vanilla JavaScript with no dependencies
- Works seamlessly inside x.com without tab switching
- No account creation required
- Private and transparent with full privacy policy
- Intelligent sentence-boundary breaking for natural reading flow
- URL-aware counting matches X's t.co behavior exactly
Tool Details
- Pricing
- Free
- Languages
- English
- Category
- Twitter Tools
- Added
- Jul 2026
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