GanttTool

GanttTool is an online Gantt chart editor designed for quickly creating and managing project timelines in the browser. It enables users to build structured schedules with tasks, dependencies, and milestones without requiring installation or signup. Built on top of PlantUML, it supports both visual drag-and-drop editing and text-based diagram definitions for flexible workflow management and version control.

Key features include an intuitive drag-and-drop interface for adjusting task durations, start dates, and dependencies directly on the chart. Users can define tasks, groups, and milestones using PlantUML syntax, making it easy to store and track project plans in source control systems or documentation. GanttTool supports task hierarchies, dependency lines, and visual markers for key dates, helping teams understand critical paths and project structure at a glance. Because it runs entirely in the browser and does not require registration, it is well suited for quick planning sessions, lightweight documentation, and sharing timelines via exported diagrams or shared files.