On-the-fly File Encryption SDK for Windows

Used On-the-fly File Encryption SDK for Windows?

Beta or prerelease software is not intended for inexperienced users, as the software may contain bugs or may potentially damage your system. We strongly recommend that users exercise caution and save all mission-critical data before installing or using this software.

Editors’ Review

Download.com staffFebruary 20, 2026

This SDK empowers developers to build transparent file-level encryption solutions. It handles complex kernel-mode operations, simplifying integration and accelerating product delivery.

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Trial version

Pros
- Supports file-level encryption with unique passwords per file.
- Enables distinct encryption rules for files and directories.
- Automates encryption for new files in designated directories.
- Allows customization with custom crypto algorithms.
- Compatible with all major file systems and Windows OS versions.
Cons
- Developers must implement their own encryption/decryption routines.
- Requires development of custom crypto providers.
- Does not include built-in encryption algorithms.