Marmady's mermaid gantt chart maker is the fastest way to visualize project timelines. Use simple Mermaid syntax to define tasks, durations, and dependencies, and generate professional Gantt charts instantly in your browser.
Convert complex project schedules into easy-to-read visual timelines that anyone can understand.
Define how tasks relate to each other to identify critical paths and potential bottlenecks early.
Adjust dates and durations in your code and see the chart update instantly. Fast iteration for project managers.
Keep your project documentation up-to-date by using text-based Gantt charts that stay in sync with your codebase.
A Mermaid gantt chart maker is an essential tool for project managers and technical leads who need to visualize timelines without the overhead of heavy software. By using simple text definitions, you can map out complex project lifecycles, track milestones, and manage task dependencies with ease.
Organize your project into logical phases using the section keyword. Each task follows with a name, status, and duration:
section Design Phase
Mockups :active, des1, 2026-04-10, 5d
Review :after des1, 2d
Our free gantt chart generator supports multiple time formats. You can define exact start/end dates or use relative offsets like after task1.
dateFormat YYYY-MM-DD sets the global format.axisFormat %m/%d controls the visual timeline display.h, d, or w.Maintaining project timelines in Excel or specialized GUI tools often leads to outdated documentation. With the Marmady gantt chart tutorial and editor, your project plan becomes part of your source code. If a sprint deadline shifts, you simply update one date in your text, and the entire timeline shifts accordingly.
You can exclude weekends or specific holidays from the timeline calculation:
excludes weekends, holidays 2026-05-01
Coordinate marketing, development, and QA efforts toward a single ship date.
Visualize how tasks within a two-week sprint interact and where the bottlenecks lie.
Map out complex server handovers and database updates during maintenance windows.
Marmady is a high-performance, open-source alternative to the standard Mermaid Live Editor. Designed for developers who need speed, it functions as a Mermaid.js Live Editor and a Markdown diagram generator.
Convert code to flowcharts instantly with zero lag. See your architecture evolve in real-time.
The most reliable free sequence diagram tool with high-resolution SVG, PNG, and PDF support.