Creating a quick sequence diagram online
web based sequence diagram is a website you can use to easily create quick sequence diagrams. The input to the website is a text-area that you can use to enter the commands to create the sequence diagrams. There are also templates available that you could start with. The nice thing about it is that you can quickly learn how to use it. By just looking at the code of a few templates should be enough for you to start creating your sequence diagram. The output of the program is a .png file. I find this tool really useful for scenarios in which you need to create a quick diagram to demonstrate your idea.
Here is the sample input to the program:
USER->SERVER: validateUser(name,password) activate SERVER SERVER->userMapper:(name,password) activate userMapper userMapper->SERVER:result deactivate userMapper SERVER->USER: deactivate SERVER
and here is the generated diagram:
There are also several display options which you can use to choose the generated diagram just the way you like it to. The following is the same diagram using another display option(style: napkin):
