Version 4.0. of InPage Urdu, released in 2024, added support for exporting InPage documents (INP format) to ePUB format, essentially covering the inp to epub conversion directly without the need to use third party software.
Previously you had to export your documents to RTF and build an ePUB ebook from the file using Calibre or similar ebook tool.
Updated: February 9, 2024