Counted in your browser, nothing uploaded
Instagram caption counter and what Instagram documents
Short answer
Meta's Instagram documentation defines the caption field and does not put a character count on it. The two pages read on 2026-10-08, the Content Publishing guide and the IG Media object reference, describe what the caption contains and who can see the at sign in it, and neither states a maximum. The counter below therefore measures your caption three ways and sets no pass mark.
Key takeaways
- There is no Instagram caption character limit in the Meta documentation read on 2026-10-08, so this page does not state one.
- The counter still measures in all three units, because a limit stated in one unit cannot be compared with text counted in another.
- Meta documents that the at sign is excluded from a caption unless the app user can perform admin-equivalent tasks on the connected Facebook Page.
- Nothing is uploaded.
The counters
Three measurements, no denominator. A caption with no published ceiling is still worth measuring, because the difference between the three numbers is the size of the problem you would hit if you moved the same text to a platform that does publish one.
caption
No page read on 2026-10-08 states a length limit for this field, so the counter runs without a denominator.
No denominator, because the caption pages read on 2026-10-08 state no length limit. All three measurements are shown because the three units disagree on every non-ASCII character, and a platform that documents its limit in one of them cannot be compared against text counted in another.
Where the text is cut off
The Meta pages read on 2026-10-08 state no character count at which a caption is truncated. Instagram shows a "more" control, and the point at which it appears is not documented in those pages.
What Meta actually documents about the caption
The IG Media object reference describes the field in one sentence: "Caption. Excludes album children. The @ symbol is excluded, unless the app user can perform admin-equivalent tasks on the Facebook Page connected to the Instagram account used to create the caption. Available for Instagram API with Facebook Login only."
The Content Publishing guide adds the conditions around it rather than a length: media must be "hosted on a publicly accessible server at the time of the attempt", and an account on a Page that requires Page Publishing Authorization cannot publish until that authorization completes.
Between them, the two pages describe what the field holds and who can publish into it. Neither states a character count, so neither this page nor the counter on it states one.
The at sign rule is the one documented behavior here that changes a draft. A caption that relies on a mention resolving behaves differently for an app user with and without admin-equivalent tasks on the connected Page.
Why a counter with no pass mark is still worth having
The three units disagree about exactly the characters that make a caption worth reading. That is computed below, from the same measurement code the counter uses.
The practical use is comparison rather than compliance. A draft written for a feed post can be moved to a platform that does publish a limit, and the byte and code unit columns are what tell you whether the same text still fits there.
Frequently asked questions
What is the Instagram caption character limit?
Meta's Instagram documentation read on 2026-10-08 does not state one. The Content Publishing guide and the IG Media reference both describe the caption field without a character count, so this page does not state a limit either.
Why does the Instagram caption have no number on it?
Because none of the Meta pages read on 2026-10-08 state one. Filling the space with a figure from elsewhere would present someone else's number as Instagram's rule.
Does Instagram document where a caption is cut off?
The pages read on 2026-10-08 state no character count for the "more" control. The counter measures length only.
Why is the at sign sometimes missing from an API caption?
The IG Media reference states that the at symbol is excluded from the caption "unless the app user can perform admin-equivalent tasks on the Facebook Page connected to the Instagram account used to create the caption."
Sources
- Meta for Developers: Instagram Platform, IG Media object reference (checked 2026-10-08)
- Meta for Developers: Instagram Platform, API Content Publishing (checked 2026-10-08)
Every figure on this page is quoted from the platform document named above, with the date it was read. Where those pages state no limit, this page states none and says so, rather than filling the gap with a figure from somewhere else.