Social Media Character Counter

Platform Character Limits at a Glance

• Twitter / X: 280 characters (hard limit). Go over and you cannot post. For maximum engagement, studies show tweets between 71–100 characters receive the most retweets.
• LinkedIn: 3,000 characters for posts. The “see more” truncation kicks in after ~210 characters on desktop and ~140 on mobile — front-load your key message. For maximum organic reach, research suggests 1,900–2,000 characters performs best.
• Instagram: 2,200 characters for captions. Captions are truncated after the first few lines in the feed — the hook must work immediately. Studies show captions at 138–150 characters drive the highest engagement rates.
• Facebook: Technical limit is 63,206 characters, but for maximum reach and engagement keep posts under 80 characters. Short, punchy posts consistently outperform long-form content on Facebook's algorithm.

Why Character Count Matters

Every platform has both a hard character limit and an optimal engagement range — and they're rarely the same number. Staying within the limit is the floor; optimising for the engagement sweet spot is the ceiling. Posts that ignore these nuances often receive a fraction of the reach they could achieve.

On Twitter/X, going right up to the 280-character limit is rarely optimal — shorter, sharper tweets tend to get more replies and retweets. On LinkedIn, longer posts that provide genuine value are rewarded by the algorithm, but only if they hook the reader in the first two lines before the “see more” break. On Instagram, the visual does most of the work; the caption adds context and drives comments, but rarely benefits from being exhaustive.

Use this tool to draft and refine posts before scheduling. Check your character count across all four platforms when you are cross-posting the same content — a post optimised for LinkedIn often needs significant editing before it works on Twitter/X.