How to extract text from your HDI file
- Click the "Select File" button above, and choose your HDI file.
- You’ll see a preview, if available.
- Click the "Convert file to..." button to extract text information.
Convert HDI to another file type
To convert your HDI file to another format, you need Anex86 or other Disk Image software.
- HDI to ISO
- HDI to IMG
- HDI to DMG
- HDI to VHD
- HDI to VMDK
- HDI to VDI
- HDI to HDD
- HDI to QCOW
- HDI to QCOW2
- HDI to RAW
- HDI to VBOX
- HDI to OVA
Convert a file to HDI
To convert other file formats to the "Emulation Hard Drive" file type, you need software like Anex86 or a similar tool.
- VFD to HDI
- DMG to HDI
- OVA to HDI
- IMA to HDI
- VBOX to HDI
- ADF to HDI
- PVS to HDI
- VHD to HDI
- OVF to HDI
- ISO to HDI
- DSK to HDI
- IMG to HDI
About HDI files
The .HDI file extension is most frequently associated with Hard Disk Images formatted for the NEC PC-9800 series of computers. These files are containers used by emulators such as Anex86, T98-Next, and Neko Project II to simulate the storage environment of retro Japanese PCs. Unlike standard ISO or IMG files, .HDI files contain a proprietary header that defines the virtual disk geometry (Cylinders, Heads, Sectors), which often makes them unreadable by modern operating systems like Windows or macOS without specific tools. Users typically encounter friction when trying to mount these images to extract game data or old documents, as standard archiving software cannot parse the NEC-specific partition tables. To make the data accessible, the best workflow is to convert the .HDI file into a raw binary format (like IMG) or a Virtual Hard Disk (VHD). This conversion strips the emulator-specific header, allowing the file to be mounted by modern virtualization software or opened with tools like 7-Zip. Less commonly, an .HDI file might be a Heidi Device Interface driver used by AutoCAD for plotter communication, or a template installer for HotDocs. These variants are system-specific and generally should not be converted.
Convert.Guru analyzes your HDI file, detects the exact format, and lets you read the text inside.
Users also converted FDI, ZIP, IMG, AD1 and ISO files.
The HDI Converter Story
The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our HDI converter.