Social media character limits for every network
Updated October 6, 2026. Figures from the official sources listed below.
Instagram captions allow 2,200 characters and bios 150. TikTok captions allow 4,000 and bios 80. A standard post on X is 280 characters. YouTube titles allow 100 and descriptions 5,000. LinkedIn posts allow 3,000 and Threads posts 500.
What are the character limits on each network?
| Network | Field | Limit |
|---|---|---|
| Caption | 2,200 | |
| Bio | 150 | |
| Username | 30 | |
| TikTok | Video caption | 4,000 |
| TikTok | Bio | 80 |
| X | Post (standard account) | 280 |
| X | Bio | 160 |
| X | Display name | 50 |
| YouTube | Video title | 100 |
| YouTube | Video description | 5,000 |
| Post | 3,000 | |
| Headline | 220 | |
| Threads | Post | 500 |
Do spaces and emoji count as characters?
Yes. Spaces, line breaks and punctuation all count. X weights some characters, including emoji and many non-Latin scripts, as two, so a post with several emoji reaches 280 sooner. Styled Unicode fonts can also count as more than one character on some networks.
How much of a caption do people actually see?
Only the first line or two before "more" on Instagram, TikTok and LinkedIn. The full limit is room for detail, not a target. Put the hook and the keyword people would search for in the first sentence.
Do the limits change?
They do. TikTok raised its caption limit in 2024 and X lets Premium subscribers post much longer posts. Check the help centers linked below if a field rejects text that fits this table.
Frequently asked questions
What is the character limit for an Instagram bio?
150 characters, including spaces and line breaks.
How many characters can a TikTok caption have?
Up to 4,000 characters per video caption.
Can I post more than 280 characters on X?
Standard accounts cannot. X Premium subscribers can write longer posts.