Project Tasks
Add your tasks
Result
Your output will appear here.
This free Gantt chart generator turns a task list into a visual project timeline. Set the project start date, add each task with its start day and duration, and get a Gantt chart. Use your browser's print command (Ctrl/Cmd+P) to save it as a PDF. It suits project managers, freelancers, students and small teams. It runs in your browser and needs no sign-up.
Add your tasks
Your output will appear here.
Each task becomes a bar placed on the calendar by its start day and stretched by its duration.
Plan in days from the project start, so shifting the whole plan means changing one date.
Use your browser's print command (Ctrl/Cmd+P) to save the chart as a PDF to share with clients, managers or your team.
Start days plus durations show where every task ends and when the whole project finishes.
Three steps from a blank form to a result you can use.
Enter the Project start date. Every task is placed relative to this date.
For each task, enter a name, a start day offset and a duration in days.
Get the Gantt chart in the Result panel, then use your browser's print command (Ctrl/Cmd+P) to save it as a PDF, or copy it into your own document.
A Gantt chart shows a project schedule as horizontal bars on a timeline. This generator builds one from three numbers per task, so you can see overlaps, gaps and the finish date before work starts.
To make one task follow another, set its start day offset to the earlier task's offset plus its duration. That simple rule does most of the work of a scheduling calculator.
A Gantt chart is a bar chart that illustrates a project schedule. Tasks run down the vertical axis, time runs along the horizontal axis, and the length of each bar shows how long that task takes. It is named after Henry Gantt, who designed it around 1910 to 1915, although Karol Adamiecki published a similar chart earlier.
Read a Gantt chart for four things:
Gantt charts are easy to read without training, which is why clients and managers like them. Their weakness is relationships: in all but simple projects, charts that draw every link between tasks get cluttered quickly. For complex dependency analysis, a critical path network diagram communicates links better.
Example: a small agency plans a website launch. This is an illustration of the inputs and the end days they produce.
| Task | Start day offset | Duration (days) | End |
|---|---|---|---|
| Discovery and sitemap | 0 | 3 | 3 |
| Design mockups | 3 | 7 | 10 |
| Write page copy | 3 | 8 | 11 |
| Build pages | 11 | 10 | 21 |
| Testing and fixes | 21 | 5 | 26 |
| Launch | 26 | 1 | 27 |
Design and copy both start on day 3, so they run in parallel. The build waits for both, so its offset is 11, the later of their two end points (3 + 7 = 10 and 3 + 8 = 11). The final task ends on day 27, which means the project needs 27 days from the start date.
The chart makes one risk obvious: copy is the longest task before the build. If copy slips by three days, every later bar moves by three days. The agency decides to start copy on day 1 by writing the sitemap and copy outline together.
A Gantt chart is only as good as the task list behind it. We suggest these rules when you fill in the generator:
This generator builds a clear visual plan. It is not a full scheduling system, so keep these limits in mind:
Before you share the chart, check that every task has a sensible duration, that parallel tasks are not assigned to the same person and that the last bar ends before your deadline. When the plan needs owners, status updates and changes that ripple through the schedule, a project management tool such as Onethread can hold the same tasks as live work.
Quick answers about the Gantt Chart Generator.
Enter your Project start date, then add each task with a name, a start day offset and a duration in days. Click generate and the Gantt chart appears in the Result panel. To save it as a PDF, use your browser's print command (Ctrl/Cmd+P). No account, download or payment is needed.
It is the number of days after the project start date that a task begins. An offset of 0 means the task starts on the project start date, and an offset of 5 means it starts five days later. Using offsets lets you move the whole plan by changing only the start date.
For each task, add its start day offset and its duration. The highest result across all tasks is the number of days the project needs from the start date. The generator shows this visually, because the right edge of the last bar marks the planned finish of the project.
You can plan them through offsets. When a task must wait for another, set its offset to the earlier task's offset plus its duration, so it starts when that task ends. The generator does not draw link arrows or move tasks automatically, so update later offsets yourself if an earlier task slips.
The generator works in plain days from your start date and does not know your weekends, holidays or team leave. If your team works five days a week, add the non working days into each task's duration or offsets so the bars match the real calendar your team follows.
A simple timeline marks key dates or events along one line. A Gantt chart lists every task on its own row with a bar showing when it starts and how long it lasts. That makes overlaps, sequences and the planned finish date easy to see, which is why project teams use it for scheduling.
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