Word and Character Limits for Every Social Media Platform (2026)

Every platform enforces a hard character limit, but the number that actually matters for engagement is usually much smaller — the point where the app truncates your text behind a "...more" link. Write past that point and most readers never see the rest.

Caption and post limits by platform

• Instagram: 2,200 character hard limit on captions, but only the first ~125 characters show before "more" — put your hook there.
• X (Twitter): 280 characters for a standard post; longer posts are available to subscribers but still perform best kept short.
• Facebook: no hard limit on post length, but posts under ~80 characters get noticeably higher engagement than long-form ones.
• LinkedIn: 3,000 character limit, truncated after roughly the first 210 characters (about 3 lines) before "see more".
• TikTok: 2,200 characters for captions, though most viewers only see the first line or two on the feed.
• Threads: 500 character limit per post — Threads is intentionally shorter-form than Instagram captions.

Bio and name-field limits

• Instagram bio: 150 characters.
• X bio: 160 characters.
• LinkedIn headline: 220 characters; About section: 2,600 characters.
• TikTok bio: 80 characters.
• Facebook Page 'About' short description: 255 characters.

Why the truncation point matters more than the hard limit

A caption that's technically allowed doesn't mean it gets read. Instagram, LinkedIn and TikTok all fold long text behind a "more" tap, and most scrolling users won't tap it. Treat the truncation point — not the platform's maximum — as your real word budget for anything that needs to land without extra effort from the reader.

A quick workflow for staying in range

1. Draft your caption, then check its character count with a word/character counter as you write.
2. Move your key message or call-to-action before the platform's truncation point, not after it.
3. Add hashtags after the visible cutoff where possible — they don't need to be seen to be indexed.
4. Keep a resized version of your graphic ready for each platform's dimensions alongside the caption, so the whole post is platform-correct in one pass.