In my search for the best free duplicate content checkers. Check for plagiarism.
Dupli Checker
Caught the same one line of duplicate content as Small SEO Tools. These two content checkers look to be using the same engine to scan and analyze text.
https://www.duplichecker.com/
quetext
Limited amount of searches with free version
Nice interface. Displays underlined text that is duplicated
https://www.quetext.com/results/a6a742613f9c128ceb26
Small SEO Tools
https://smallseotools.com/plagiarism-checker/
Key Search
Looks to be very accurate but does not display the source.
https://www.keysearch.co/tools/plagiarism-checker
