FREE Redbox Code- TODAY ONLY! This post may contain affiliate links. Please see the full disclosure policy here. Posted on August 3, 2009 Written by Mary Leave a Comment Here is the FREE Code for the month from REDBOX: 27HZ4KT. This can be used once per debit/credit card, so you can rent more than one for free by using different cards! New to Redbox? Check out THIS POST for more info!