What is a FLKB file?
A .FLKB file is a Folder Lock Basic Locker File created by the security software Folder Lock, developed by NewSoftwares. These files act as secure, encrypted digital vaults designed to protect personal and sensitive data. When you lock a folder using the software, the contents are packaged into a single .FLKB file, which requires a master password to unlock. Because they use an NTFS file system structure, they can store an unlimited amount of data, making them ideal for heavy local backups.
How to open FLKB files?
Normally, the only way to open a .FLKB archive is by installing Folder Lock on a Windows computer and entering the correct locker password. Without this specific software, attempting to open the file will result in an unrecognized format error. Portable lockers often use the .FLKA format, while the standard local vaults rely on .FLKB.
If you stumble upon an unknown .FLKB file and do not have the native software installed, you can use viewer.online/flkb. While our tool respects the encryption and cannot bypass password protection, it can safely analyze the file header, confirm the exact creator software, and extract any available readable metadata.
Best practices and troubleshooting
A common frustration is moving a .FLKB file to a Mac, Linux, or mobile device, only to find it cannot be opened. The native software is primarily built for Windows environments. Furthermore, if the file becomes corrupted during a transfer or incomplete download, the original software might fail to mount the locker.
Always ensure your backups are completely synced before moving them. If a file refuses to mount, use viewer.online/flkb to inspect the file structure and verify whether the container is intact or structurally damaged.
Software and tools
The dominant application for these encrypted containers is Folder Lock by NewSoftwares. It handles the creation, mounting, and decryption of the locker. Older legacy versions of the software used the .FLK extension, while version 7 introduced the newer .FLKB and .FLKA formats.
Summary
Understanding and managing proprietary encrypted backups can be frustrating, especially on unsupported devices. Using viewer.online/flkb is a fast and secure way to identify, inspect, and understand your .FLKB files without installing software or dealing with compatibility problems. If you are unsure about the exact format of your file, viewer.online/flkb is the perfect tool to identify it.