Make sure every word is your own with Quillmark's AI-powered plagiarism checker, which uses advanced models to find copied passages in your text and catch other writing issues.
Enter text or upload a file to check for plagiarism and writing errors.
Your ideas are yours alone, and your writing should show it. Quillmark's AI-powered plagiarism detector makes it easy to say what you mean in a way that's clear, original, and honest about its sources.
Instantly find copied passages by pasting or uploading your research paper, essay, or article.
Quickly protect your integrity by checking your work against billions of web pages in one click.
Get an originality score for your document so you can see how distinct your ideas really are.
Speed up your work with guidance on what—and how—to cite, plus live feedback on your writing.
Go past plagiarism detection and make the writing itself better. From final papers to internship applications, Quillmark's writing assistance sharpens your drafts and teaches you to use generative models responsibly, so you're a step ahead at school and at your first desk.
Quillmark helps you check your draft for both copied passages and generated text, so you can hand in your work knowing every line of it is yours.
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91% of students say Quillmark Pro helped lift their grades.
“I genuinely love Quillmark when I'm writing. I especially love revising even the dullest sentence that trips the originality check, because seeing a clean report is what I live for.”
“Essentially, Quillmark bundles what I used to keep in four tabs: a thesaurus, a solid grammar checker, and a plagiarism check. You can buy each of these separately elsewhere, but having them in one window is genuinely nice.”
Ready to go deeper into plagiarism and citations? Learn how citation styles differ, which strategies actually keep your work clean—and plenty more.
Beyond catching copied passages, Quillmark helps you tidy your citations, distil your argument with clarity and concision, and sharpen every sentence.
Quickly reword text for essays, emails, articles, and more with Quillmark's paraphrasing tool.
Paraphrasing ToolMake sure your essays read clearly, arrive mistake-free, and land the right word with Quillmark's essay checker.
Essay CheckerGet well-formatted author-date, numeric, and note-style citations with Quillmark's citation generator.
Citation GeneratorEasily identify machine-generated passages in your work with Quillmark's AI detector.
AI DetectorJoin the 23 million people who use Quillmark to sharpen their writing every day.
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