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Drag-and-drop project timeline with dependencies, critical path and SVG/PNG export.
Tasks
6
2 milestones
Project span
36 days
2026-09-01 →
On critical path
4
zero slack — any slip moves the end date
Average progress
28%
Drag a bar to reschedule it, drag either end to resize, and drag a diamond to move a milestone. Timeline spans 41 days at the day scale.
| Task | Start | End | Days | Slack | |
|---|---|---|---|---|---|
| Requirements & scope | 2026-09-01 | 2026-09-05 | 5 | 3d | |
| User research | 2026-09-04 | 2026-09-09 | 6 | 27d | |
| Design systemCP | 2026-09-09 | 2026-09-15 | 7 | 0d | |
| Wireframes signed off | 2026-09-16 | 2026-09-16 | 1 | 20d | |
| Backend API | 2026-09-16 | 2026-09-27 | 12 | 2d | |
| Frontend buildCP | 2026-09-16 | 2026-09-29 | 14 | 0d | |
| QA & bug fixingCP | 2026-09-30 | 2026-10-05 | 6 | 0d | |
| LaunchCP | 2026-10-06 | 2026-10-06 | 1 | 0d |
Dependencies are finish-to-start. Slack is computed with a forward and backward pass over the dependency graph, using the dates you entered as each task's duration; anything with zero slack is on the critical path, so a one-day slip there pushes the whole project. Your plan is saved in this browser only — export the JSON to keep it or move it to another device.
Gantt Chart Maker lets you build a project timeline with draggable task bars, phases, milestones, percent-complete and finish-to-start dependencies, then computes slack and highlights the critical path. It saves to your browser and exports SVG, PNG, CSV or JSON. No account needed.
Build a real project timeline in the browser — no account, no trial, no seat licence. Add tasks with start and end dates, drag the bars to reschedule or resize them, group work under phases, set a percent-complete that fills the bar, add milestones as diamonds, and link tasks so that one finishes before the next begins. Those links are not just arrows: the tool runs a proper forward-and-backward pass over the dependency graph to compute each task's slack and highlight the critical path, so you can see which slip actually moves the end date and which does not. Dependency cycles are detected and reported rather than silently ignored. The timeline scales from days to weeks to months, shades weekends, and marks today. Everything autosaves to this browser, and you can export the chart as an SVG or PNG for a deck, or as CSV and JSON to move the plan somewhere else — and import that JSON back later.
Gantt Chart Maker allows you to build functional project schedules directly in your browser without requiring an account, trial, or paid subscription. It provides advanced scheduling features like critical path calculation, dependency links, and slack analysis that are rarely found in free, zero-setup tools. Data autosaves locally to your browser and can be exported cleanly as SVG, PNG, CSV, or JSON for presentations and external tools.
Good to know: Because data is stored locally in your browser rather than a cloud database, collaborative real-time editing with multiple team members is not supported.
Learn how to build, schedule, and export a professional project timeline with critical path analysis in minutes.
Add tasks and group into phases
Enter your project tasks with start and end dates, and organize your work under distinct phases.
Schedule and adjust task bars
Drag the interactive bars directly on the timeline to easily reschedule or resize task durations.
Link tasks and track milestones
Establish finish-to-start dependencies and add milestone diamonds to mark critical project checkpoints.
Analyze the critical path
Review automatically computed task slack and highlighted critical path to identify scheduling bottlenecks.
Export or save your timeline
Your progress autosaves to the browser, and you can export your chart as SVG, PNG, CSV, or JSON.
Estimated time: PT3M
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