aia

.aia — App Inventor Archive

MIT Center for Mobile Learning · 2010

Developer

MIT Center for Mobile Learning

Key Features

Contains all project assets (code, design, media).
Enables saving, sharing, and resuming app development.
Structured as a ZIP archive for easy extraction.
Integral to the MIT App Inventor platform.

Best For

Storing and managing MIT App Inventor projects.
Distributing app project templates.
Preserving the state of a mobile app under development.

Less Ideal For

Directly running or installing on a mobile device.
Distributing final, compiled mobile applications.
General file archiving or compression.
Storing code for other programming languages.

Common Use Cases

Saving a work-in-progress mobile app project.
Sharing a completed app project with others for review or modification.
Backing up app projects before making major updates.
Collaborating on app development with multiple users.

How to Open It

Open the MIT App Inventor website (appinventor.mit.edu).
Click the 'My Projects' button to access your projects.
Click the 'Start new project' button and then select 'Import project (.aia) from my computer'.
Choose your .aia file, and it will be loaded into the App Inventor editor.

What is a .aia file?

An .aia file is an archive containing all the components needed to build a mobile application using MIT App Inventor. This includes the visual design of your app, the blocks of code that define its logic, and any assets like images or sounds you've included. Essentially, it's the project file that allows you to save, share, and continue developing your mobile app creation in the App Inventor environment. By using .aia files, developers can collaborate on projects or back up their work before making significant changes.

Programs That Open .aia Files

Platform	Program
Web Browser	MIT App Inventor	Free	Official

How to Convert .aia Files

Format	Method
.APK	MIT App Inventor (Build > Android App (.apk))
.AAB	MIT App Inventor (Build > Android App Bundle (.aab))

Common Problems with .aia Files

⚠️ Cannot open the .aia file directly.

An .aia file is a project archive and must be imported into the MIT App Inventor environment to be opened and edited.

⚠️ App Inventor says the .aia file is corrupted or invalid.

Ensure the file was downloaded completely. Try re-exporting the .aia file from its original source. If it was shared, ask the sender to re-export it.

Frequently Asked Questions

Can I run an .aia file on my phone?▼

No, an .aia file is a project source file, not an executable application. You need to use MIT App Inventor to build an APK or AAB file which can then be installed on your phone.

How do I share my App Inventor project?▼

Within MIT App Inventor, you can export your project as an .aia file by going to 'My Projects' > 'Export selected project (.aia) to your computer'.

What's the difference between .aia and .apk?▼

An .aia file is the source code and project definition for an App Inventor app, editable within App Inventor. An .apk file is the compiled, installable application package that you can run on Android devices.

Technical Details

An .aia file is essentially a ZIP archive. When unzipped, it reveals a collection of files, including a project file (often with a .bky extension for the blocks editor), a properties file, and folders for assets like images and sounds. This structure allows the App Inventor IDE to load and reconstruct the entire project.

Did You Know?

The .aia format is based on the standard ZIP file format, meaning you can technically open it with any unzipping tool, though its contents are specific to App Inventor.

MIT App Inventor was originally developed by Google and later handed over to MIT, where it continues to be developed and maintained.

Security Information

As .aia files are project archives and not executable code themselves, they pose minimal direct security risk. However, always download projects from trusted sources, as malicious assets or logic could be embedded within the project.