Opening an OSU File

The OSU file type is primarily associated with osu!.

OSU	File extension: OSU
	File type:	Rhythm game beatmap

What is an OSU file?

OSU files mostly belong to osu!. An .OSU file stores a beatmap for the rhythm game osu!. It defines the circles, sliders, and spinners that the player must hit in time with the music, as well as the timing and difficulty settings. The internal structure of .OSU files is a custom format specific to the game, containing sections for general information, editor settings, metadata, difficulty settings, timing points, hit objects, and events. These files are primarily used by the osu! game client to load and play beatmaps. They are created using the osu! editor or downloaded from online repositories. The vast majority of .OSU files represent beatmaps for the game.

How do you open OSU files?

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

Online OSU Text Viewer

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Online File Viewer

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Unable to Open a .OSU File? Quick Solutions:

OSU files can come from different programs and aren't universally openable.

Identify the Source: These files are usually rhythm game beatmaps shared by players or gaming communities, strongly suggesting they belong to the game osu!.
Check the Header: Open the file in a text editor to inspect its opening lines.
- Seeing osu file format confirms it is a standard osu! beatmap script.
- Seeing "PK" or garbled characters implies a compressed archive.
Use the Original Software: The original program is usually required; try using osu!, osu!lazer, or a beatmap editor. If uncertain, ask the sender.
Use this Webpage: Drag and drop the file into our viewer to detect the format, extract readable text/metadata, and preview when possible.

Technical Data for OSU File Extension

File classification:

Game Data

Related files:

osz, osk, osr

Mime type:

text/plain

an osu Rhythm game beatmap is a special file format and should only be edited and saved with the appropriate software.

How to solve problems with OSU files

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