7 Best Free Online Sequence Diagram Tools in 2021

A sequence diagram is a type of UML diagram that is used to model scenarios happening on a certain process. This lets you see a system in a logical view by means of graphical figures. In particular, it displays the interactions of objects with each other, the exchanging of messages between them, and event scenarios in the order they take place. Understanding the requirements of a new system can be realized through this tool. Hereto, we’ll be sharing with you the best free online sequence diagram tools you can use to create this diagram.

Sequence Diagram Online Tools

• GitMind
• Gliffy
• UMLetino 14.3
• Moqups
• StarUML
• Dia Diagram Editor
• Lucidchart

GitMind

GitMind is a free and online diagramming tool that allows users to design and structure any type of diagram. Since this program is web-based, you don’t need any installation and proceed immediately in creation. In addition to that, it comes with pre-designed templates that allow you to create sequence diagrams, flowcharts, and other types of UML diagrams in no time. Moreover, you can export diagrams to image files supporting PNG, JPG, and SVG.

Gliffy

Gliffy is another free sequence diagram tool you may also consider using. It has an extensive library of shapes with dedicated shapes for almost all types of diagrams. The program features a clean and simple user interface. Shapes are properly arranged in folders and function buttons can be easily recognized. Aside from that, Gliffy offers communication tools for seamless collaboration and improve teamwork.

UMLetino 14.3

This list will not be complete without UMLetino 14.3. The interface doesn’t look appealing but serves its purpose as far as the creating of diagrams goes. Despite this, you can still create structured and comprehensive diagrams using the preset UML elements. Besides, you can easily drag-and-drop the elements and place them wherever in the working canvas to portray the diagram you are trying to generate. You can zoom in and out or customize your viewing experience using a dedicated window.

Moqups

Design a sequence diagram using this web-based tool and work anytime anywhere with your team. Moqups is a professional diagramming tool that allows you to create wireframes, mockups, flowcharts, graphs, charts, and marketing plans in a graphical manner. Similarly, the tool offers a huge library of templates for different purposes. Each template is highly customizable allowing you to customize elements with advanced customization tools. Also, you can share your work or invite users and edit together with your team on board.

StarUML

StartUML is one of the best UML diagram creators. This is a cross-platform software offering support to Windows, Mac, and Linux. With it, you can build structured UML diagrams like sequence diagrams, use case diagrams, er diagrams, and a lot more. All you have to do is to choose the model that you want to design and the application will automatically load every tool and object you need. You can also personalize the appearance of your diagrams using the “Style” feature provided by the tool.

Dia Diagram Editor

Same benefits of a free program, multi-platform, and easy-to-use program you will get when using Dia Diagram Editor. It has a user-friendly interface that allows you to navigate the interface without even prior experience. You can also use this as an engineering tool to build flowcharts, network diagrams, electrical circuits and so much more. This completely free program also offers predefined symbols and objects. More importantly, you can choose from multiple import and export format options available.

Lucidchart

Last but not least is Lucidchart. Using this tool, you will be able to turn complex system operation or procedure into a professional yet comprehensive graphical representation. What’s so good about this program is that it features sequence markup. With it, you can set rules and adjust the order of sequence however you like. Moreover, it’s easy to add lifelines from the dots on an object and put labels on the arrows effortlessly. Overall, Lucidchart is a professional yet convenient tool you can use.

Conclusion

A sequence diagram is used primarily to show a sequence of events. This allows you to understand interactions within hardware or software systems. Also, you can use it to document the requirements of a system to develop a well-structured program. Hence, the above tools are made to help you in drawing a sequence diagram. You may try each recommendation and find out which is most convenient for you.