File Encryption is a free portable file encryption utility that allows you to protect your files, documents, and personal data from unauthorized access. This lightweight open source tool works by transforming your information into a scrambled, unreadable format using strong encryption methods. Anyone attempting to open your protected files without the correct password will only see encrypted, inaccessible data, making it a reliable solution for users who want a simple USB file encryption tool for secure storage on flash drives and external devices.
Encrypted files can only be decrypted using the same software along with the password you originally set. This ensures that only trusted users can restore the information back to its normal readable form. Because the program focuses on fast encrypting and decrypting of files, it is ideal for everyday tasks like protecting sensitive documents, financial records, work files, or personal information that you carry between computers.
This tool also has a very small footprint (only around 860KB when unpacked) making it one of the most lightweight encryption software options available. Its tiny size allows you to keep it on almost any USB flash drive, providing a convenient way to password-protect files on the go. Whether you're working from different Windows computers or simply want an easy-to-use free file encryption solution you can carry in your pocket, this portable encryption utility offers fast, secure protection without installation.
File Encryption: Encrypting and Decrypting Tool

Author's Website: Project Page
License: Open Source
Downloading: You can get this Free Encryption and Decryption tool here:
File Encryption Download
Why Use Portable Encryption?
Portable encryption software gives you the ability to secure files stored on USB drives, external hard drives, cloud-synced folders, or other removable media without installing anything on the host computer. Many users prefer a Windows portable encryption utility they can launch instantly, especially when dealing with personal or sensitive data in shared or public environments. Because this tool is open source and extremely lightweight, it offers a trustworthy and efficient way to protect your files while traveling, working remotely, or exchanging data between multiple systems.
Key Features
- Strong password based encryption to secure sensitive and personal files.
- Fast encrypt/decrypt workflow for quick daily use.
- Portable and USB friendly with no installation required.
- Open Source transparency for added trust.
- Very small footprint—about 860KB unpacked.
- Ideal for USB flash drives, external drives, and cloud folders.
Final Thoughts
If you need a dependable and free portable file encryption tool for protecting documents across different computers, this lightweight open source utility is a solid choice. It works well as a USB file encryption solution, offering quick encrypting and decrypting, compatibility with any Windows machine, and a simple interface suitable for beginners. Whether you want to password protect files on a flash drive, secure personal data while traveling, or use a lightweight encryption tool without installation, this program delivers fast and effective protection.