An AET file serves primarily as a reusable template for AE, working like a master AEP that you open to generate new projects while leaving the template intact, and it contains the project’s full structure—compositions, timeline layouts, layered elements, animated keyframes, effects, expressions, camera/light setups, render/project settings, and the internal folder organization and interpretations.

What it usually doesn’t include is the raw media itself; instead it keeps references or paths to external footage, images, and audio, which is why templates are often delivered as a ZIP with an assets/Footage folder and why you’ll see missing-file prompts if items were left out or not synced, and because AETs may rely on specific fonts or third-party plugins, opening one on another machine can trigger missing-effect alerts until everything is installed or relinked, with the final reminder that although AET typically means an After Effects template, file extensions aren’t exclusive, so checking "Opens with" in file properties or recalling where the file came from is the safest way to confirm what program created it and what extra files it should include.

If you loved this short article and you would like to receive a lot more info with regards to AET file software kindly take a look at the web site. An AEP file represents the editable project you’re actively working on, while an AET is a reusable template, so in practice the difference lies in purpose: you open an AEP to continue that same project, but you open an AET to begin a new project instance so the original stays clean.

That’s why AETs are widely used for packaged motion-graphics templates such as intros, lower-thirds, and slideshows: the creator keeps the AET as the master and each time a new video is needed you open it, immediately Save As a new project (becoming your own AEP), then swap text, colors, logos, and media, and although both formats can store the same project elements—comps, layers, keyframes, effects, expressions, cameras/lights, and settings—and both usually reference external footage, the AET is built to protect the master for repeatable work while the AEP serves as the editable file you keep updating.

An AET file retains the structural and behavioral setup of an After Effects project without always embedding media, including compositions with their resolution, frame rate, duration, and nesting, alongside the full timeline build of layers like text, shapes, solids, adjustment layers, precomps, and placeholders, each with properties such as position, scale, rotation, opacity, masks, mattes, blending modes, and parenting, plus animation data like keyframes, easing, markers, and any expressions that automate movement.

Additionally, the template captures effects and their configurations, such as color correction, blurs, glows, distortions, and transitions, together with any 3D setup—cameras, lights, 3D layer settings—and render/preview preferences, plus project structure like folders, labels, interpretation settings, and proxies, though it usually omits embedding raw media, fonts, or plugins, depending on linked paths that can lead to missing-footage or missing-effect warnings when the file is opened elsewhere.