Parallel PDF Password recovery is utility for recover lost passwords of PDF documents. It supports RC4 and AES algorithms with 128 or 256 bit keys. Local version can use up to 4 processors or cores and one or more GPU of your home PC. The simple Password Definition Language supports all well-known standard attacks (such as brute force, dictionary, misspelled password recovery etc) and also allows users to make their own attack types. PDL language is extremely efficient if user remembers any information about a forgotten password (for example, the password consists of two words separated by a special sign or has some digits at the end). The utility is optimized for all modern processors, like Core 2 or Athlon, support NVIDIA CUDA technology.