Character count refers to the total number of individual characters in a piece of text. In English, each letter, digit, space, and punctuation mark typically counts as one character. The way characters are counted can vary by platform and context.

Social media platforms like X (Twitter) count every character including spaces, while some word processors offer both "with spaces" and "without spaces" counts. Understanding these differences is essential for staying within posting limits. Writing style guides often emphasize the importance of concise, character-conscious writing.

In programming, JavaScript's String.length counts UTF-16 code units, which means emoji and some CJK characters may be counted as 2. Using [...str].length provides a more accurate count of visible characters.

A character counter tool helps you monitor text length in real time, preventing limit overflows in forms, ads, and social posts. Content writing books also cover strategies for writing within strict character constraints.