Yes, you can. Most of the plagiarism checker tools give free trials for you to experience the tool. If your research paper is not very lengthy and you do not have a recurring need, you can try this method. You can check your research paper for plagiarism for free up to 1000 words on Quetext plagiarism checker. If you have a recurring need, you can subscribe to market leading plagiarism checker like Quetext that has plans starting from $5.5 per month when purcahsed annually.