Let’s assume you have a forgotten RAR password, no money to spend, and basic Windows skills. Here is the safest path:

: The legality of using such tools can depend on your location and the specific circumstances (e.g., if you're trying to access your own files or files you're authorized to access).

A well-known free tool for password cracking across multiple formats.

If you are looking for completely free tools, consider these open-source or freeware options: