GanttProject online
Open a GanttProject file online, free
Someone sent you a .gan file, or you want to look at your plan from a computer without GanttProject? Drop it here and see it as a Gantt chart in seconds: phases, tasks, dependencies and resources. No sign-up and no Java to install.
Up to 10 MB. The file is not stored.
How to open a .gan file in three steps
Upload the file
Drag the .gan file into the box above or choose it from your computer. It is the file GanttProject saves by default.
View the plan
A read-only Gantt chart opens with the task tree, dates, durations, dependencies, milestones and progress. The list shows the same plan row by row.
Keep working online
With a free account the plan becomes a Planitude project: edit it from any browser, invite your team and export it to Microsoft Project XML.
What is a .gan file?
GAN is the format of GanttProject, the free desktop application for Windows, macOS and Linux. It is an XML file that holds the tasks with their hierarchy, start dates and durations, dependencies, milestones, progress, resources and holidays.
GanttProject runs on a single computer and the file travels by email or shared folder. Opening it online is useful when you are on another device, when the person who has to read the plan doesn’t have GanttProject, or when the team wants to work on the same plan at the same time.
What you see in your file
Task tree
Phases and subtasks at every level, in the order of the file, with a WBS code for each row.
Dates and durations
Start, finish and duration of each task, on a timeline you can zoom from days to quarters.
Dependencies
Finish-to-start, start-to-start, finish-to-finish and start-to-finish links, with their lag in days.
Milestones
Key dates drawn as diamonds, as in GanttProject.
Progress
The percent complete you entered for each task, on the bar and in the list.
Resources
The people assigned to each task, next to the task name.
The file is not stored
The file is processed in memory on servers in the European Union, in Germany, just long enough to draw the Gantt chart, then discarded. We do not save it or read it for any other purpose.
If you choose to edit it, the file stays in your browser until you create an account and confirm the import: only then does it become a project, visible to you and the people you invite.
Other ways to open a .gan file
The viewer is the quickest way to read a plan. Depending on what you need, these are the alternatives.
GanttProject desktop
Free and open source: the natural choice if you plan alone on one computer. It has to be installed on every machine and doesn’t support working together on the same plan.
Export from GanttProject
GanttProject can export to PDF, PNG, CSV and Microsoft Project XML: useful for sending a snapshot, but the copy doesn’t update when the plan changes.
Spreadsheet
A CSV export opens in Excel or Google Sheets, but dependencies and the timeline are lost: you get a table, not a Gantt chart.
Planitude
Opens the file in the browser and, with a free account, lets you edit it with your team, from any device, and export it to Microsoft Project XML.
GanttProject file questions
Can I use GanttProject online?
GanttProject is a desktop application and has no online version. On this page you can open its .gan files in the browser, and with a free Planitude account you can keep working on them online.
Do I need to sign up?
No, you don’t need an account to view the file. A free account is only needed if you want to edit the plan and save it.
Are dependencies and resources kept?
Yes. The viewer reads tasks, phases, dependencies with their type and lag, milestones, progress and resource assignments. Custom columns are not shown.
Is my file stored?
No. It is read in memory to draw the Gantt chart and then discarded. It is only saved if you create an account and confirm the import.
Why won’t my file open?
The usual causes are a damaged file or a file over 10 MB. Try opening it in GanttProject and saving it again, or export it to Microsoft Project XML and open that file in the MPP viewer.
Can I convert a GanttProject file to Microsoft Project?
Yes. Import the .gan file into Planitude with a free account and export it to Microsoft Project XML, which Project opens and can save as .mpp.