Plagiarism — passing off someone else’s work as your own — can get students expelled, writers fired, and websites penalized by Google. Laws exist, but prevention is better than cure: before you publish, submit, or hand in your work, run it through a plagiarism checker. Here are 8 free tools that do the job.
1. Copyscape
The classic. Enter your page URL and Copyscape searches the web for copies of your content, highlighting duplicated text and showing where it appears. The basic URL lookup is free; premium features (batch search, Copysentry monitoring alerts) are paid.
Website: copyscape.com
2. Duplichecker
Paste your text (up to 1,000 words free per check) or upload a file, and Duplichecker compares it against web sources. Best for short articles, essays, and blog drafts. A free account raises the limits.
Website: duplichecker.com
3. SmallSEOTools Plagiarism Checker
Paste text up to 1,000 words and get phrase-by-phrase results labeled by originality. It’s quick, no signup needed, and sits alongside a big suite of other free SEO tools.
Website: smallseotools.com/plagiarism-checker
4. Plagiarisma
A straightforward checker supporting text paste, file upload, and URL input. It shows copied passages alongside the source websites where they were found. Free with registration.
Website: plagiarisma.net
5. Quetext
Quetext’s free plan lets you check up to 500 words with its DeepSearch technology, which catches cleverly paraphrased copying — not just exact matches. The color-coded report makes it easy to see what needs rewriting.
Website: quetext.com
6. Grammarly Plagiarism Checker
Grammarly’s premium plans include a plagiarism detector that compares your writing against billions of web pages and academic databases. If you already use Grammarly for grammar, this is a convenient two-in-one.
Website: grammarly.com
7. Prepostseo Plagiarism Checker
Paste up to 1,000 words free (more with a free account) and get a percentage-based originality report with highlighted matches and sources. Simple interface, no fuss.
Website: prepostseo.com/plagiarism-checker
8. Scribbr Plagiarism Checker
Aimed at students and academics, Scribbr compares your document against a huge database of publications and web sources. The full check is paid, but the free version gives you a useful first pass before submission day.
Website: scribbr.com
A Quick Note on Free Checkers
Free tools are great for a first pass, but they have word limits and smaller databases than paid academic systems like Turnitin. For a thesis or journal submission, check what your institution uses — and always cite your sources properly. No checker replaces honest writing.
Last updated: September 30, 2026. Every tool below is active and offers a free way to check your work.
Founder & Editor at Durofy
