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Social Media Checker

Check post length against all platform limits before you publish

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Platform limits

About this social media checker

This free social media character counter checks your post or caption against the limits of six major platforms simultaneously: Twitter / X, LinkedIn, Instagram, TikTok, Facebook, and YouTube. As you type, every platform updates in real time with a progress bar showing how close you are to each limit.

Stop writing a post, publishing it, and discovering it was cut off or rejected. Check before you post — it takes seconds and saves you from losing the end of your message or looking unprofessional.

Complete platform character limits

Twitter / X standard: 280 characters per tweet. Every character counts including spaces, punctuation, and emojis. URLs are automatically shortened to 23 characters regardless of their actual length.
Twitter / X Premium: 25,000 characters for paid X Premium subscribers.
LinkedIn posts: 3,000 characters maximum. Posts are truncated after 210 characters with a "see more" link on desktop, and after 140 characters on mobile.
LinkedIn comments: 700 characters maximum.
Instagram captions: 2,200 characters maximum. Only the first 125 characters are visible before the "more" link on most devices.
Instagram bio: 150 characters maximum.
TikTok captions: 2,200 characters maximum.
TikTok bio: 150 characters maximum.
Facebook posts: 63,206 characters — effectively unlimited for practical purposes.
Facebook comments: 8,000 characters maximum.
YouTube descriptions: 5,000 characters maximum. Only the first 157 characters appear in search results, so front-load your keywords.

Tips for optimal post length on each platform

Twitter / X: Posts under 100 characters get 17 percent more engagement on average. Lead with the most important information and cut anything that is not essential.
LinkedIn: Posts between 1,300 and 2,000 characters tend to get the most organic reach. Use short paragraphs and line breaks to improve readability on mobile.
Instagram: Front-load the first 125 characters with your hook or call to action since that is all that shows without tapping "more". Use hashtags at the end of your caption.
TikTok: Short captions under 150 characters perform well for most entertainment content. Longer captions work for educational content where context helps viewers understand the video.
Facebook: Posts with 40 to 80 characters get the highest engagement despite the generous limit. Pair short text with a strong image or video for maximum reach.
YouTube: Pack your most important keywords into the first 157 characters of your description since that is what appears in search results and suggested video previews.

Frequently asked questions

Do emojis count as one character?

It depends on the platform. On Twitter, most emojis count as 2 characters because they use Unicode code points outside the basic multilingual plane. On other platforms, emojis typically count as 1 or 2 characters depending on the specific emoji. This checker counts each emoji as its Unicode character length, which is the most accurate cross-platform estimate.

Does Twitter count URLs toward the character limit?

Yes, but Twitter automatically wraps all URLs into a t.co short link that counts as exactly 23 characters regardless of the original URL length. This checker counts your actual typed characters. When pasting a URL into a tweet, budget 23 characters for it rather than the full URL length.

Are these character limits up to date?

Platform limits are updated here as changes are announced. Social media platforms occasionally adjust their limits, so always verify against the platform's own documentation for the most current official limits before important posts or campaigns.

Can I check hashtags and mentions in my character count?

Yes. Paste your complete post including hashtags and mentions and this checker counts everything exactly as it appears. On Twitter, @mentions count toward your 280 characters. On Instagram, hashtags in captions count toward the 2,200 character limit.