A is a single .psjs or .idjs JavaScript file used for one‑off, repetitive tasks like batch processing. It cannot have a persistent panel UI and is not eligible for distribution via the Adobe Marketplace. A plugin , on the other hand, is a full project (multiple files, a manifest.json ) that can include persistent panels, dialogs, menus, and can be packaged ( .ccx ) for distribution.
. Its primary appeal lies in its ability to bring modern web development workflows—including hot reloading
In traditional CEP or ExtendScript development, testing a single line of UI or logic change often required closing the host app, clear-caching, and relaunching—a massive drain on productivity. The UXP Developer Tool solves this with instantaneous hot reloading. How Hot Reloading Works in UXP adobe uxp developer tool hot
When using or Webpack , running a standard web development server ( npm run dev ) spins up a local localhost server (e.g., http://localhost:5173 ). UXP cannot natively parse an external network URL as its primary entry point in standard production mode, but during development, you can point your manifest or entry files to watch a compiled build directory. To make Vite work seamlessly with UDT Hot Reload:
The Adobe Unified Extensibility Platform (UXP) has fundamentally changed how developers build plugins for Creative Cloud applications like Photoshop and Illustrator. Moving away from old, sluggish web views, UXP executes modern JavaScript in a native environment for blistering performance. A is a single
Easily structure your plugin with modern JS modules.
finished projects into .ccx files ready for distribution on the Adobe Exchange. Harnessing UXP Hot Reloading for Rapid Development How Hot Reloading Works in UXP When using
If you save a file containing broken JavaScript syntax, the UDT will fail to parse the asset and will silently reject the hot update to avoid crashing the host application engine.
By using the Adobe UXP Developer Tool to create a responsive, hot-syncing feedback loop, you radically compress your development cycles and build richer, more stable Creative Cloud plugins.