UDI Converter

Extract text from Disk images or DVD projects (UDI)

Select File
Drop or upload your .UDI file

Online File Converter

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How to extract text from your UDI file

Click the "Select File" button above, and choose your UDI file.
You’ll see a preview, if available.
Click the "Convert file to..." button to extract text information.

Convert UDI to another file type

To convert UDI Files to another format, you need UnrealSpeccy or other Disk Image software.

Convert a file to UDI

To convert other file formats to the "Floppy Disk Dump" file type, you need software like UnrealSpeccy or a similar tool.

About UDI files

The .UDI extension represents a split in digital history, serving two completely unrelated communities. In the realm of retro computing, it stands for Universal Disk Image, a format used to preserve exact bit-perfect copies of ZX Spectrum floppy disks (specifically for the TR-DOS system). These files are critical for archivists because they capture low-level track data, including copy protection schemes that standard TRD or DSK files might miss.

However, a majority of users encountering this file today have stumbled upon a Dazzle DVD Complete project file. These are not video files; they are XML-based lists of instructions (references to video clips, menu layouts, and burn settings) created by legacy Pinnacle/Corel software. You cannot upload a Dazzle .UDI to YouTube or play it in VLC Media Player.

Common Friction Points:

The "Fake" Video: Users often try to convert Dazzle .UDI files to MP4, failing because the file contains no actual video data - only file paths pointing to media that may no longer exist on your hard drive.
Emulation Complexity: For Spectrum users, .UDI files require specific emulators like UnrealSpeccy or highly accurate floppy drive emulators (like FlashFloppy on Gotek hardware) to run. Standard emulators often prefer the simpler SCL or TAP formats.

Best Conversion Targets:

For Retro Gaming: Convert .UDI to TRD (TR-DOS Disk) or SCL (Beta Disk) if your emulator struggles with the raw UDI format. These are lighter and more widely supported by web-based emulators.
For DVD Projects: You must locate the original Dazzle DVD Complete software (now discontinued) to open the project and "Render" or "Export" the timeline to ISO or .MPEG-2.

Convert.Guru analyzes your UDI file, detects the exact format, and lets you read the text inside.

Users also converted NPM, CIK and CW_ files.

FAQ

If you want to convert UDI file to , you can use UnrealSpeccy or similar software from the "Retro Computing Disk Image" category. In the File menu, look for Save As… or Export….

To convert files to UDI, try UnrealSpeccy or another comparable tool in the "Retro Computing Disk Image" category.

The UDI 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 UDI converter.