Try fenc, developed by Ravi Bhushan, to encrypt and decrypt individual files on Windows with a compact utility that targets local data protection. The tool performs single-file AES-256 encryption and password-based key derivation from the command line, supporting any file type without external dependencies. It ships as a portable executable, and is aimed at power users, system administrators, and developers who need an auditable, scriptable method to secure files.

What does fenc do?

fenc is a single-purpose file encrypter and decrypter that applies AES-256 encryption to individual files via a command-line interface. It accepts any file extension, uses password-based key derivation for access control, and runs as a portable executable so no installer or external libraries are required. The tool also compiles from C++ sources for other platforms, which supports embedding it into custom workflows.

Does it affect system resources when running?

The tool keeps a minimal runtime footprint, described as an extremely low system resource footprint compared with full-suite encryption software. In practice, the portable, dependency-free design reduces overhead during file operations and makes background or batch processing practical. In addition, its simplicity makes it convenient to call from scripts without adding long-running services to the desktop environment.

Is fenc safe to use on production machines?

Security is anchored in standard cryptography and transparency: AES-256 is the chosen cipher and password-based key derivation protects access. The project is open source, which allows code inspection and auditability. There is no recovery backdoor if a password is lost, so operational procedures must account for secure password management before applying encryption.

Do I need technical knowledge to operate it correctly?

This tool targets command-line users and automation scenarios. It lacks a graphical interface and is intended for power users, system administrators, and developers who integrate it into scripts or batch jobs. Casual users should archive folders into a single file before encrypting, since fenc handles individual files only; following that workflow keeps the process straightforward for scripted deployments.

Practical choice for technical users who accept a CLI-only workflow

fenc is a practical option for technical users who need straightforward, auditable file encryption without installation overhead. Its open-source, portable design and AES-256 basis suit scripted and administrative workflows. The main limitation is the command-line orientation, which constrains adoption by non-technical users who prefer graphical tools or integrated folder-level encryption.