Plagiarism Checker

Plagiarism is using someone else’s words, ideas, or work without giving them credit. There are different types of plagiarism and a plagiarism checker helps you find these matches before you submit or publish.

The Writing Suite gives you the full set of CopyChecker AI-powered writing tools in one workspace. That includes the plagiarism checker, AI detector, AI humanizer, paraphrasing tool, grammar checker and more.

Yes. You can start from scratch and edit, check and refine it without leaving the page. After you get your results, you can make changes right in the editor and run the check again.

No. Your text carries over from one tool to the next automatically. You do not have to paste anything again when you move between our writing tools.

No, you can start without one. Create a free account to save your projects and documents, and upgrade when you need paid features or a higher word limit.

Yes. Paste your text, click a button, and get clear results with highlighted matches and plain scores. There is nothing to install and no setup, so you can check your first document in minutes.

You can check up to 20,000 words at once with a premium subscription. Free users get 1,000 words per month.

Absolutely. CopyChecker preserves the format when you paste text whether you copied it from a website, document, or a google docs.

It’s a full text editor with AI powered writing tools built in. Format your text, add links, and make any changes you want to your text easily.

No. Undo and redo are free, so you can edit as much as you like without using any credits. Only running a check uses credits.

No. Your progress isn’t saved when you move to another tool, so finish what you’re doing before you switch. Copy your text or download your work first if you want to keep it.

CopyChecker checks your text for exact and partial similarity, highlights each match, and shows source details when they are available. You can verify every result yourself instead of relying on a number alone. No tool can judge intent, so always review flagged passages in context.

The plagiarism percentage shows how much of your text matches other content. A match is not always copying. It can be a quote, a common phrase, or a cited passage.

Exclude URL lets you pick pages the plagiarism checker should skip. CopyChecker won’t compare your text against those pages.

Add the URLs you want ignored and the scan skips those pages. It’s useful when you do not want your published URLs or known pages from showing up in the report.

Lower is better, and many schools and publishers look for a score under roughly 10 to 15 percent. The right number depends on your institution or client.

Yes! You can check 2,000 words for completely free. Premium users get advanced features with additional words.

Yes. Paste a webpage link and CopyChecker checks its content for similarity, with no copying and pasting needed.

You can upload PDF, DOCX, and TXT files and also paste your text, or write directly in the editor.

CopyChecker checks plagiarism in 13 languages, so you can review content for different markets and regions.

Yes. Select a matched source in your results and add a citation straight to your text in APA, MLA, or Chicago format.

Yes. Select a highlighted match and rephrase it in the editor to remove the plagiarism. You can choose between advanced paraphrasing modes to find the right wording and keep the original meaning.

Yes. Writing Suite subscribers can download your report as a PDF or Word file, or share it through Google Drive, email, LinkedIn, or WhatsApp.

Yes. When you’re done editing, download your final text as a PDF or Word file, ready to submit or publish.

CopyChecker never shares your text with third parties or uses it to train AI. Your text is also immediately deleted after generating your plagiarism report.

If you have published your text on a blog or website, submitted it before, or shared an earlier draft online, the checker will find it as a match. Add those URLs to the exclusion list and run the scan again.