LinkedIn Carousel Specs & Best Practices: The Complete 2026 Guide
July 18, 2026 7 min read By Dilip Singh Sisodiya
Carousels (PDF documents) are statistically the highest-engagement organic format on LinkedIn. Because users swipe through slide by slide, they generate immense dwell time—the single most important algorithmic ranking signal on LinkedIn.
Key Technical Specifications for LinkedIn Carousels
- File Format: PDF (Portable Document Format)
- Ideal Dimensions: 1080 × 1350 px (4:5 portrait) or 1080 × 1080 px (1:1 square)
- File Size Limit: Up to 100 MB or 300 pages (5 to 10 slides is optimal)
- Font Legibility: Use a minimum of 28pt bold typography for key headings so mobile readers can scan comfortably
The Proven 7-Slide Anatomy
- Slide 1 (The Hook): Bold claim or painful problem with high contrast visuals.
- Slide 2 (The Agitation): Why traditional solutions fail.
- Slide 3–5 (The Framework): 3 actionable steps with bite-sized tips.
- Slide 6 (Summary / Cheat Sheet): The complete blueprint in one slide (great for saves and downloads).
- Slide 7 (The CTA): Direct prompt to follow, comment, or repost.
Native Carousel Scheduling with PostNexus AI
Until recently, scheduling LinkedIn document carousels was a nightmare requiring manual desktop publishing. With PostNexus AI, you can upload your PDF document directly into our composer and schedule your carousel in advance alongside your X threads and Instagram posts.