OSFMount is a free Windows utility that allows users to mount disk image files as virtual drives or RAM disks. It supports a wide range of image formats, including ISO, IMG, NRG, VMDK, and VHD, and enables both read-only and read/write access. The tool is commonly used for disk image analysis, software testing, and high-speed data access tasks. OSFMount also features the ability to create RAM disks, which store data in system memory for increased speed and security, as data is not persistent after shutdown. The software is compatible with modern 64-bit Windows systems and is primarily aimed at users needing to work with disk images for forensic analysis, backup, or performance-sensitive applications.

Key Features

Mount Disk Images Mount local disk image files as physical disks or logical drive letters in Windows.

• Supports formats: IMG, DD, ISO, BIN, NRG, SDI, AFF, AFM, AFD, VMDK, E01, S01, VHD
• Access images as if they were physical drives

Read-Only and Read/Write Modes Choose between read-only or write-cache (read/write) mounting.

• Protects original image integrity
• Write-cache mode stores changes in a separate file

RAM Disk Creation Create virtual disks in system RAM for high-speed access.

• Ideal for cache, temporary files, or high-performance applications
• Data is non-persistent after shutdown

Wide Format Compatibility Mounts a broad range of disk image formats.

• Useful for digital forensics, legacy software, and backup testing
• Supports multiple images mounted simultaneously

Command Line Support Automate mounting and unmounting tasks.

• Integrate with scripts and workflows
• Suitable for advanced users and automation

File System Support Works with FAT, FAT32, NTFS, ext2, ext3, and ext4 file systems.

• Flexible for various use cases and environments

Benefits

Fast Data Access Significantly improves data access speeds, especially with RAM disks.

• Suitable for performance-critical applications
• Reduces latency for temporary and cache files

Data Integrity and Security Prevents accidental modification of original disk images.

• Read-only mode ensures data remains unchanged
• RAM disks offer non-persistent storage for sensitive data

Versatile Usage Supports a wide range of professional and technical scenarios.

• Useful for digital forensics, IT administration, and software testing
• Facilitates access to archived or legacy data