On a Windows 10 PC, you can press Windows+R on your keyboard to open the Run dialog. Release port 8080 before starting Calibre server on Windows computer Click Apply button at the bottom-right corner to apply the change. You can change the port number from 8080 to another, say 8000, 8081, etc. In the “ The port on which to listen for connections” box, enter a new port number. To change the default server port, click the Preferences button and choose “ Sharing over the net” in the pop-up window. Changing Calibre Content Server Port Number If you run into this problem when trying to start Calibre server, you can try to change a different port number for the Content Server or figure out if the default port number is used by another program and kill the program before starting the Content Server in Calibre. calibre error failed to start content server on windows pc

Sometimes however the content server may fail to start and through an error: No socket could be created. You can use this IP address and port number to connect to Calibre library from other computers and devices connected to the same network. Instead of the Start Content server, you should see a Stop Content server action with an IP address and port number. If no error message pops up, you should get the content server address in the same place you start the server. To do that, click the Connect/share button and choose Start Content server. Before the transfer however, you will need to turn on the Content Server on computer first so other devices and computers can access your Calibre libraries and read books directly in a web browser. For example, iOS users can use it to convert ePub books for iPhone iPad for free, then send Calibre books to iPhone iPad wirelessly using its Content Server utility. It offers excellent support for converting books to different formats and sending them to other devices easily.

Calibre is one of the most popular free ebook reader, converter, editor.

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