A duplicate word finder scans any text you paste in and lists every word that appears more than once, together with the number of times it repeats. It is a free online proofreading tool used by writers, editors, students and SEO writers to catch repetition before publishing.
Paste your text into the input box, optionally tick the Case-Sensitive option, and click Find Duplicates. The tool instantly lists each repeated word and how many times it appears. Everything runs in your browser - there is no upload and no waiting.
Yes. The tool is 100% free, requires no sign-up or account, and has no usage limits or watermarks. Open the page, paste your text, and use it as often as you like.
No. The duplicate word check runs entirely in your browser using JavaScript. Your text never leaves your device, so it is safe to paste drafts, work documents or any confidential writing.
By default the tool ignores case, so 'The' and 'the' count as the same word. If you need to distinguish them, enable the Case-Sensitive option before clicking Find Duplicates.
Repeated words make text feel repetitive and can weaken your message. Checking for duplicates helps you spot overused terms, tighten your writing, avoid accidental typos that repeat a word, and keep headlines and product copy varied and punchy.