A Facebook post can hold 63,206 characters. The number that matters is far smaller: the feed shows about 477 before “See more”. This shows you what survives the cut.
Runs in your browser. Nothing you type leaves this page.
documented means Facebook publishes the number. observed means people measured it, and it can change without notice.
| What | Limit | How known |
|---|---|---|
| Post | 63,206 characters | observed |
| “See more” in the feed | ~477 | observed |
63,206 characters, observed. The figure comes from a Facebook engineer explaining the limit when it was raised in 2011 (“64206 – 1000 = 63206”) and matches behaviour since, but Meta publishes no current document that states it.
At about 477 characters, observed in a 2016 test of the feed. It is old, it varies by device, and it is still the most careful measurement anyone has published. The preview above cuts there.
What that means for writing: almost no one reaches character 63,206. Everyone reaches the fold, so that is where the post has to have made its point.
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.
Start free, no card → Free plan, then $12/month Pro or $39/month Siete. Flat, not per seat. Self-hostable.PostSiete Lens puts this count inside Facebook’s own composer while you type, with the fold line drawn where the feed cuts. It does the same on X, LinkedIn, Instagram and Threads. Free Chrome extension, no account, no trial. It reads — it never posts for you.
Add to Chrome — free →Yes, at their literal length. Only X charges a link a flat 23 whatever its length.
No. It varies by device and layout, and nobody has published a careful mobile measurement, which is why this page gives only the tested figure.
No. The counting runs in your browser; the page makes no network request with your text.