To convert an MDF file to ISO with WinBin2Iso, extract the WinBin2Iso ZIP, open the program, pick your .mdf file as the source, pick an ISO file name and folder as the destination, and press Convert. When it finishes, mount the ISO in File Explorer to check that the files are there. WinBin2Iso handles MDF files as well as BIN files, so you do not need a different converter for a standard MDF image.
MDF is a disc image format most often seen alongside an MDS file. The MDS file is a small descriptor that describes the layout of the disc, while the MDF file holds the bulk of the data. WinBin2Iso works from the MDF file itself for conversion to ISO. Keep the MDS file with your originals until you have verified the new ISO, even though you do not need to select it as the conversion source. A fuller explanation is in MDF and MDS explained.
As with BIN conversion, WinBin2Iso is a free, portable Windows tool by Nenad Hrg and SoftwareOK. The latest version is v6.79, released on 19 October 2026. There is no installer, no Mac or Linux version, and no Android version. Get the current version from the WinBin2Iso download page, extract the ZIP to a normal folder, and run the program from there.
Step-by-step: MDF to ISO
- Extract WinBin2Iso. Right-click the downloaded ZIP, choose Extract All, and open the extracted folder. Do not run the program from inside the ZIP preview. If you see a run-from-ZIP error, close the program and extract properly first.
- Open WinBin2Iso. Double-click the program file. Accept the license screen on first run on that PC. The program does not install anything.
- Pick the MDF source. Use the browse button to select your .mdf file. If your MDF file is in a folder with its .mds partner file, that is fine. You are selecting the MDF file as the source, and the MDS file stays untouched in the original folder.
- Pick the ISO destination. Choose a folder with enough free space and type a clear name ending in .iso. Do not overwrite the original MDF file, and avoid a destination that is still uploading to cloud sync if you can.
- Press Convert and wait. Let the conversion finish without closing the program, sleeping the PC, or unplugging the drive. Large images take longer, and interrupting the write is a common cause of a damaged ISO.
- Mount and check the ISO. Right-click the ISO in File Explorer, choose Mount, open the new drive, and check the folders and files. Eject the drive when you are done. See how to mount an ISO on Windows 11 for the full steps.
What about the MDS file?
The MDS file matters most when you mount or burn the original MDF image with a tool that uses the pair together. For conversion to ISO with WinBin2Iso, the honest position is this: pick the MDF file, convert it, and then verify the ISO. If the ISO mounts and its contents look complete, the conversion has served its purpose for a data disc. If the ISO is empty, will not mount, or is missing files you expected, keep the original MDF and MDS pair and do not delete them. Check first that the conversion finished without an error, that the source MDF was not still downloading or on a failing drive, and that the destination had enough free space.
Some MDF images are unusual: they may come from copy-protected discs, mixed-mode discs, or discs with several sessions. Conversion to a single ISO can lose features that only make sense in the original format. If the disc is a data disc, ISO is usually a practical target. If it is an audio CD image, the same warning applies as for BIN files: converting a multi-track audio image to a single ISO can lose track structure, so keeping the original pair or mounting it is often safer. The audio guide at audio CD BIN to ISO and lost tracks explains the trade-off, and the same idea applies to MDF audio images.
If only the MDS file, or only the MDF file, is present
If you have both files, you are in the normal case: convert the MDF and keep both originals until verified. If you have only an MDS file and no MDF file, you do not have the disc data itself, and conversion cannot recreate it. You need the MDF file that the MDS describes. If you have only an MDF file and no MDS file, try the conversion anyway for a data disc, then verify carefully by mounting the ISO and checking its contents. If verification fails, the missing descriptor may be part of the problem, and you should look for the original complete pair rather than converting the same incomplete file again.
FAQ
Do I need to select the MDS file in WinBin2Iso? No. Select the MDF file as the source. Keep the MDS file with your originals until you have verified the ISO, because it describes the original disc layout.
Will converting MDF to ISO lose data? For a normal data disc, the files inside should survive conversion. Conversion changes the container format, so features that depend on the original raw layout, copy protection, or multi-session structure may not carry over. Verify by mounting the ISO.
What if my MDF file is very large? Files over 2 GB are supported. Make sure the destination drive has enough free space and that you do not interrupt the conversion.
Can I delete the MDF after conversion? Only after you have mounted the ISO and confirmed its contents. Until then, the original pair is your safety copy if the ISO turns out to be incomplete.