Opening an MW0 File

The MW0 file type is primarily associated with Super Mario World.

MW0	File extension: MW0
	File type:	Super Mario World files

What is an MW0 file?

MW0 files mostly belong to Super Mario World by Nintendo. Super Mario World (commonly abbreviated SMW) is a platform game developed and published by Nintendo Co., Ltd. For the Super Famicom/Super Nintendo Entertainment System. ROM hackers will often use tools like Lunar Magic to edit levels or add new levels to the game. Version 1.60 of Lunar Magic uses only one .MWL file; prior versions required *.MWL, *.MW0, *.MW1, *.MW2, and *.MW3 files.

How to open an MW0 file

You need a suitable software like Super Mario World to open an MW0 file. You need a suitable software like Super Mario World from Nintendo to open an MW0 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 MW0 file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a MW0 file directly in the browser:. Just drag the file onto this browser window and drop it.

Online MW0 Text Viewer

Choose your .mw0 file to analyze

or drag and drop it here

Online File Viewer

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Unable to Open a .MW0 File? Quick Solutions:

Because .MW0 files can originate from different programs, they aren't universally openable.

Identify the Source: If received from retro gamers, it's likely a Super Mario World file; if from developers, it may be a project file.
Check the Header: Open the file in a hex viewer to inspect its first bytes:
- "PK" indicates a ZIP archive.
- Readable XML/JSON suggests a configuration file.
- Unreadable binary data often points to an emulator save state.
Use the Original Software: The original program is usually required; try Super Mario World emulators (like ZSNES), Nintendo tools, or ask the sender if uncertain.
Use this Webpage: Drag and drop your .MW0 file onto this webpage to detect its format, extract readable text/metadata, and preview when possible.

Technical Data for MW0 File Extension

Related files:

mw3, bmd, szs

an mw0 Super Mario World file is a special file format by Nintendo and should only be edited and saved with the appropriate software.

How to solve problems with MW0 files

Associate the MW0 file extension with the correct application.
Update your software that should actually open Super Mario World files. Because only the current version supports the latest MW0 file format. Search, therefore, e.g. on the Nintendo manufacturer website after an available Super Mario World update.
To make sure that your MW0 file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
Click here to open your .MW0 file online - secure, fast, and no downloads needed.