A desktop publishing application from Microsoft that focuses on page layout and graphic design.
That depends on whether you have a Microsoft 365 subscription or a one-time purchase (perpetual) license.
For Microsoft 365 subscribers, access to the Publisher application will end in October 2026. You will no longer be able to open, view, or edit .pub files in Publisher. You should convert any important Publisher files before access ends. You can open each file in Publisher, select File > Save As, and save it as a PDF. If you need to continue editing the text, you can also convert the resulting PDF to Microsoft Word.
For perpetual-license holders, such as users with Publisher 2021, 2019, or 2016, the application will remain installed and you can continue opening and editing .pub files. However, Microsoft support for Publisher ends on October 13, 2026. After that date, the application will no longer receive security updates, bug fixes, or technical support, and future Windows updates could eventually create compatibility issues.
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hth
Marcin