Click the "Select File" button above, and choose your HD file.
You’ll see a preview, if available.
Click the "Convert file to..." button to extract text information.
Convert HD to another file type
To convert HD Firmware and assets to another format, you need HP Smart or other System software.
Convert a file to HD
To convert other file formats to the "Firmware Update File" file type, you need software like HP Smart or a similar tool.
About HD files
The .hd file extension is primarily used as a Printer Firmware Update file by hardware manufacturers like HP and Pantum. These files contain low-level machine code designed to flash the ROM of a printer, fixing software bugs or adding new networking features. Secondarily, .hd files act as UnityFS game asset bundles in video games built with the Unity Engine, or as Ground Penetrating Radar (GPR) data headers in scientific systems. The biggest disadvantage of a .hd firmware file is its proprietary, closed nature. It is heavily compiled and often encrypted. You cannot open it in a standard text editor. You cannot easily modify the update package. If you try, you risk breaking the digital signature, which will brick the device. For Unity developers, these files lock away valuable 3D models and textures behind a closed archive system, requiring specialized asset extractors. Converting a .hd firmware file directly to a readable document format like PDF or DOCX is impossible. The data is machine code, not human text. However, users often need to extract the archive to access the underlying BIN or ROM files. For Unity game assets, extracting the contents to standard formats like OBJ for 3D models or PNG for textures is a common workflow. This file format is exceptionally difficult to open or convert because it lacks an open standard. Standard online converters fail to process .hd files because they do not have the specific decryption keys or parsing logic for HP printers or Unity archives. Often, only the original hardware flasher or game engine can properly read the data. If our analysis detects a supported underlying or embedded format, viewing or conversion may still be possible.
Convert.Guru analyzes your HD file, detects the exact format, and lets you read the text inside.
If you want to convert HD file to MP4, JPG, MP3, VHDX, GPT, ISO, IMG, DMG, VHD, VMDK, VDI or HDD, you can use HP Smart or similar software from the "Printer Firmware Update" category. In the File menu, look for Save As… or Export….
To convert VFD, DMG, OVA, IMA, VBOX, ADF, PVS, VHD, OVF, ISO, DSK or IMG files to HD, try HP Smart or another comparable tool in the "Printer Firmware Update" category.
The HD 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 HD converter.