All about SL2 Files

The SL2 file type is primarily associated with Elden Ring.

SL2	File extension: SL2
	File type:	Game save file

What is an SL2 file

SL2 files mostly belong to Elden Ring.

This SL2 file has two distinct uses.
FromSoftware Save File: The most common use is as a game archive for Elden Ring. The file stores game progress like player state, inventory, and environment details in a proprietary binary format. It is managed by the game and should not be opened or modified manually. For more on this, check out the Elden Ring official page.

Sonar Log File: A smaller group of SL2 files is used to record sonar data. These files work with software such as SonarLogViewer by Lowrance. They store readings from sonar devices in a specialized format designed for analysis.

Key details as outlined by FilExt.com include:

Game Archive: Holds save data for Elden Ring.

Sonar Log: Contains data captured from sonar systems.

FilExt.com note: To open a game save, launch Elden Ring. To view sonar logs, use the dedicated sonar analysis tools provided by Lowrance or SonarLogViewer.

How can I open an SL2 file?

You need a suitable software like Elden Ring to open an SL2 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 SL2 file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a SL2 file directly in the browser:. Just drag the file onto this browser window and drop it.

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Programs that open and convert SL2 files:

Elden Ring
See the previous paragraphs to learn more about the main application. SL2 files are often referred to as Elden Ring games because this type of file is primarily created or used by this software.
Elden Ring, SonarLogViewer
The *.SL2 file extension is primarily associated with saved game data from FromSoftware titles, most notably Elden Ring. These files store player progress, including character stats, inventory, and world state. FromSoftware utilizes a proprietary format for these save files, making them inaccessible without specialized tools or modifications. A smaller portion of *.SL2 files represents sonar log data used by Lowrance sonar devices. These files contain detailed underwater information captured by the sonar system, viewable with compatible software like SonarLogViewer. The distinct usage of the *.SL2 extension necessitates identifying the originating software to determine the file's true nature. This file format is classified as Game Data or Sonar Data.

SL2 file format details:

If you know the file format, you can also find out how to open or edit the file. The file format can be deduced from the file extension and the signature. Frequently, however, one file extension is used by different programs for different file formats, and one file format for different file extensions. So you need a detailed analysis of a file to find out the format and the associated program. Our analysis of the SL2 files produces the following result:

You will often come across the SL2 file type. This is mainly used by one program with a specific format. However, the following two file formats are common:

80% of all SL2 files start with the magic bytes BND4, which are always the first bytes of this file format. These are binary files, so they do not contain words or text. SL2 files are between 4 MB and 28 MB in size. The file type is relatively new. Several words can almost always be found in the files, e.g. BND4 and 00000001. A usual file name is ER0000.sl2 or DS30000.sl2. These files are attributed to draks, sofs, roaming, data, elden, ring, darksii and nightreign.
6% of all SL2 files use the same file format, which can be identified by the letters "02 00" at the beginning. The contents of these files cannot be read by a human; only a computer program can interpret the data. The file size is in the range of 2 MB to 150 MB. A usual file name is Sonar_2020-06-01 10.30.sl2. These files can be linked to chart.

All other SL2 files (14%) have no uniform format. These files are often connected to sekiro or system. If you want to find out what your SL2 file contains, drag and drop it onto this page.

Technical Data for SL2 File Extension

File classification:

Game

Related files:

sl3, s12, ls2, sl, hxd, s2, bak, save, bnd, rgd, srm, sav, dat, bin, log

an sl2 Game save file is a special file format and should only be edited and saved with the appropriate software.

How to solve problems with SL2 files

Associate the SL2 file extension with the correct application.
Update your software that should actually open game save files. Because only the current version supports the latest SL2 file format. Search, therefore, e.g. on the manufacturer website after an available Elden Ring update.
To make sure that your SL2 file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
Click here to open your .SL2 file online - secure, fast, and no downloads needed.