Win Subst

Win Subst is a free tool for Windows to substitute a drive letter to a local folder on the same computer, just like the old DOS subst command. For example, you could use Win Subst to map your Google Drive folder stored at C:\Users\[your name]\Google Drive to a drive letter like S:\. Whenever you click on the S:\ drive in the Windows Explorer or My Computer you would actually be redirected to the Google Drive folder and you can view or modify all files and folders as they where stored on drive S:\. This can be useful in so many different situations, it allows you for example quick access to files that are stored deeply on your computers hard-drive. Also it can help you to overcome limitations when working with paths that are longer than 256 characters.

Win Subst: Application interface


Win Subst is released as freeware (not as free or open source software). Win Subst contains no advertisement, in-app purchases, hidden fees, or disabled functionality. The usage of Win Subst is licensed to you for free in accordance with the terms and conditions as described in our End User License Agreement (EULA).

Virtual Drives

A virtual drive is a software component that emulates an actual disk drive. To other programs, a virtual drive looks and behaves like an actual physical device. Virtual drives created with Win Subst are system wide available for all programs as long as Win Subst is active. Closing Win Subst will automatically disconnect all virtual drives. Please note that Windows will also automatically disconnect all virtual drives when ending your Windows session (log off / shutdown / restart).

No installation

Win Subst is designed for usage without installation. For using Win Subst all you have to do is unzip the downloaded file and double click the Winsubst.exe executable.

Drag and Drop

Win Subst supports drag and drop both individual folders and project files from the Windows Explorer.

Project files

Substituted drives can be saved in Win Subst project files for easy access each time you continue working on your computer. Project files can be opened by drag and drop or opened through the Tools menu.

Win Subst: Import/export project files

Virtual drive detection

Win Subst automatically detects already substituted drives each time you run Win Subst. Found substituted drives will be added to the Win Subst interface.

System tray

Win Subst can minimise to the system tray. By minimising the program to the system tray Win Subst is no longer visible on the screen. To restore Win Subst from the system tray simply click on the Win Subst tray icon.

Win Subst: System tray icon

Auto Start

Win Subst can automatically run at every startup by simply selecting the Auto Start after logon option in the Settings menu. Win Subst will automatically minimise to the system tray after restoring substituted drives. As you will understand this only works if the Win Subst program is located on a drive and folder that is available/accessible when the user logs in.

Win Subst: Enable Auto Start

Auto restore

Win Subst will store all configuration settings and substituted drives in the registry (HKEY_CURRENT_USER) when the program closes. At startup it will restore all configuration settings and substituted drives automatically.

Issues and limitations

Win Subst v1.1x is still in development. The short list below shows currently known issues and limitations:

  • Win Subst does not support mapping of network shares.
  • 32 bit Windows (x86) is not supported.
  • Support for obsolete Windows versions like XP, NT4, 2000 and Vista will not be implemented.

Download Win Subst

Win Subst is available for download as a “ZIP” archive. Unzip Win Subst to any folder you prefer using the build-in Windows decompressor or a free archiver tool like 7-ZIP. Double click “WinSubst.exe” after extracting the ZIP archive to run Win Subst.

Version: 1.1.4
License: Freeware (EULA)
Document format: ZIP archive
File size: 1.25 MB
Release date: 2020-03-06
Downloads: 11174
Platform: Windows x64
MD5 Hash: 042c41648a71b3c23283e7013307caea
SHA1 Hash: 5df2439b73a4c3efa74c82c774b659229caeb5e0
SHA256 Hash: 0b76e6b36345908d43af6966e36d18a449807796184fcbd17d8866a222376764

To verify the integrity of the “Win Subst 1.1.4” ZIP archive check the MD5, SHA-1 or SHA-256 checksum after download by using a Hash calculator. See our Windows built-in MD5 and SHA checksum calculator page for how to use the default Windows hash calculators. If you prefer to use a tool with a Graphical User Interface please take a look at Hash Tool, available for free in the Microsoft Store.


Win Subst is distributed as freeware. However, if you wish to express your appreciation for the time and resources we have spent developing and supporting it and help support the costs for our development tools we give you the possibility to make a small donation.

If you wish to make a donation, simply click on the PayPal “Donate” button. You don’t need to have a PayPal account, you can use any bank card when you select bank card as payment method.

No warranties

Win Subst is provided “As Is”, without warranty of any kind, express or implied, including but not limited to the warranties of merchantability, fitness for a particular purpose and noninfringement. In no event shall the authors or copyright holders be liable for any claim, damages or other liability, whether in an action of contract, tort or otherwise, arising from, out of or in connection with the software or the use or other dealings in the software.

In no event does No Nonsens inc. authorise the use of “Win Subst” in applications or systems where “Win Subst” failure to perform can reasonably be expected to result in a significant physical injury, or in loss of life. Any such use by you is entirely at your own risk, and you agree to hold No Nonsens inc. harmless from any claims or losses relating to such unauthorised use.

Read more about terms and conditions in our End User License Agreement (EULA).


We are excited to hear your thoughts about Win Subst. If you have a question, need support or if you have a request about Win Subst just let us know by using the “leave a reply fields” below. If you prefer to contact us privately please use our contact form.

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