WinRAR - the data compression, encryption and archiving tool for Windows that opens RAR and ZIP files. Compatible with many other file formats. How can I decompress a file? To decompress a file, you typically need a decompression or unzipping tool, like WinZip or 7-Zip. These tools can extract the original files from the compressed format. Extract ZIP, RAR, TAR, TGZ, 7Z etc - Online File Extractor Every tool you need to use decompression is at your fingertips. All 100% free and easy to use! WinRAR - the data compression, encryption and archiving tool for Windows that opens RAR and ZIP files. Compatible with many other file formats.