Simply ask. Many professors are happy to create a "Draft" folder in Turnitin where you can submit multiple times to see your similarity report without it being a final grade.
At first glance, these seem like goldmines. You find a Class ID, type in the enrollment key, and suddenly you have access to a submission page. You upload your essay, and Turnitin generates a Similarity Report. Problem solved? Absolutely not. turnitin class id and enrollment key free
“I used a ‘free enrollment key’ from a Discord server. The next day, the server admin messaged me with my real name, my university, and my paper. He demanded $500 or he would upload my paper to a public plagiarism website. I had to pay.” Simply ask
Many university writing centers have their own Turnitin environments. They can often provide a temporary ID for "formative feedback" (checking your work before submission) that is set to not save your paper to the repository. You find a Class ID, type in the