Free UML Editor Online

It's a free, web-based drawing software for UML diagrammers

Here is a Free UML Editor!

Visual Paradigm Online is a popular and robust online UML editor, with lots of simple and advanced diagramming features that support different UML diagramming needs. For beginners, there are plenty of UML examples and templates to help you get started in creating your own UML diagrams. The Free edition is free for non-commercial use and support everything you need in system design: UML, ERD, Organization Chart and more. You may upgrade to higher editions for more diagrams like flowchart, ArchiMate, PERT, BPMN, mind map, PERT with a very low cost.

Everything you need to create amazing UML class diagram and more


Free UML diagram software ready for non commercial uses!

  • Create unlimited number of diagrams and shapes
  • No limited period of access
  • No ads

简单 & 快速绘图

Create brilliant online UML diagrams with our intuitive online UML editor. Highlighted features:

  • Drag and drop based editor
  • Reliable connectors (no separate apart)
  • Format copier
  • Keep a lib of shape template for reuse
  • Hundreds of start-up templates


Draw better UML diagrams with the use of powerful editing tools. Here are some of the editing features to support you in creating brilliant UML diagrams:

  • Alignment guide: Position shapes accurately
  • Embed your own image, URL and text
  • Shape and line formatting options
  • Rotatable shapes and text
  • Group, align and distribute shapes
  • Auto. create shape from item list


  • 终身免费
  • 没有图表数量限制
  • 没有图形数量限制
  • 全方位绘图工具:ERD工具、UML工具、组织结构图工具、平面图工具、ITIL,商业概念图
  • 无缝升级至付费版本以获取更多更强大的图表类型和功能
  • 全面兼容各款浏览器,并适用于所有作业系统 - Mac, Windows, Linux
  • 拖拽式操作,无需学习和培训就能轻松绘制出专业的图表。
  • 多种多样的格式选项(形状和线条,纯色和渐变色),40多种连接器类型,RTF标题,字体选项,阴影效果等
  • 用自己的形状绘制自己的图。
  • Visio 图表和模板导入
  • 兼容多种文件格式,一键导出 PNG,JPG,SVG,GIF,PDF,方便您与他人进行分享
  • 数百个图例和模板,让您轻松创建出各种专业图表
  • 将图表储存至 Google 云端硬盘
  • 轻松地将文字,外部图像和网页链接嵌入到图表中


只需浏览下面的UML 图表示例,点击开启图表打开编辑器,您将亲眼印证我们所说的一切 。