Word Counter

Character counting operates at the Unicode code point level. The tool uses the spread operator (`[...text]`) to correctly split the string into code points rather than UTF-16 code units, ensuring that emoji, CJK characters, and surrogate pairs are each counted as one character. Word counting splits text by whitespace boundaries using a regex (`/\S+/g`), which handles multiple consecutive spaces, tabs, and newlines.

Sentence counting uses a regex that matches sentence-ending punctuation (., !, ?) followed by whitespace or end of string, with special handling for common abbreviations (Mr., Dr., etc.) to avoid false positives. Paragraph counting splits by two or more consecutive newlines. Reading time is estimated at 200 words per minute for English (the average adult reading speed) and 500 characters per minute for Korean and other CJK languages. The SNS character limits are hard-coded to each platform's current specifications and checked against the total character count in real time.