I had ChatGPT build me a free PDF editor because I didn't trust it to change my files - it worked!

The smartest way to use AI may not be letting it touch your files, but asking it to write software that handles them safely - ...
BBC

Client-side scripting using JavaScript

The client is the computer system (including tablets and mobile devices) that is running the web browser. Client-side scripts are interpreted by the browser and executed on the client system.