What is .STC file extension?
Connection file created by Contribute, an Adobe program used for website development and publishing; saves the remote host, the connection protocol (e.g., FTP, SFTP, etc.) and the username; enables users to reuse connection information and distribute it among website developers.
When you double-click an STC file, Contribute opens a connection to the remote server and shows the remote files.
You can see a list of software programs here on easyfileopener.org that can open this file type so that you don’t need to search for it on the web. You can then open your file with this extension using a software listed below.