You can even increase the level of compression on your files to save more space on your hard drive. That helps it move quickly, though, as conversions never took more than a minute during testing - even conversions of larger files. The program, itself, looks very blocky and dated, kind of like it was made for Windows XP and never updated. If you don't opt out, these programs can take over your browser, change your homepage, and add obnoxious toolbars, so be careful. When you're trying to install the program, it sends four different toolbars and add-on programs at you.
This program only converts RAR archives to ZIP files, so don't expect to turn them back if you need to. However, if you can avoid those, it does its job flawlessly.
In addition to looking and feeling incredibly dated, it's bogged down with add-on programs. Free RAR to ZIP Converter switches your file's format quickly, but it doesn't do itself any favors with its layout.