.AEPX File Extension

After Effects is available for Windows and macOS and is used to create visual effects and motion graphics, typically in post-production for TV shows and films. The software allows you to save a video project as a local file on your computer or as a team collaboration project. There are two local project formats:

• After Effects Project (AEP) - The primary format Adobe recommends for saving After Effects projects. It is a binary format that results in smaller, quick-loading files.
• After Effects XML Project (AEPX) - The alternate project format Adobe recommends for After Effects users looking to save a copy of their project or as an intermediate project for automation workflows. It is a text-based format saved in the XML standard that is larger and slower to load than the AEP format but allows you to modify project details with an XML or text editor.

How to create and save AEPX projects

To create an AEPX project, select File → New → New Project, then click File → Save or Save As → Save A Copy As XML.... After saving an AEPX project, you can close it, re-open it, then continue to edit it.