Opening an AUTOSAVE File

The AUTOSAVE file type is primarily associated with Simulink.

AUTOSAVE	File extension: AUTOSAVE
	File type:	backup file

What is an AUTOSAVE file?

AUTOSAVE files mostly belong to Simulink. AUTOSAVE files store backup copies of work created automatically by applications. They protect recent data in case of a crash or accidental closure.

Simulink: Uses a ZIP format to pack a backup file. More details at Simulink.

Dia Diagram Editor: Uses a GZIP method for compressing diagram backups. See Dia.

Source Filmmaker: Creates an autosave stored in XML. Visit Valve Software for info.

These files are meant strictly for recovery, not for routine editing. Use the native program to open them and, if needed, change the extension to match the expected file type.
FilExt.com note: The internal format (ZIP, GZIP, or XML) depends on the software’s design for optimal file backup.

How to open AUTOSAVE files

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

Online AUTOSAVE Text Viewer

Choose your .autosave file to analyze

or drag and drop it here

Online File Viewer

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Programs that open and convert AUTOSAVE files:

Simulink
See the previous paragraphs to learn more about the main application. AUTOSAVE files are often referred to as Simulink backups because this type of file is primarily created or used by this software.
various software applications
*.AUTOSAVE files represent automatically saved versions of files created by various software applications. These files serve as backups, allowing users to recover their work in case of unexpected software crashes, system failures, or accidental closures. The internal structure of *.AUTOSAVE files varies depending on the generating application. Some applications store *.AUTOSAVE files as compressed archives (e.g., ZIP, GZIP) containing a snapshot of the file's data at the time of the autosave. Other applications might employ proprietary formats or standard formats like XML to store the autosaved content. The frequency with which *.AUTOSAVE files are created and the location where they are stored are typically configurable within the application's settings. Users can usually disable autosaving or adjust the autosave interval. It's important to note that *.AUTOSAVE files are intended as temporary backups and might not always represent the most recent version of a file if the application crashes before a regular save operation is completed. This file format is classified as backup file.

AUTOSAVE file format details:

The file format, which is the arrangement and type of data in a file, determines which program can open the file. The file format can be deduced from the file extension and the signature. However, different programs can use the same file extension. Furthermore, a file extension can be renamed incorrectly and double-clicking on it will then display an error when it is opened. Exact knowledge of the format is therefore important in order to solve problems occurring in files. Our analysis of the AUTOSAVE files produces the following result:

The AUTOSAVE file extension is not common and is used by a few programs, each with its own file format. The following file formats are most commonly found in AUTOSAVE files:

35% of all AUTOSAVE files use ZIP compression, the AUTOSAVE file contains a number of compressed files. The number of files included is on average 23 and ranges from 5 to 50. Customary file names are [Content_Types].xml, \_rels\.rels, \metadata\coreProperties.xml, \metadata\mwcoreProperties.xml, \metadata\mwcorePropertiesExtension.xml, \simulink\bddefaults.xml, \simulink\blockdiagram.xml and \simulink\configSet1.xml. A little tip: If you rename the file extension to .zip and then double-click, you will see the included files and images. A typical file size is 32 KB. Some examples of file names are untitled.slx.autosave. Such AUTOSAVE files store data about music, mscz and song.
15% of all AUTOSAVE files are using the well-known GZIP file format to store the data. Gzip is a compressed archive file format. Gzip (GNU zip) is only capable of compressing a single file. If you open these files in a text editor, you will see only illegible characters. Most of these files are 2 KB to 19 KB in size. Some examples of file names are Diagram1.dia.autosave. Files like these are about diagrama.

The remaining 50% of all AUTOSAVE files are different files with different signatures, often e.g. XML. Just click the "Choose your .autosave file to analyze" button on this page to find out what your AUTOSAVE file is.

Technical Data for AUTOSAVE File Extension

File classification:

Backup

Related files:

tmp, slx, dia, mdl, dmx, ps4, sla, sfm, song, tga, configs, checksum, bak, zip, gz, xml

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

How to solve problems with AUTOSAVE files

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