Want a free, web-based sequence diagram creator?

Visual Paradigm Online Free Edition features a Free sequence diagram editor that comes with a wealth of great features, UML examples and templates. It helps you create professional and impressive software design blueprints easily and quickly. Visual Paradigm Online is a great piece of UML software for people who want to jump in and design software without a whole lot of overhead.

Make a Sequence Diagram

Create fantastic sequence diagrams with powerful and intuitive tools

Free UML Tool

Create as many UML drawing as you need and output them into images. No ad.

No limited number of diagrams and shapes
No expiry date
Ad free

Draw Fast

Create professional sequence diagram with our web-based UML editor. Some of the editing features:

Drag and drop shape editor
Connectors glue well to shape border
Click to copy shape formats
Reuse shapes in another diagram
Start quick with diagram templates

Feature-Rich

A full set of editing features are there to assist you in producing high quality result for use in your reports and presentations:

Position shapes precisely using alignment guide
Add images, URLs and text
Many color and formatting options for shapes
Rotate shapes and captions with ease
Group, align and distribute shapes
Auto. shape formation from list of text

Key features and benefits

Unlimited period of access
Unlimited number of diagrams
Unlimited number of shapes
UML Tool, ER Diagram Tool, Organization Chart Maker, Floor Plan Designer, ITIL, Business Concept Diagram
Can be upgraded to paid editions for more diagram types and features
Cross-platform: Windows, Mac, Linux. Compatible with all web browsers
Easy to use: Create and connect shapes with drag and drop. Connectors will snap to shapes and never separate apart.
Apply different formatting options (shape and lines, solid and gradient paint), 40+ connector types, RTF caption, font options, shadow effect, etc
Draw your own diagrams with your own shapes.
Visio drawing and stencil import
Get start quickly with hundreds of diagram examples and diagram templates
Print, export and share your work in different formats (PNG, JPG, SVG, GIF, PDF)
Easily embed text, external images and web links to diagram
Save diagrams in Google Drive

But don't take our word for it

Try it yourself. Just browse the Sequence Diagram examples below and click Open Diagram to open and edit. You will see for yourself that it is everything we say it is, or perhaps more.