Scripts vs Extensions vs Plugins
Explained

Scripts (.jsx)

Scripts are lightweight code files that automate tasks inside After Effects. They're written in ExtendScript (Adobe's JavaScript variant) and can do things like:

• Batch-rename layers
• Reposition anchor points (like Ankorss)
• Generate text animations (like our animated handwriting tools)
• Automate repetitive workflows

→ Learn how to install scripts

Extensions (.zxp)

Extensions are more sophisticated than scripts. They use web technologies (HTML, CSS, JavaScript) to create rich UI panels and can communicate with external services.

• Have modern, polished interfaces
• Can connect to the internet (APIs, cloud services)
• Often require a separate installer
• Examples: Font management panels, stock footage browsers, team collaboration tools

→ Learn how to install extensions

Plugins (.aex / .plugin)

Plugins are compiled software that adds entirely new capabilities to After Effects. They're the most powerful type of add-on, but also the most complex.

• Add new effects (like Trapcode, Element 3D, Boris FX)
• Introduce new layer types or rendering methods
• Require compilation for each OS (Windows vs Mac)
• Usually come as installer packages (.exe, .dmg, .pkg)

Expressions

Expressions aren't add-ons. They're JavaScript code you write directly on layer properties. They create dynamic relationships between properties without keyframes.

• Link one property to another
• Create procedural animations (wiggle, bounce, etc.)
• React to markers, layer names, or other data
• No installation needed: just Alt/Option-click a property's stopwatch

We'll be adding expression tutorials and deep-dives in the future. Stay tuned!

Quick Comparison