There are a number of great plagiarism checker tools available online. Here are some of the best:
Copyscape is a popular plagiarism checker that allows you to check for plagiarism in both text and web pages. It has a free and paid version, with the latter offering more features.
Plagiarism Checker X
Plagiarism Checker X is another excellent tool for checking for plagiarized content. It offers a free and premium version, with the latter offering more features such as grammar checking and bulk checking.
Small SEO Tools Plagiarism Checker
Small SEO Tools Plagiarism Checker is a free online plagiarism checker that offers a number of features such as checking for duplicate content, grammar mistakes, and more.
Duplichecker is a free online plagiarism checker that offers many features such as checking for duplicate content, grammar mistakes, and more.
PaperRater is a free online proofreading and grammar checking tool. It also includes a plagiarism checker which can be used to check for plagiarized content.
These are just some of the best plagiarism checker tools available online. There are many more out there, so be sure to do your research and find the one that best suits your needs.