是一款免費且開放原始碼的圖表繪製工具，跨平台，支援 Windows、macOS 和 Linux 作業系統。這款軟體可用來繪製流程圖、UML 圖、Venn 圖、工程圖、網路圖及其他圖表。起初它只是個線上圖表繪製工具，但由於功能強大，再加上檔案可儲存至本機硬碟或者 Google Drive、OneDrive、Dropbox 等網路硬碟，因此深受使用者喜愛。本軟體是繼線上版之後推出的離線版桌面程式，同樣擁有簡單易用、介面親和、功能卓越、速度快、圖庫與模板豐富等優點。
這款軟體所繪製的圖表預設儲存為可再編輯的 XML 檔案 (以 .drawio 為副檔名)，但亦可匯出為 PNG、JPG、SVG、PDF 或其他檔案格式。它的官網暨線上圖表繪製工具所在的網頁原本為 https://www.draw.io/，但現在分別變更為 https://www.diagrams.net/ 和 https://app.diagrams.net/。不過，使用者亦可在進入官網之後點擊右上角的「Start Now」按鈕來啟動其線上圖表繪製工具，無須登入或註冊。
離線版桌面程式的檔案繼續使用 Draw.io 這一名稱，程式提供安裝版與免安裝版供使用者選擇。必須注意的是，程式首次啟動後為簡體中文介面，請點擊功能選單的「其他」→「語言」或點擊程式視窗右上角的地圖圖示，然後點選「繁體中文」，程式重新啟動後即變成繁體中文介面。
§ 作業系統：Windows 7/8/10/11
§ 官方網站下載頁面
§ 線上圖表繪製工具
§ 檔案下載
Draw.io 原文簡介：
The application could have various uses. Whether you are a student and are trying to impress your teacher with a very well done diagram, trying to explain things or trying to better organize your available teams as a manager, the program is ready to serve you and it will do that in a more than satisfactory way.
The program’s interface is clean and good looking. It does not seem crowded or oversaturated with visual elements. At the same time, the look of the application is modern and attractive.
The program is simply easy to use. It is fast and responsive. Every particular option and feature is conveniently placed and well organized within the interface. You will generally find the various elements and options where you’re expecting them to be.
The program is an application that won’t disappoint. It’s got plenty of functionality, gorgeous looks, and an intuitive interface, altogether contributing to fast and well-done work. The program also receives constant updates, which means further functionality is almost guaranteed.