The latest UI.Vision RPA software/XModule brings integrated OCR support.
This OCR has a few limitations comparted to the online OCR (less languages, somewhat reduced accuracy) but it runs 100% local, is very fast and works on machines without Internet connections. XModule OCR is currently available for Windows and Mac (not Linux yet).
Please note: For offline OCR to work, you must also download and install the 2022 XModule version.
The update is available for Chrome. Versions for Firefox and Edge will follow.
For more information see the desktop screen scraping page.