2026-07-02
TikTok's caption limit grew from 150 to 4,000 characters, but the visible portion did not. Here is every limit and how much of it viewers actually see.
| Field | Limit | Visible before truncation |
|---|---|---|
| Video caption | 4,000 characters | ~70–100 characters |
| Bio | 80 characters | Fully shown |
| Username | 24 characters | Fully shown |
| Display name | 30 characters | Fully shown |
| Comment | 150 characters | Fully shown |
| Reply to comment | 150 characters | Fully shown |
| Direct message | 500 characters | Fully shown |
| Playlist name | 50 characters | Fully shown |
TikTok raised the caption limit from 150 characters to 4,000, a change that made captions genuinely useful for context and search. What did not change is the interface: the caption overlays the video in a narrow band at the bottom of the screen, and only the first line or two is visible before the viewer has to tap.
TikTok's bio is the tightest profile field among the major platforms — roughly half of Instagram's 150 and Threads' 150, and exactly half of X's 160. Eighty characters is one short sentence, which forces a single clear statement rather than a list of interests.
Because the caption sits over the video rather than beside it, TikTok shows very little of it by default — approximately 70 to 100 characters depending on device and whether the video has music attribution or a location tag. Everything past that requires a tap.
The expanded caption still matters. TikTok's search has grown substantially and caption text is indexed, so the full 4,000 characters function much like a video description on YouTube: largely unseen by casual viewers, but load-bearing for discovery.
TikTok imposes no explicit cap on the number of hashtags, but every hashtag counts against the caption's 4,000 characters, so the constraint is practical rather than formal. Three to five specific hashtags consistently outperform long blocks of general ones.
Broad hashtags such as #fyp and #foryoupage remain widely used, though there is no evidence they influence distribution. Narrow hashtags that describe the actual subject perform better because they place the video in a smaller, more relevant pool.
TikTok counts every character as one, with no weighting by script. Japanese, Chinese and Korean captions have the full 4,000 characters available. URLs count their literal length and are not clickable within captions, which is why links are conventionally placed in the bio.
The 150-character comment limit is worth noting separately, since it is unusually short. Replies are held to the same 150, which makes TikTok comment threads structurally different from those on platforms allowing several thousand characters per reply.
TikTok's editor shows a counter against the 4,000-character limit but gives no indication of where the visible portion ends. PostLen counts TikTok captions alongside X, Instagram, LinkedIn, Threads, YouTube and meta descriptions, so a caption intended for cross-posting can be checked against every destination in one pass, entirely within your browser.
4,000 characters, raised from the original 150. Only about 70–100 characters are visible over the video before the viewer must tap to expand.
80 characters — the shortest bio field among the major platforms, roughly half of Instagram's 150.
There is no fixed cap, but hashtags count against the 4,000-character caption limit. Three to five specific hashtags generally work better than long blocks of broad ones.
150 characters, and the same limit applies to replies.
No. TikTok counts every character as one regardless of script, so the full 4,000 characters are available in any language.
No. Length alone provides no benefit. Write what genuinely describes the video and includes the terms people would search for, then stop.
PostLen counts your draft against every platform in this article at the same time.
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