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.