Create professional project schedules with our free Mermaid.js Gantt chart builder. Easily generate, preview, and export clean syntax for Markdown documentation.
AI Generation Prompt
Technical Specification: Free Mermaid.js Gantt Chart Builder
Overview
This single-file application is a specialized productivity tool designed to help developers and project managers create Gantt chart syntax for Mermaid.js. By providing a structured, visual interface, users can generate complex Gantt diagrams without manually typing tedious syntax.
Features
- Visual Editor: Real-time form fields for project title, task names, start dates, end dates, and task statuses (active, done, crit, blank).
- Dependency Builder: A simple dropdown/select interface to link tasks as dependencies.
- Live Preview: Integrated Mermaid.js renderer for immediate visual feedback of the chart structure.
- Code Export: One-click "Copy to Clipboard" functionality for the raw syntax block.
- Syntax Validator: Real-time checking to ensure the generated code follows valid Mermaid.js structure.
UI Layout
- Header: Clean, minimalist title with a short description of the tool.
- Main Content Area (Split-Screen):
- Left Panel (Inputs): A scrollable form containing sections for General Settings, Task List, and Configuration Options.
- Right Panel (Preview): A sticky panel displaying the rendered chart and the raw syntax output box.
- Responsive Design: On mobile devices, the layout switches to a vertical stack, with the form appearing above the preview.
Color Palette & Aesthetics
- Palette: Use a clean, professional palette (Inter font family, light grays #F9FAFB for backgrounds, whites #FFFFFF for cards, and primary electric blues #2563EB for interactive elements).
- Styling: Use high-quality box shadows (
shadow-sm,shadow-md) to separate elements. Avoid harsh borders. - Transitions: Apply
transition-all duration-300 ease-in-outto all interactive inputs and buttons to ensure a smooth, premium feel.
Technical Implementation
- Architecture: One single HTML file. Tailwind CSS via CDN. Mermaid.js via CDN.
- State Management: Use a JavaScript object to hold the application state. Update the DOM reactively whenever a form field changes.
- Browser Constraints:
- Strictly NO localStorage or cookies. If a user refreshes, the app state will reset.
- All interactivity (modals for "copied to clipboard" success messages) must be custom HTML/CSS elements. DO NOT use
alert(). - All external documentation links must use
target="_blank" rel="noopener noreferrer".
- Performance: Debounce the Mermaid rendering function to prevent layout thrashing while the user is typing.
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Files being used
Frequently Asked Questions
Everything you need to know about using this application.
What is Mermaid.js?
Mermaid.js is a powerful JavaScript-based diagramming and charting tool that uses text-based definitions to render complex diagrams. It is widely used in modern documentation platforms like GitHub, GitLab, and Notion to visualize project timelines and processes without requiring external image files. By using simple text syntax, developers and project managers can version-control their charts directly within their Markdown files. This ensures that documentation stays synchronized with project updates without needing to re-export graphics.
How do I use this Gantt chart builder?
Simply interact with the intuitive form fields to input your project title, specific tasks, durations, and dependencies. As you modify the fields, the application dynamically updates the preview pane and regenerates the standard Mermaid syntax in the export area. Once satisfied with the visualization, you can copy the raw syntax block with a single click. This code can then be pasted directly into any Markdown editor or platform that supports Mermaid.js rendering.
Does this tool save my charts?
This application operates as a stateless, client-side utility, meaning it does not utilize local storage, cookies, or server-side databases to store your progress. All data exists only in your current browser session and will be cleared if you refresh the page. We recommend copying your generated code into your own documentation repository or a secure text file immediately after creation. This approach ensures your project timelines remain secure and version-controlled within your existing development workflow.
Is the generated syntax compatible with all platforms?
Yes, the syntax produced is compliant with the standard Mermaid.js library specifications. This ensures maximum compatibility across various documentation tools, wikis, and project management platforms that have integrated Mermaid support. If your platform does not render the chart immediately, ensure that Mermaid.js support is enabled in your environment's settings. Since the tool produces clean, standard-compliant code, it should work seamlessly in any environment where Mermaid is supported.
