Why LinkedIn Post Preview Matters
LinkedIn's algorithm heavily rewards posts that generate early engagement — likes and comments in the first 60-90 minutes after posting signal the algorithm to expand distribution. But engagement starts with the first impression: your opening line, structure, and character count determine whether LinkedIn shows a truncated post requiring a "see more" click, which reduces engagement rate by 20-40%. Previewing before posting lets you optimize the hook, verify hashtag count, and confirm your post structure before it goes live to your network.
LinkedIn Algorithm Optimization
LinkedIn's algorithm currently favors: posts between 1,300-1,900 characters (enough for depth, not so long they get truncated), 3-5 hashtags (more dilutes reach), text-first posts over link-in-post content (LinkedIn suppresses external links in feed), line breaks and white space for mobile readability, and engagement-triggering endings (questions, polls, strong opinions). The LinkedIn Post Preview shows your character count, hashtag count, and read time instantly, plus warns you when you're approaching the truncation threshold.
The "See More" Truncation Point
LinkedIn truncates posts at approximately 1,300 characters on desktop and 700 characters on mobile, adding a "see more" link. Posts that require this click to read fully see dramatically lower total reach because many users don't click through. Your first 2-3 lines — visible before truncation — must hook readers compellingly enough to earn that click. Use the preview to verify your hook appears in full on initial load, and save your most compelling insight or question for those opening lines.
LinkedIn Image Specifications
LinkedIn link preview images must be at least 1200×627px (1.91:1 aspect ratio) for the best display. Square images display at 1200×1200px. Portrait images are cropped. The preview tool simulates how your link preview card will appear below your post text — enter the image URL and link title to verify appearance before posting. Broken or incorrectly sized preview images are a common reason LinkedIn posts underperform despite good text content.