Caption Checker
Check your social media caption against platform limits for X, Instagram, TikTok, LinkedIn, and more.
About the Caption Checker
Every social media platform has different character limits and best practices for captions. X (Twitter) allows 280 characters, Instagram captions can be up to 2200 characters (but only the first 125 show without 'more'), TikTok captions support 2200 characters, LinkedIn posts have a 3000-character limit, and YouTube descriptions allow up to 5000 characters. This caption checker validates your text against all major platforms simultaneously, counts hashtags and mentions, and warns you when you're approaching or exceeding each limit — so you can write once and post everywhere without manual checking.
Common use cases
- Validate captions for X, Instagram, TikTok before posting
- Count hashtags to stay within Instagram's 30-hashtag limit
- Optimize caption length for each platform's best practices
- Write one caption that works across all social channels
- Check bio character limits for Instagram (150) and X (160)
Why client-side?
Every byte you paste, type, or upload here is processed entirely inside your browser. Nothing is sent to a server, logged, or stored. That means it's safe to use this tool on production secrets, customer data, internal logs, and any input you would not paste into a hosted SaaS formatter.
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Frequently Asked Questions
- What is the character limit for X (Twitter) in 2026?
- X (Twitter) allows 280 characters per post. Links count as 23 characters regardless of actual length. This checker accounts for X's specific counting rules.
- How long can Instagram captions be?
- Instagram captions can be up to 2200 characters, but only the first 125 characters appear before the 'more' cutoff. For best engagement, keep captions concise or front-load key information.
- What is the TikTok caption limit?
- TikTok allows up to 2200 characters in captions. However, shorter captions (100-150 characters) tend to perform better for retention and watch-through rates.
- How many hashtags should I use on Instagram?
- Instagram allows up to 30 hashtags, but data shows 5-10 relevant hashtags get the best engagement. Too many hashtags can look spammy and hurt reach.