HowNet duplicate checking system can detect master's degree and undergraduate graduation thesis. The PMLC system of HowNet is specially used to check the graduation thesis of junior college and undergraduate course, and this system is only used when it is finalized. HowNet AMLC system is suitable for duplicate checking of titles and published papers, and the maximum number of words cannot exceed1.4000 words (including spaces). The TMLC system of HowNet is generally used for duplicate checking of master's and doctoral dissertations, with a maximum of 260,000 words (including spaces).

So you can use HowNet to check doctoral and undergraduate papers.