QuickPar is a computer program designed for the Microsoft Windows operating system that creates recovery information for a file or group of files. If such information is available and some files are damaged or missing, QuickPar may be able to reconstruct the originals from the PAR volumes. It is often used to recover damaged or missing files that have been downloaded through Usenet.

There are two main versions of PAR files: PAR and PAR2. The latter file format is superior to the first, and lifts many of its previous restrictions. QuickPar is freeware but not open source. It uses the Reed-Solomon error correction algorithm internally to create the error correcting information.

Some of these old versions are available on the developer's web site. In addition, you can view more information for each version and download the files in another language.