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File conversion

Convert MDX to MDF

Verified by Adam B.· reviewed by FE Editorial ·updated Jul 14, 2026
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Is it possible to convert MDX to MDF?
Yes - MDX converts to MDF.

Use DAEMON Tools (free Lite edition or any paid version) or UltraISO to open the .mdx and save it in MDF/MDS format. The result is two files - a .mdf and a .mds - both of which are needed to use the image.

Also to MDF: SDF · CCD · ISZ

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Tested on macOS, Windows & Linux
Last verified Oct 2026

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Why convert MDX to MDF?

MDX was created by DAEMON Tools around 2009 specifically to replace the older two-file .mdf + .mds scheme by combining raw sector data and track layout into one file. Converting back is only necessary when a legacy burning tool or disc manager requires the .mdf + .mds pair and has not been updated to handle .mdx or ISO.

How to convert MDX to MDF

DAEMON Tools FREE

Right-click the .mdx in DAEMON Tools' image catalog, choose Convert or Export image, and select MDF/MDS as the output format. The free Lite edition supports this.

UltraISO APP

Open the .mdx via File > Open, then go to File > Save As (or Tools > Convert) and choose Media Data File (.mdf) as the output format.

About these formats

.MDX Media Data eXtended image file (DAEMON Tools disc image)

An MDX file is DAEMON Tools' "Media Data eXtended" disc image - a single-file replacement for the older .mdf + .mds pair. Mount it with the free DAEMON Tools Lite and Windows treats it like…

Open .MDX details →
.MDF Media Descriptor File (Alcohol 120% / DAEMON Tools disc image)

An MDF file (Media Descriptor File) is a raw disc image created by Alcohol 120% or DAEMON Tools, storing a bit-for-bit copy of a CD or DVD. Always paired with a companion .mds file, it…

Open .MDF details →

Quality & what to watch

  • The resulting .mdf does not mount natively in Windows - you still need DAEMON Tools or a similar virtual drive program to use it, unlike ISO which mounts by double-clicking.
  • An .mdx contains what the old .mdf (raw sector data) and .mds (track/layout metadata) held together; splitting back produces no data loss.
  • If broad compatibility is the goal, converting to ISO rather than MDF is the more practical choice - ISO mounts natively on Windows, macOS, and Linux.

Frequently asked questions

Do I need both the .mdf and the .mds file?
Yes - the .mds holds the track layout and header metadata; without it, most tools cannot correctly read the .mdf.
Can DAEMON Tools Lite do this conversion?
Yes - the free Lite edition includes image conversion; the paid editions (Pro, Ultra) also work.
Is there any free online tool for MDX to MDF?
No - the format is too niche and requires disc-image parsing that browser-based tools do not implement.