Why Your Post Was Rejected Even Though You Counted the Characters Yourself
Many platforms count characters using an encoding standard where emoji and certain special characters (accented letters, symbols outside basic Latin text) count as more than one character — sometimes 2, 3, or 4 — toward the actual limit, even though they display as a single visual character, which is why a manual character count can look fine while a platform still rejects the content as too long.
This specific gap between visual character count and technical character count is a genuinely common, frustrating experience, and it has a precise technical explanation.
Why emoji count as more than one character
Under common text encoding standards, many emoji are represented internally by multiple underlying code units — a single visible emoji can technically count as 2 or more characters toward a platform's limit, even though it looks like one character on screen.
Why accented and non-Latin characters can also count differently
Similarly, certain accented letters and characters from non-Latin scripts can be represented using more underlying code units than a basic Latin letter, depending on the specific encoding a platform uses to calculate its limit — this is a technical detail most users never need to think about until it causes an unexpected rejection.
How to avoid this surprise
Using a character counter that specifically matches the counting method of the target platform (rather than a simple visual character count) gives a more reliable check — and building in a buffer below the stated limit provides extra margin against this specific discrepancy.