Par-N-Rar is described as 'graphical utility which accepts a directory as input and will repair/verify any PAR/PAR2/SFV/MD5 files in that directory. Once it verifies a set of files, it will attempt to unRAR them'. There are seven alternatives to Par-N-Rar for a variety of platforms, including Windows, Linux, BSD, Mac and Wine. The best alternative is MultiPar, which is free. Other great apps like Par-N-Rar are checksum (Free), DataHealthCheck (Free, Open Source), ICE ECC (Free) and File Checksum Utility (Free).
checksum is an easy-to-use, no-nonsense BLAKE2, SHA1 & MD5 hashing program for Windows, capable of creating & verifying hashes of files and folders, even whole drives, with just one or two clicks. It is robust, lightning fast, intuitive, and completely customizable.
DataHealthCheck is a portable app to check your files for corruption or display their md5/sha1 hash. It is faster than other apps because it checks for corrupted files and update hashes of changed files in one pass.
This software allows to generate MD (Message Digest) and SHA hashes from a file or files or files in a directory. Checksum is an value calculated from a content of file by special algorithm. You can also verify the file integrity of the downloaded document or program.
ParPar is a high performance, multi-threaded PAR2 creation tool and library for node.js. ParPar does not verify or repair files, only creates redundancy. ParPar is a completely new, from ground-up, implementation, which does not use components from existing PAR2 implementations.