Keyword Density Analyzer

Keyword density is how often a word appears relative to the total number of words in a text, written as a percentage: count divided by total words, times 100. It is a rough signal writers use to check that a topic's key terms appear often enough to be relevant without being repeated so much that the writing reads as spam. This tool calculates density on single words only. It lowercases your text, splits it on a regular expression that keeps letters, digits, apostrophes and hyphens (so 'don't' and 'state-of-the-art' survive as one token), and counts every resulting token toward the total. For the ranked table it then drops a built-in list of about forty common English stop-words (the, and, of, to, is, and similar) and any word of two characters or fewer, then shows the 30 most frequent remaining words with their raw counts and density. Note that the density percentage is calculated against the total word count, including the stop-words that were filtered out of the table, so individual percentages will not sum to 100. It does not analyze two-word or three-word phrases, does not stem plurals to their root, and only understands ASCII-style English tokens.