Word count, character count, and sentence count, all updating as you type or paste.
Text is trimmed and split on whitespace, so each run of characters between spaces counts as one word.
Checking essay or post length against a word limit, meeting a minimum character count for a bio or meta description, or getting a rough sentence count for readability.
It should be very close for typical text, since both count space-separated words the same basic way — small differences can appear around hyphenated words, numbers with commas, or unusual punctuation, where different tools make slightly different judgment calls.
Sentence counting relies on detecting periods, question marks, and exclamation points followed by a space — abbreviations like 'Dr.' or decimal numbers like '3.14' can occasionally be miscounted as sentence breaks, a known limitation of simple punctuation-based counting.
Worked example: pasting a 250-word essay draft here instantly shows whether it clears a '200 word minimum' assignment requirement, without needing to open a separate word processor.