.AEPX File Extension
After Effects XML Project
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What is a AEPX file?
An AEPX file is a project file created by Adobe After Effects, a video-editing application. It contains a video composition, which includes references to video assets, motion graphics settings, and visual effects. AEPX files are used for creating professional-quality video productions.
The AEPX file is one of two file types used to save video editing projects in After Effects. The main format is the .AEP file, which is saved in binary format. The other format a project may be saved in is the AEPX file, which is a text-based XML project file.
To create an After Effects project, select File → New → New Project then click File → Save a Copy As XML....
To open an After Effects project, select File → Open Project....