Fcrypt

fcrypt — lightweight file encryption and decryption tool for Windows.

fcrypt lets you encrypt and decrypt files locally using a symmetric key (password). It’s designed for simplicity and ease of use, not as a replacement for production‑grade security libraries. Use at your own risk.

Features

• Encrypt single files with a password.
• Decrypt files previously encrypted by fcrypt.
• Built with C/CMake for Windows.
• Libsodium for safe crypto.

Contents

.
├── src/                # Source code
├── include/            # Headers
├── CMakeLists.txt      # Build script
├── build.bat           # Windows build helper
├── README.md           # This document
├── LICENSE             # MIT License
└── vcpkg.json          # Vcpkg manifest for libsodium

Building

Requirements

• Windows (tested with Windows 10/11)
• Visual Studio (MSVC toolchain)
• CMake 3.10+

Build

.\build.bat

After building you should have a fcrypt.exe in the build output.

Usage

fcrypt <command> <input-files>
fcrypt --version
fcrypt --help

Commands

Command	Description
encrypt	Encrypt input files
decrypt	Decrypt input files