LinkedIn Carousel Dimensions, Specs & Best Practices for 2026
LinkedIn carousels (technically "document posts") are the format with the highest save rate on the platform in 2026. The catch: LinkedIn ships file specs that aren't documented in one place, and getting any of them wrong silently degrades how your post renders. This is the cheat sheet.
Exact LinkedIn carousel dimensions
LinkedIn renders PDFs at any aspect ratio, but only three look good in the mobile feed: 1:1 (square, 1080×1080), 4:5 (portrait, 1080×1350), and 16:9 (landscape, 1920×1080). Portrait wins on save rate because it occupies the most vertical screen real estate as the user scrolls past.
Resolution: 1080px on the long edge minimum. Going higher doesn't hurt; going lower produces visible JPEG artifacts on retina displays.
Slide count: the 10–12 sweet spot
LinkedIn's algorithm rewards dwell time, and a 10–12 slide carousel takes the median reader 35–55 seconds to swipe through — a strong dwell signal. Under 6 slides reads as a deck that wasn't worth the format. Over 14 sees attrition before the closing CTA.
Structure: slide 1 hook, slide 2 promise/agitate, slides 3–9 body, slide 10 summary, slide 11 CTA, slide 12 brand. Adjust to taste — but keep the closing CTA on its own dedicated slide.
File format & size limits
Upload as PDF. LinkedIn accepts PPT and DOC too but PDFs render the most predictably across iOS, Android, and web. Maximum file size is 100 MB but you want to stay under 10 MB so the post loads instantly on slow mobile connections.
Fonts: embed them in the PDF. Non-embedded fonts get substituted with Times New Roman on rendering, which is a uniquely cruel way to destroy a carefully designed deck.
Typography and contrast
Mobile is the only screen size that matters. Test every slide at 375px wide before publishing. Body text should be at least 28pt at 1080px; hooks should be 56pt+. Anything smaller becomes illegible on a thumb-scrolled feed.
Contrast ratio of 7:1 minimum on body text. That eliminates the gray-on-gray aesthetic that wrecks accessibility and reach.
Frequently asked
What is the best LinkedIn carousel size?+
1080×1350 (4:5 portrait). It fills the most vertical space in the mobile feed without LinkedIn cropping the top or bottom.
How many slides should a LinkedIn carousel have?+
10–12 slides is the sweet spot for save rate and dwell time. Fewer than 6 underperforms; more than 14 sees swipe attrition before the CTA.
PDF or images for LinkedIn carousels?+
PDF, always. LinkedIn renders PDFs as native swipeable document posts. Image carousels exist but get half the reach of a PDF on the same content.
What is the maximum file size for a LinkedIn carousel?+
LinkedIn accepts up to 100 MB but you want to stay under 10 MB so the post loads instantly on mobile data. Compress images, embed fonts, flatten layers.
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