Plagiarism is a serious offence at university, and with rapid developments in tech and AI, it’s especially easy to fall into the trap. To stay clear of accusations, you can consider using a free plagiarism checker, though such tools aren’t always accurate.
In the UK, nearly 7,000 students were formally caught using AI to cheat in the 2023 to 2024 academic year alone. In the US, 39% of undergraduates admitted to copying or paraphrasing internet sources without citation.
According to the Harvard Crimson, the second most-cited violation out of the 138 academic integrity cases Harvard’s Honour Council heard during the 2020 to 2021 school year was plagiarism, just behind exam cheating.
Consequences vary. The best-case scenario is that students receive a failed grade. Much worse, they may be put on academic probation or expelled. International students could lose their student visa, their literal right to stay in the country.
That’s why it’s important to make sure you’re:
- attributing quotes
- paraphrasing borrowed ideas; and
- cross-checking facts on reliable websites.
You can even go the extra step by running your work through a plagiarism checker.
Here are nine free plagiarism checkers, ranked:
It’s important to note that while plagiarism checkers are designed to spot copied or closely paraphrased text from online sources, they are not perfect. They might miss content from lesser-known sources, and they aren’t built to detect AI content.
Students have also been falsely accused of plagiarism or using AI in the past. Read the full article ranking free plagiarism checkers on Study International if you want to learn how to navigate such false accusations at university.



