Every social platform has different character limits, engagement sweet spots, and best practices. Type your post and select a platform to get an engagement score, character count breakdown, and preview of how your content will appear. Results update live as you type.
Pro tip: Optimal post length is usually shorter than the platform maximum. LinkedIn posts perform best at 1,200–1,500 characters — not the 3,000 limit.
See platform-optimized versions of your post, automatically tailored for each network.
Enter an alternate version to compare scores side by side.
How to Use the Social Media Optimizer
Write or paste your post into the text area and select the platform you’re targeting. The tool scores your post based on platform-specific best practices and provides factor-by-factor feedback. Check the compatibility matrix to see how your post works across all major platforms at a glance, and use the preview to see exactly how your content will appear in users’ feeds.
Optimal Post Lengths by Platform
Each platform has a maximum character limit, but optimal engagement often comes from posts that are shorter than the limit. Twitter/X performs best at 71–100 characters. LinkedIn posts get the most engagement at 1,200–1,500 characters — long enough to provide value, but not so long that readers abandon midway. Instagram captions work best at 138–150 characters for feed posts, though carousels can go longer.
The Hook-Value-CTA Framework
High-performing social posts follow a three-part structure: a strong hook in the first line that stops the scroll, a value section that delivers on the hook’s promise, and a call to action that tells readers what to do next. This framework works across all platforms and content types.
Hashtag Best Practices
Hashtag effectiveness varies dramatically by platform. Instagram allows up to 30 but 3–5 targeted hashtags now outperform hashtag-heavy posts. LinkedIn benefits from 3–5 relevant hashtags. Twitter/X posts perform best with 1–2 hashtags. Facebook hashtags have minimal impact on reach but can help with searchability.
Emoji Strategy for Social Media
Posts with emojis receive 25% higher engagement on average across platforms. The key is using 1–3 relevant emojis to break up text and add visual interest. Overusing emojis (more than 4) decreases engagement and can make content appear unprofessional on platforms like LinkedIn. Use emojis as bullet points or visual anchors, not as word replacements.
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