免費的 UML 繪圖工具

A Free online UML diagram software to create professional UML drawings

Need a Free UML Drawing Tool?

Visual Paradigm Online Free Edition is a free, easy-to-use UML tool with tons of diagramming features to let you create UML diagrams quickly online. The UML tool is free for non commercial purposes. You can draw UML diagrams entirely with drag-and-drop. You can add your own images into your drawings. When you are done you can save your drawing into Google Drive or in the cloud repository provided of VP Online. VP Online Free Edition is a great way to discover if a handy UML diagramming solution is what you are looking for.


Drawing professional class diagrams quickly and freely

完全免費

Draw free UML diagrams for personal purposes:

  • Unlimited no. of diagrams and shapes
  • Won't expire

畫得更快 & 更好

Create professional UML diagrams in a snap. Our online UML tool features:

  • Drag to create and connect shapes
  • Well attached connectors (no separate apart)
  • Replicate shape format in one click
  • Reuse shapes in diagrams
  • Hundreds of diagram examples & templates

Be a UML Pro.

A range of powerful diagramming tools are there to support you in producing great UML diagrams:

  • Accurate shape positioning with alignment guide
  • Include external images, URLs and text in diagrams
  • Wide range of formatting options
  • Easily rotatable shapes
  • Group, align and distribute shapes
  • Build an item list for instant shape formation


然而,這並非全部……

然而,這並非全部……
  • 終身免費
  • 沒有圖表數量限制
  • 沒有圖形數量限制
  • 全方位繪圖工具:ERD工具、UML工具、組織結構圖工具、平面圖工具、ITIL,商業概念圖
  • 無縫升級至付費版本以獲取更多更強大的圖表類型和功能
  • 全面兼容各款瀏覽器,並適用於所有作業系統 - Mac, Windows, Linux
  • 拖拽式操作,無需學習和培訓就能輕鬆繪製出專業的圖表。
  • 多種多樣的格式選項(形狀和線條,純色和漸變色),40多種連接器類型,RTF標題,字體選項,陰影效果等
  • 用自己的形狀繪製自己的圖。
  • Visio 圖表和模板導入
  • 兼容多種文件格式,一鍵導出 PNG,JPG,SVG,GIF,PDF,方便您與他人進行分享
  • 數百個圖例和模板,讓您輕鬆創建出各種專業圖表
  • 將圖表儲存至 Google 雲端硬盤
  • 輕鬆地將文字,外部圖像和網頁鏈接嵌入到圖表中

親自體驗,更證美好

只需瀏覽下面的UML 圖表示例,點擊開啟圖表打開編輯器,您將親眼印證我們所說的一切 。

創建屬於您的圖表

沒有限制,一按啟用。


開始使用