AEPX File Extension

After Effects XML Project

File Type aepx
Developer Adobe Systems
Popularity
4.2 (35 votes)
Application Adobe After Effects
Category Document Files
Format XML

What is a AEPX file?

The AEPX extension is related to After Effects XML Project and is classified in the Document Files category, which contains 969 files.

Adobe, the developer of the After Effects XML Project (AEPX), has released file format and 81 programs designed to handle them.

AEPX file support extends to various operating systems, including Windows, Linux and Mac OS. There are 3 programs available to open a AEPX file, including popular tools like Adobe After Effects, Adobe Creative Cloud and Adobe Creative Suite.

Windows

Mac OS

Linux

Adobe Creative Cloud

How to open a AEPX file?

If you are having trouble opening a AEPX file, it usually means the right software is not installed. Choose a program from the list that matches your operating system. Next, visit the official website of the developer, download the software, and install it on your device.

Thanks to their popularity, Adobe After Effects, Adobe Creative Cloud and Adobe Creative Suite are often the go-to programs for managing AEPX files. If you want the most recent release of Adobe After Effects, head over to the Adobe site and download the version designed to run on all platforms.

After completing the installation, AEPX files should be recognized by the system and linked to Adobe After Effects.

Set Adobe After Effects as your default AEPX viewer

Set default app to open files on Mac

Right-click or Control + left-click on the desired AEPX file to open a menu of available actions;
Choose "Open in Application" and click "Other";
In the lower section of the window, you’ll find the "Enable" menu, with "Recommended Programs" pre-selected as the default option;
Select "All Programs" in this menu, and then search for Adobe After Effects. Check the box next to "Always open in app" to make sure it’s the default option.

Change a default app in Windows

To get started, right-click your AEPX file, then choose "Open With" and select "Choose Another Application" from the context menu;
From the list of applications in the pop-up window, find and select Adobe After Effects as your desired application;
Check the "Always use this app" checkbox, and then click "OK" to set your chosen app as the default for opening AEPX files.

Solving Common AEPX File Challenges

While AEPX files can sometimes present difficulties, most problems can be resolved quickly with minor software modifications. Check the tips below to help solve them.

What Causes Adobe After Effects to Crash Frequently?

Insufficient software updates are a likely cause of Adobe After Effects crashes. Be sure to install the latest updates for Adobe products.

A simple restart of your computer can often fix many common problems, which is why it is the recommended first step before making any adjustments to your software settings.

How can I restore a damaged AEPX file?

Start a data recovery program and open the damaged AEPX file. Then, choose the "Repair" option from the menu. Allow the recovery process to complete, which will automatically repair the damaged document files.

How can I determine if my AEPX file is damaged?

Characteristics of corrupted AEPX document files can include:

Adobe After Effects or other programs stop responding or crash when trying to handle the file;
Error notifications appear during file manipulation;
When opening the file, errors occur or the inability to access its contents;
Unexplained AEPX file size inflation;
Editing the archive in Adobe After Effects is hampered by poor overall performance;

How to edit a AEPX file?

To modify AEPX files, you need to install special software that makes it possible to open and edit document files. Online AEPX editors are more restricted compared to software designed for After Effects XML Project.

Best AEPX Editor Software in 2026

Taking the above factors into account, we have selected a list of AEPX editors currently available.

AEPX Editor Software	Developer	Platforms	Overall Rating
Adobe After Effects	Adobe	Windows	4.8 out of 5 (42 reviews)

Convert files to and from AEPX

If working with a AEPX file is challenging, one solution is to convert it to formats like MP4 or other supported formats.

After converting a AEPX file, some capabilities may be limited, but you can often convert it back to the original format.