CopyFind

CopyFind is a free plagiarism and AI content detector: paste text or upload txt, pdf or docx files, then get match results and an AI generation score. The free tier covers up to 300 words, with a premium option for longer text.

CopyFind is a web based checker that does two jobs in one pass: it compares your text against a large index of web pages to flag duplicate or closely paraphrased passages, and it scores the text for signs that it was produced by an AI model such as ChatGPT. The workflow is deliberately plain. You paste text into a box or upload a .txt, .pdf or .docx file, run the scan, and get back matches plus an AI score. There is also an option to compare text against one specific target website, which is handy when you suspect a single source rather than the open web. The tool is aimed at people who publish or grade written work and need a quick originality signal before it goes out. Bloggers and SEO managers use it to catch duplicate copy before a post or client deliverable goes live. Teachers and students use it to sanity check submissions and drafts. Freelance writers can run a piece through the checker to confirm the draft is clean. The pitch is broad rather than specialist: it is not built around an editorial workflow or a citation manager, so it sits in the same space as general purpose originality and AI detection tools rather than in a niche. In practice the free tier covers short pieces up to 300 words, which is enough for a paragraph check but not for a full article, and a premium tier exists for longer work. File upload is supported alongside pasting, so you do not have to convert a document first. CopyFind states that uploaded documents are not stored, which matters if you are checking unpublished or client material. The AI detection result is a score rather than a definitive verdict, and like all detectors of this kind it should be read as a probabilistic signal, not proof of authorship. Where CopyFind fits among alternatives is as a lightweight, no set-up option: it does not ask you to install anything or connect a repo, editor or LMS. The trade off is depth. Teams that need batch checking, reporting exports or detailed source attribution will likely outgrow it, while individuals who need a fast paste and check will find it adequate.