A LinkedIn post can run to 3,000 characters. The feed shows roughly the first 140 on a phone and 210 on desktop before “…see more”, so the limit rarely decides whether a post works. The fold does.
Runs in your browser. Nothing you type leaves this page.
documented means LinkedIn publishes the number. observed means people measured it, and it can change without notice.
| What | Limit | How known |
|---|---|---|
| Post text | 3,000 characters | documented |
| “…see more” on a phone | ~140 | observed |
| “…see more” on desktop | ~210 | observed |
| Comment | 1,250 characters | observed |
3,000 characters, documented. LinkedIn’s API reference for posts says it plainly: “The maximum length of the text of a UGC Post is 3,000 characters.” The newer Posts API refuses longer text with FIELD_LENGTH_TOO_LONG without repeating the number.
About 140 characters on a phone and 210 on desktop, both observed. LinkedIn publishes neither figure. Both come from people measuring the feed, and both can change without notice. The preview above cuts at 140 because that is the version most people scroll past.
What that means for writing: the first line is the post. Everything under the fold is read only by the people the first line already convinced.
1,250 characters in a March 2026 test, observed. LinkedIn documents no figure for comments, and one guide reports 1,750 instead, so treat 1,250 as the safe number rather than the certain one.
This page checks one platform. PostSiete takes one idea and writes a native draft for LinkedIn, X, Instagram, Threads, Facebook, TikTok and YouTube Shorts, each measured against its platform’s limit while it is written, and previewed as it will post.
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Add to Chrome — free →Yes. Everything in the text counts at its literal length. Only X charges a link a flat 23 whatever its length.
Because you are looking at it on a phone, where the fold comes at about 140. Desktop shows more of the same post.
No. The counting runs in your browser; the page makes no network request with your text.
FIELD_LENGTH_TOO_LONG without stating the figure.