Opening an NRO File

The NRO file type is primarily associated with Nintendo Switch OS.

NRO	File extension: NRO
	File type:	executable

What is an NRO file?

NRO files mostly belong to Nintendo Switch OS. NRO files are Nintendo Switch executables that run on the Nintendo Switch operating system. They contain compiled binary code along with a custom header that tells the system how to load the app.
These files are built with tools such as devkitPro and libnx and are meant for use in homebrew or third‐party software. For instance, a supported launcher on a modded Nintendo Switch reads the header, loads the code into memory, and starts execution.
Key details summarized by FilExt.com include:

Designed specifically for Nintendo Switch hardware and firmware.

Not compatible with standard PC operating systems.

Often used in homebrew development and testing scenarios.

Require a special environment (modded Switch or emulator) to run properly.

FilExt.com tip: On a PC, if you open the file with a hex editor, you will see binary data and the unique header, but it cannot be executed.

How to open an NRO file

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

Online NRO Text Viewer

Choose your .nro file to analyze

or drag and drop it here

Online File Viewer

✈

Read our privacy guarantee in Filext’s terms and privacy policy

Please allow ads on our site

This helps us keep our servers running. Then re-upload your file to view it.

Click here to see how to disable the ad blocker for filext.com

NRO file format:

A file format defines how the data in the file is structured. Often, the file format can be deduced from the file extension or the initial bytes (called the signature). However, different programs can use the same file extension, and file extensions can be assigned incorrectly. So you need a detailed analysis of a file to find out the format and the associated program. In the following you will find our evaluation of the NRO files:

The NRO file extension mainly uses a defined NRO format. The file formats most commonly found in NRO files are:

• 75% of all NRO files use the same file format, which have the signature 20 00 00 14. The contents of these files cannot be read by a human; only a computer program can interpret the data. The files are 810 KB to 17 MB in size, with a median of 8 MB. It is a modern file type. The keywords HOMEBREWNRO0 are typical for these files. The following filename is common: DBI.nro. These files can be linked to installer, drawing, switch, awoo, hbmenu, jksv, goldleaf and tico.
• 20% of all NRO files use the same file format, which have the signature 00 00 00 00. The contents of these files cannot be read by a human; only a computer program can interpret the data. The files are 65 KB to 2 MB in size, with a median of 520 KB. The files contain the following words: NRO0. Examples of file names are plugin.nro. These files can be linked to libinput, libcomp, macros, boss and hook.

All other NRO files (5%) have no uniform format, the following 3 formats can be found: NRO. These files sometimes refer to nxthemes, tinfoil, application, nxdumptool, updater or code. You can get all the details of your NRO file by dragging it onto this page or by clicking the button "Choose your .nro file to analyze" above.