Free Online Gantt Chart Tool
A Gantt chart shows your project as a horizontal timeline: tasks stacked vertically, each one drawn as a bar spanning its start and end dates. Dependencies are drawn as connecting lines. Milestones are marked as diamonds. At a glance, you can see what's happening now, what comes next, and which tasks would create a bottleneck if they slipped.
gantt-chart.io is a free online Gantt chart tool. Open it in a browser, start adding tasks, and you have a working Gantt chart in under two minutes. No account required, no download, no credit card, no 14-day trial that turns into a billing email.
What You Can Do With a Free Online Gantt Chart
Build a project timeline. Enter tasks, set start dates, and assign durations. The tool draws the bars automatically and keeps the timeline to scale.
Set task dependencies. Connect tasks so the chart shows that Task B cannot start until Task A finishes. When you move Task A, Task B's position updates automatically.
Mark milestones. Flag key dates -- a client review, a product launch, a funding deadline -- as milestone markers. These appear as distinct visual markers on the timeline rather than bars.
Assign owners. Label each task with a person or team. This makes the chart readable for stakeholders who need to know who is responsible for each part of the project.
Track the critical path. The critical path is the sequence of tasks that determines the minimum project duration. If any task on the critical path slips, the project end date slips. gantt-chart.io highlights the critical path so you know where to focus.
Share a read-only link. Generate a share link and send it to clients, executives, or contractors. They can view the full timeline in a browser without creating an account.
Who Uses Free Online Gantt Charts
Gantt charts are useful whenever a project has multiple tasks with different durations, some of which depend on others completing first. That covers more situations than people expect.
Freelancers and independent consultants use Gantt charts to share a project schedule with clients at kickoff. It sets expectations, makes your process visible, and gives you a reference point for scope change conversations.
Small teams at startups use them for product launches, feature releases, and onboarding process design. Tools like Linear and Jira track individual tickets, but a Gantt chart shows how the work fits together across a timeline.
Project managers at agencies use them to coordinate across multiple clients and deliverables simultaneously. A Gantt chart per client engagement makes it easy to see where the workload peaks are.
Students and academics use them for thesis planning, group projects, and research timelines. Many academic projects have strict deadline sequences (IRB approval before data collection, data collection before analysis) that a Gantt chart makes explicit.
Operations and process teams use them for initiatives like system migrations, office moves, compliance audits, and vendor transitions -- anything that has a sequence of steps, a fixed end date, and multiple people involved.
Feature Comparison: Free Gantt Chart Tools
| Feature | gantt-chart.io | Google Sheets | Excel | Notion Timeline | Trello (Power-Up) |
|---|---|---|---|---|---|
| Native Gantt chart | Yes | No (workaround) | No (workaround) | Partial | No |
| Dependency tracking | Yes | No | No | No | No |
| Critical path | Yes | No | No | No | No |
| Shareable read-only link | Yes | Yes (with permissions) | No | Yes (with workspace) | No |
| No account required | Yes | No | No | No | No |
| Setup time | Under 2 minutes | 30--60 minutes | 30--60 minutes | 10--20 minutes | 15+ minutes |
| Cost | Free | Free | Included with Microsoft 365 | Free tier available | Free tier available |
| Mobile | Yes (view) | Yes | Limited | Yes | Yes |
What Makes a Gantt Chart Tool "Good"
Not all online Gantt chart tools are the same. The differences that matter most in practice:
Dependency cascading. When you move a task's start date, all downstream dependencies should shift automatically. Tools that make you manually update each dependent task create more work than they save.
No-friction sharing. The point of a Gantt chart is often to show someone -- a client, a manager, a contractor -- what the plan is. If sharing requires both parties to have accounts, you'll stop using the sharing feature. A shareable link that works in any browser removes that friction.
A data model built for scheduling. Some tools add a "Gantt view" on top of a task list or kanban board. This creates awkward tradeoffs between how the data is structured for the board view and how it needs to work for timeline scheduling. A tool built for Gantt charts from the start handles durations, dependencies, and date math correctly without workarounds.
Speed of editing. Projects change. A tool where updating a date or adding a task takes multiple clicks and confirmations is frustrating in practice. The best Gantt chart tools let you drag bars to change dates, click to add tasks, and see updates instantly.
How to Build Your First Gantt Chart in 5 Minutes
Step 1: List your tasks. Write down every major task in the project. Don't worry about perfect granularity -- you can add subtasks later. A good starting point is 5--15 tasks for a typical project.
Step 2: Estimate durations. For each task, estimate how many days it will take. If you're not sure, make a range estimate and use the midpoint for planning. You can adjust later.
Step 3: Identify dependencies. Go through your task list and ask: "Can this start before anything else finishes?" For each task that has a prerequisite, note which task must finish first.
Step 4: Enter into gantt-chart.io. Open gantt-chart.io, set your project start date, and enter each task with its duration. Connect dependent tasks. Add milestones for key dates.
Step 5: Share and iterate. Generate a share link and send it to your team or client. Use it as the reference document in your kickoff meeting. Update it as the project progresses -- drag bars to reflect actual vs. planned dates.
Common Gantt Chart Mistakes to Avoid
Tasks that are too long. A task labeled "Development" that spans six weeks tells you nothing useful. Break it down. "Backend API development," "Frontend integration," "QA testing," and "Bug fixes" are four separate tasks with different owners and durations. The granularity is what makes a Gantt chart actionable.
Missing dependencies. If you don't connect tasks that actually depend on each other, the chart is misleading. A chart showing testing starting on the same day as development makes the project look shorter than it is.
No buffer for unknowns. Real projects have unexpected delays. A Gantt chart with every task starting exactly when the previous one ends has zero slack. Add small buffer tasks at phase transitions -- "QA buffer: 3 days" -- to absorb predictable unpredictability.
Building the chart and never updating it. A Gantt chart that reflects the original plan but not the actual project state is worse than no chart, because it creates false confidence. Update the chart weekly at minimum. It takes five minutes.
Starting too late. The best time to build a Gantt chart is before the project starts. The second best time is right now. Even if the project is already underway, a Gantt chart built mid-project helps you see how much time remains, which tasks are overdue, and what the revised end date looks like.
Frequently Asked Questions
Q: Is gantt-chart.io really free?
Yes. The core Gantt chart functionality is free with no account required. You can create charts, set dependencies, add milestones, and share them without creating an account or entering payment information.
Q: Can I export my Gantt chart to PDF or PNG?
Yes. gantt-chart.io supports export to image and PDF formats, which is useful for sharing in documents or presentations where a live link isn't practical.
Q: How many tasks can I add?
There is no enforced limit on the number of tasks in a single project. Gantt charts with 50--100 tasks are common for complex projects.
Q: Can multiple people edit the same Gantt chart?
You can share the edit link with your team for collaborative editing. The share link generates a read-only view for external stakeholders who should see but not modify the chart.
Q: How is this different from using a spreadsheet?
A spreadsheet Gantt chart (Excel or Google Sheets) requires you to manually format bars, manually update dependencies, and manually recalculate dates when anything changes. gantt-chart.io does all of this automatically. The practical difference is 30 minutes of setup vs. under 2 minutes, and manual vs. automatic dependency cascading whenever the plan changes.
Start building your free online Gantt chart at gantt-chart.io: free, no account required.