Gantt Chart Maker - 2026 Pricing, Features, Reviews & Alternatives

Timeline Task Planner (Gantt Chart Maker) is a high-performance COM add-in that transforms Microsoft Excel into an enterprise-grade project management environment. Tailored for tech-savvy project managers, engineers, and consultants, it eliminates manual shape drawing and brittle grid formulas by providing a native calculation and visualization engine right inside your spreadsheets.

Key Technical Capabilities & Specifications:

Native Excel Integration: Runs directly as a secure COM Add-in within Microsoft Excel on Windows 10 and 11 environments. Keeps 100% of your project data stored in standard local .xlsx workbooks.

Automated Timeline Engine: Type or paste task data into standard grid rows to instantly render responsive visual timelines, milestones, and task bars.

Advanced Dependency Logic: Connect tasks using standard Predecessor and Successor relationships (Finish-to-Start, Start-to-Start, Finish-to-Finish, Start-to-Finish). Schedule delays cascade downstream automatically across linked dependencies.

Resource & Holiday Calendars: Define custom working calendars, set specific rest days, and import regional corporate holiday lists. The system dynamically skips non-working days for accurate net duration calculations.

Baseline vs. Actual Variance Analysis: Lock baseline schedule estimates and overlay actual execution progress bars directly on the chart to spot bottlenecks and scope creep early.

Granular Calendar Scaling: Switch chart scales on the fly across Daily, Weekly, Monthly, Quarterly, or Yearly views, complete with full ISO week numbering support.

Pro Reporting & Customization: Export high-density vector diagrams to presentation-ready PDFs and customize all chart shapes and themes using native Excel formatting tools.

Data Security & Privacy: Zero vendor-specific cloud lock-in. Your sensitive project information never leaves your local workstation or internal enterprise network.