TikTok character limits explained
TikTok allows up to 2,200 characters in a video caption, which is shared between your actual caption text and your hashtags. However, TikTok truncates captions in the feed after approximately 100 characters — everything beyond that is hidden behind a "more" tap. This makes the opening line of your caption the most important real estate for driving engagement. Your profile bio is tightly limited to just 80 characters, and usernames can be up to 24 characters.
Writing captions that get tapped
Because TikTok's feed shows only the first ~100 characters before the "more" cut-off, treat your caption opener like a headline: ask a question, tease the punchline, or state the value immediately. Save your hashtags for the end of the caption — they contribute to discovery but don't need to appear before the fold. A good TikTok caption is direct, relatable, and invites interaction (comments, shares, duets).
Optimising your TikTok bio
With only 80 characters, your TikTok bio has less room than a tweet. Focus on your niche and a single call to action — "Follow for daily [topic]" or "DM for collabs" is often enough. Emoji can convey tone efficiently within the character budget. Line breaks count toward your limit, so use them only where they genuinely improve readability. Draft here, then paste directly into the TikTok app.
Social media character limits: full comparison
Character limits vary significantly across platforms. Use this table as a quick reference — click any platform name to open its dedicated counter.
| Platform | Post / Caption | Bio | Username | Other limits |
|---|---|---|---|---|
| 3,000 | 2,600 (About) | — | Headline: 220 · Message: 300 | |
| Twitter / X | 280 | 160 | 15 | Display name: 50 |
| 2,200 | 150 | 30 | — | |
| YouTube | 5,000 (desc.) | — | — | Title: 100 · Tags: 500 |
| TikTok | 2,200 | 80 | 24 | — |