Program to calculate and verify checksums of files downloaded from the internet. Supports major checksum types: CRC32, MD4, MD5, SHA1, SHA-256, SHA-384, SHA-512, RIPEMD-128, RIPEMD-160, HAVAL 256, TIGER 192. Portable version - no installer, just one file. Has simple, intuitive interface with fireworks. File Checksum Verifier (FCV) supports drag and drop function and can create checksum verification file (program.exe.md5, movie.avi.sha512) and is highly customizable: can save window position, support keyboard shortcuts and makes use of Windows clipboard - copy/paste checksum from/to clipboard and can also auto-paste checksum and automatically compare them, might stay on top on other windows, can be rolled-up to mini bar, show checksum in upper or lowercase and optionally can be integrated with Windows Explorer context menu. Can create history file of all calculated files. Moreover, this application provides support for users with vision difficulties (vision impairment) - respects skins and color schemas. Application is ideal for portable USB drives.