Opening an OAT File

The OAT file type is primarily associated with Android.

OAT	File extension: OAT
	File type:	optimized runtime application

What is an OAT file

OAT files mostly belong to Android by Open Handset Alliance. An OAT file is an optimized runtime application that Android operating system generates from an APK package. This is done to speed up application startup/update time and improve user experience. OAT files are saved in Executable Linkable Format. These files are generated by the dex2oat executable on Android platforms. They contain native code compiled from Dalvik Bytecode which Android Runtime's (ART) just-in-time compiler uses to improve application performance overtime.

How do you open OAT files?

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

Online OAT Text Viewer

Choose your .oat file to analyze

or drag and drop it here

Online File Viewer

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4 Steps to Open an Unknown .OAT File

Because .OAT files can come from different programs, they aren't universally openable.

Identify the Source: A file received from a mobile developer or extracted from a smartphone is likely an Android optimized runtime application.
Check the Header: Open the file in a hex viewer to inspect the first few bytes:
- \x7F ELF indicates a compiled Android Runtime (ART) executable.
- Readable text or XML suggests a standard configuration file rather than compiled code.
Use the Original Software: You usually need the original software to open it; try Android Studio, the Android SDK oatdump tool, or ask the sender if you are uncertain.
Use this Webpage: Drag and drop your .OAT file here to detect its format, extract metadata, and preview readable text.

Technical Data for OAT File Extension

File classification:

Developer

Related files:

ota, apk, cnt, nomedia

an oat optimized runtime application is a special file format by Open Handset Alliance and should only be edited and saved with the appropriate software.

How to solve problems with OAT files

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