TCP Spy 2.12

TCP Spy description:

When TCP Spy's Start button is pressed, it will capture and display all socket calls of the next application that starts and makes a socket call. It will also capture and display the data that is sent and received on the application's sockets. The application can be of any type.

TCP Spy displays its output in a scrollable text box. This data may additionally be sent to a file as text or HTML. By default, only 32KB of data is kept in the scrollable text box. Higher data limits may be selected, including unlimited.

Based upon each socket's first transferred message, TCP Spy will determine if the protocol being communicated over the socket is text based. If so, TCP Spy will test each following message for text. If a message contains only text, TCP Spy will display it as such. Else, TCP Spy will show the message in hexadecimal and ASCII. If the protocol is HTTP, the HTTP headers will be displayed as text.

Without a license, TCP Spy does not provide the option of sending data to a file, and only keeps 32KB of data in the scrollable text box. When you register TCP Spy, you will be sent a code that enables the additional features.


TCP Spy 2.12 was released on Feb 25, 2008. The current version will run on Windows 2000, XP.

TCP Spy is a shareware. You will be able to use the evaluation version available for download during a limited period, after what you will have to buy the full version to continue to use TCP Spy.

Size of TCP Spy 2.12 download is less than 505 Kb. DSL users will only need one minute to achieve the download, when 2 minutes may be required when using a 56k modem. (See below to download TCP Spy 2.12).