Gantt Chart Template

What is Gantt Chart Tool?

This Gantt chart tool lets you create project timelines online and convert them to Mermaid code for GitHub, Notion, and Obsidian. Organize tasks with groups and subtasks, drag to adjust dates, and link dependencies between tasks. All data is stored locally on your device — nothing is uploaded to any server. Export your Gantt chart as Mermaid code with one click.

Key Features

• Completely free Gantt chart software — no sign-up or installation required
• 100% local browser processing for complete privacy — no data sent to any server
• Group tasks and subtasks to organize your project hierarchically
• Drag and drop to adjust task durations and date ranges intuitively
• Link task dependencies — click to draw arrows and show the order of work
• Smart assignee dropdown — type once and it auto-saves for reuse across tasks
• Color-code by group for consistent styling or customize individual subtask colors
• Mark key milestones with diamond markers on the timeline
• Day week and month zoom views to see your project at any level of detail
• Auto-save — your chart persists even after closing the browser

Use Cases

• Project Planning: Visualize your entire team's workload and prevent scheduling conflicts
• Software Sprints: Map out task dependencies and milestones across development cycles
• Marketing Campaigns: Manage content calendars, ad launches, and review deadlines on a single timeline
• School Projects and Theses: Organize research, drafting, and submission deadlines step by step
• Freelancer Workflow: Lay out multiple client projects side by side to avoid overlapping schedules
• Event Planning: Break down venue booking, promotion, and rehearsal into a visual stage-by-stage plan
• Construction and Interior Design: Create simple schedules to share with contractors and subcontractors
• Personal Goal Tracking: Set timelines for language study, certifications, or self-improvement milestones
• Startup Roadmaps: Share your product timeline from MVP to launch with investors and stakeholders
• Status Reports: Screenshot your project progress and drop it directly into any report or presentation

Pro Tip: Managing Dependencies in Gantt Charts

The most powerful yet overlooked feature of a gantt chart is task dependency linking. By connecting predecessors — development starts after design is complete — you can instantly see which tasks are affected when a deadline slips. This chain of dependent tasks is called the Critical Path and it determines the minimum total duration of your project. Setting dependencies before scheduling prevents unrealistic deadlines and reduces cross-team conflicts.

Export to Mermaid Code

This Gantt chart tool lets you convert visually built project timelines into Mermaid code. Mermaid is a text-based diagram syntax natively rendered by GitHub, GitLab, Notion, Obsidian, and many other platforms. After drawing your chart, click the Mermaid button to generate code instantly, then paste it into any Markdown document to display the same Gantt chart. Groups become Mermaid sections and tasks are converted with their dates. Dependencies map to the after syntax, milestones to the milestone tag, and progress to done or active status. Mermaid code focuses on core project data — dates, dependencies, milestones, and progress. Visual-only fields like color and assignee are omitted.

Import Mermaid Code

You can paste Mermaid Gantt code generated by other tools or AI into this editor for visual editing. Paste the code in the Import tab and click Load to build the chart automatically. Adjust dates by dragging, edit dependencies, then export the updated Mermaid code.

How to Use

1. Start a project: Enter your project name to open the gantt chart workspace.
2. Add tasks: Create group tasks then add subtasks beneath them. Set start and end dates to generate bars on the timeline.
3. Adjust timing: Drag bars to move dates or grab the edges to extend or shorten durations.
4. Customize: Hover or click a task to assign members change colors link dependencies or mark milestones.
5. Save and share: Data auto-saves to your device. Take a screenshot to share your plan with your team.