Before seeking external tools, check the owner's manual or the glove box for a "Radio Code Card." Many manufacturers include this with the vehicle's original paperwork.
While the process is straightforward, you might encounter a few issues: crucc 24 car radio universal code calculator 24 free
If you have proof of ownership, a local dealership can often provide the code associated with your vehicle's VIN or the radio's serial number. Before seeking external tools, check the owner's manual