Quick Answer
TikTok captions allow up to 2,200 characters. Bios are limited to 80 characters, and comments are capped at 150 characters.
Check Your Character Count
Paste your TikTok caption or bio into our free word counter tool. See your character count instantly — no sign-up required.
Frequently Asked Questions
What is the TikTok caption character limit?
TikTok captions can be up to 2,200 characters. That's the maximum TikTok gives in its own developer documentation, which we checked on 19 September 2026.
What is the TikTok bio character limit?
TikTok bios are limited to 80 characters — one of the shortest bio limits across major social platforms.
How long can a TikTok comment be?
TikTok comments are limited to 150 characters. This is shorter than a standard tweet.
Do hashtags count towards TikTok's caption limit?
Yes. Hashtags are included within the 2,200-character caption limit. Each hashtag (including the # symbol) reduces your available caption space.
What's the ideal TikTok caption length?
For maximum engagement, keep captions between 50–150 characters. Use the full 2,200 only when the content genuinely benefits from a detailed caption.
Where this data comes from
The sources and check dates in this table come from one versioned data file — the place we record every check we make. The rest of this page, and the limits built into our tools, are still separate copies, so when we correct a figure we correct it in each place. This table is how we keep ourselves honest while we do.
We've checked some of these figures, not all of them yet
Some figures on this page have been checked against the platform's own documentation — those show a source and the date we checked. The rest came across from our older pages and haven't been checked yet, so they say so. We'd rather show you which is which than print a date we haven't earned.
Still to be checked against: TikTok Support (support.tiktok.com) and the TikTok Business Help Centre
| Field |
Limit |
Notes |
Source |
Last checked |
| Caption |
2,200 |
VERIFIED 2026-09-19: TikTok's own Content Posting API documentation confirms 2,200 characters (specified as UTF-16 code units, i.e. "runes") is the current, enforced maximum. No current official TikTok page (support.tiktok.com, ads.tiktok.com/help, or developers.tiktok.com) could be found stating 4,000 despite a thorough search — the reference page's "increased from 2,200 in 2023" claim is unsubstantiated in this pass. |
https://developers.tiktok.com/docs/en/content-posting-api-reference-direct-post |
2026-09-19 |
| Bio |
80 |
One of the tightest bio limits across platforms. Checked 2026-09-19 — a likely-correct official URL (support.tiktok.com profile-setup guidance) was found via search corroboration, but TikTok's Help Centre is heavily JS-rendered and no exact quoted figure could be extracted with available tools. Not marked verified per guardrail 7. |
No source recorded |
Not yet verified against the platform’s own documentation |
| Username |
24 |
Letters, numbers, periods, and underscores. Confirmed via TikTok Support: "Your username must contain 2 to 24 characters." |
https://support.tiktok.com/en/getting-started/setting-up-your-profile/changing-your-username |
2026-09-19 |
| Comment |
150 |
Surprisingly short compared to other platforms (not reached in the 2026-09-19 verification pass) |
No source recorded |
Not yet verified against the platform’s own documentation |
| Name / Display Name |
30 |
Your visible display name. TikTok itself calls this field "nickname", not "display name" — same field. Confirmed via TikTok Support: "Enter your desired nickname. You can enter up to 30 characters." |
https://support.tiktok.com/en/getting-started/setting-up-your-profile/changing-your-nickname |
2026-09-19 |
| TikTok Ad Headline |
100 |
Spark Ads and In-Feed ad headlines (not reached in the 2026-09-19 verification pass) |
No source recorded |
Not yet verified against the platform’s own documentation |
| TikTok Ad Description |
100 |
Ad description text (not reached in the 2026-09-19 verification pass) |
No source recorded |
Not yet verified against the platform’s own documentation |
| Hashtags |
Included in caption |
Count towards the 2,200 caption limit (corrected 2026-09-19 to match the verified caption figure; previously said 4,000) |
No source recorded |
Not yet verified against the platform’s own documentation |
What we corrected
This page used to say TikTok captions could run to 4,000 characters, and that the limit went up from 2,200 in 2023. We couldn't find any current TikTok page that says so. TikTok's own developer documentation gives 2,200, so that's the figure we now show.
