Facebook Character Counter — Free Post & Caption Length Checker

Facebook's character limits: what actually matters

Facebook's technical character ceiling sits at a nearly unlimited 63,206 characters — far more than anyone should ever use for a feed post. The real constraint is behavioural, not technical. The feed truncates at approximately 480 characters with a "See More" link, and engagement data consistently shows that posts cleared well before that fold outperform long-form updates by a significant margin.

PostTruncate's Facebook character counter tracks your running total in real time with a colour-coded display, marking both the 80-character sweet spot and the 480-character fold so you can make an informed decision before publishing — not after watching your reach flatline.

The 480-character fold: what hides behind "See More"

When a Facebook post exceeds approximately 480 characters in the feed, the platform collapses the remaining text behind a "See More" tap. This is not simply a display limitation — it is a friction point. Every additional tap required to read your full post is a drop-off opportunity, and mobile users in particular scroll past collapsed posts without engaging.

Posts that stay under the fold receive the full text treatment in the feed: no interruption, no tap required, no decision to make. The reader absorbs the entire message before they've consciously chosen to engage, which is exactly when organic sharing and commenting happens most naturally.

Why posts under 80 characters consistently outperform longer ones

Facebook's own engagement research — and years of third-party analysis — point to the same conclusion: posts under 80 characters receive significantly higher like, comment, and share rates than longer equivalents. The reasons are straightforward. Short posts render fully at a glance on every device. They leave visual whitespace that makes the post feel less demanding. And they force the writer to say one thing clearly, rather than three things vaguely.

This doesn't mean every post should be a single sentence. It means the opening line — the part of the post visible before any tap — should be able to stand alone. If the whole message fits in 80 characters, publish it at 80. If it genuinely needs more, keep the essential point in those first 80 characters and expand below the fold.

Fancy Unicode fonts: the reach killer nobody talks about

A growing number of Facebook users copy-paste text formatted with Unicode lookalike characters — the kind that make regular letters appear bold, italic, or styled in novelty fonts without using actual formatting. These characters are not real text. They are symbols that happen to resemble letters.

The consequences are serious. Screen readers used by blind and low-vision users read these characters as garbled nonsense — a sentence formatted in Unicode bold becomes a string of incomprehensible symbol names. Beyond accessibility, Facebook's algorithm treats heavy use of pseudo-Unicode text as a spam signal, silently suppressing the post's organic distribution.

PostTruncate detects pseudo-Unicode characters in real time and flags them before you publish, so you can replace them with standard text and restore both accessibility and reach.