If you're feeling overwhelmed by the prospect of cleaning up your website content, the suggestion to "get an overview of your content" may sound glib and unhelpful, but it really doesn't need to be more complicated than that.
There are plenty of tools available to assist you in putting together an overview, so there's no reason to ever waste your time manually creating a website inventory.
Free tools may require a bit more manual effort, whereas paid tools offer greater speed and ease of use. Whatever your budget is, any tool will be much faster and more accurate than having a student worker copy and paste page titles into a spreadsheet.
When evaluating whether free or paid tools are best for your organization, consider which of the basic three project ingredients are most important to you: speed, quality, and price.