Free Rental Movie at RedBox 1/19 Only 9 years ago 2 Comments Free Stuff Get a free movie rental at Redbox locations by using code K6W3G4. This code is only good for today 1/19 and can be used once per debit/credit card. Enjoy! Share This Post Facebook Comments Erin The redbox I went to said this was an invalid code. I’ll have to check the code to see if it is the same one. I got it from a different blog and I think they messed it up and then fixed it later in the day after I had already copied it down. Since I promised my daughter a movie I had to pay the $1 for it 🙁 Chrissy My sisters and I all used this code and got a free movie! Thanks!!