Text Repetition Checker

Repetition in a long draft is genuinely hard to self-detect, because by the third pass you are reading what you meant rather than what is on the page. The duplications that survive are usually mechanical: a paragraph pasted twice during restructuring, a bullet that appears in both an intro and a summary, boilerplate copied across sections that were later merged. All of these are obvious to a reader and invisible to the author.

Exact-match detection catches that whole category cheaply, and it has become more valuable as more drafting happens with AI assistance. Generated long-form text has a characteristic failure mode where the same claim is restated in slightly different words across several sections, and the verbatim repeats are the visible tip of it. Finding them usually leads you to the paraphrased ones nearby.

What this cannot catch is repetition of idea rather than of string. Two paragraphs making the same point in entirely different words are identical to a reader and invisible to any exact-match check, and that is the more common problem in edited writing. Use this to clear the mechanical duplication first, then reread section headings in sequence — if two headings promise the same thing, the sections underneath probably deliver it twice.