Facebook’s post limit is famously enormous — 63,206 characters — so the ceiling is rarely the problem. What matters is the fold: on desktop, posts are clipped behind “See more” at roughly 477 characters, and on mobile much earlier. Count your draft below against both.
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| Field | Limit |
|---|---|
| Post | 63,206 charactersThe long-standing hard limit — an engineering in-joke (63,206 = “63,2Oh!6”). |
| Visible before “See more” (desktop) | ~477 charactersApproximate; varies with line breaks and surface. |
| Visible before “See more” (mobile) | ~125 characters |
| Page intro / bio | 101 charactersThe short “Intro” blurb on profiles and Pages; widely cited limit. |
| Comment | ~8,000 characters |
| Ad primary text (recommended) | ~125 charactersAds accept more, but Meta’s guidance is to keep primary text short. |
Guide
Facebook’s hard limit of 63,206 characters is the largest of any major network — closer to a short story than a status update. You will essentially never hit it, which makes it a trap: with no technical pressure to be brief, it is easy to bury the point. The number that should discipline your drafts is the truncation fold, not the ceiling.
On desktop feeds, Facebook collapses posts behind “See more” at roughly 477 characters; on mobile — where most Facebook time is spent — the fold lands around 125. Everything below it is invisible until a reader actively expands, and most never do.
Treat the first sentence as the whole post and everything after as an appendix. Short posts also have an engagement track record: multiple publisher studies over the years have reported that very short Facebook posts (under ~80 characters) tend to out-engage long ones, though exact figures vary by study and industry — treat them as directional, not gospel.
Line breaks count as characters, and Facebook preserves them, so a scannable two-line structure (hook, then payoff) usually beats a paragraph. Links generate a preview card, so you rarely need to spend characters describing the destination.
Page intros (the short “bio” line on your Page) cap at 101 characters, and ad primary text is a different discipline again — Meta recommends about 125 characters before truncation in most placements. The same message therefore needs three lengths: post, intro, ad.
If Facebook is one of several networks you publish to, the 63,206-character allowance can lull you into writing captions that X, Threads, or Bluesky will reject outright. SocialKit flags each network’s limit as you compose a single post for all of them, so the Facebook-length draft never silently fails on the short-form platforms.
Facebook posts can contain up to 63,206 characters. In practice, the visible cutoff matters more: feeds collapse posts behind “See more” at roughly 477 characters on desktop and around 125 on mobile.
At 63,206 characters Facebook simply stops accepting input (or rejects the API request). Below that, nothing is cut — but text past the “See more” fold is hidden until readers expand it.
There is no official ideal, but publisher studies have repeatedly found short posts (one or two sentences) earn more engagement than long ones. Keep the hook inside the first ~125 characters so mobile users see it before the fold.
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SocialKit shows every network’s character limit while you write, so one draft fits all 11 platforms — scheduled from a single calendar.
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