Opening an NSM File

The NSM file type is primarily associated with NESticle.

NSM	File extension: NSM
	File type:	Movie

What is an NSM file?

NSM files mostly belong to NESticle. NESticle is one of the most popular DOS/Win95 based emulator for the Nintendo Entertainment System written in C++/Assembly. It is freeware and it is not to be distributed with game ROMs.

How can I open an NSM file?

You need a suitable software like NESticle to open an NSM file. You need a suitable software like NESticle to open an NSM file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your NSM file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a NSM file directly in the browser:. Just drag the file onto this browser window and drop it.

Online NSM Text Viewer

Choose your .nsm file to analyze

or drag and drop it here

Online File Viewer

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Unable to Open a .NSM File? Quick Solutions:

NSM files can originate from various programs and aren't universally openable.

Identify the Source: If received from a retro gaming enthusiast, it is likely a NESticle Movie file. If it comes from an enterprise IT environment, it may relate to Juniper NetScreen Security Manager.
Check the Header: Inspect the first few bytes in a text editor or hex viewer.
- Emulator-specific magic bytes or raw binary suggest a gameplay recording.
- Readable text or XML implies a configuration or log file.
Use the Original Software: The original program is usually required to open the file properly. Try NESticle for emulator movies, or ask the sender if you are uncertain.
Use this Webpage: Drag and drop your file into our viewer to detect the format, extract readable text/metadata, and preview when possible.

Technical Data for NSM File Extension

Related files:

nusm, dvx, 3mm, moov

Related links:

Movie Archive, NESticle Shrine

an nsm Movie is a special file format and should only be edited and saved with the appropriate software.

How to solve problems with NSM files

Associate the NSM file extension with the correct application.
Update your software that should actually open movies. Because only the current version supports the latest NSM file format. Search, therefore, e.g. on the manufacturer website after an available NESticle update.
To make sure that your NSM file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
Click here to open your .NSM file online - secure, fast, and no downloads needed.