.GANTT File Extension

Online Gantt Chart

Developer Online Gantt
3.7  |  3 Votes

What is a GANTT file?

A GANTT file is a Gantt chart created by Online Gantt. When opened in Online Gantt, GANTT files appear as bar chart-based project schedules. However, GANTT files are actually renamed .JSON files, which contain plain text data that Online Gantt uses to show a Gantt chart.

More Information

Screenshot of a .gantt file in Online Gantt
GANTT file open in Online Gantt

Gantt charts are bar charts that represent project schedules. A Gantt chart's Y-axis shows the time period in which a project will take place, and its X-axis lists the project's tasks and sub-tasks. Each bar on the chart represents the time period in which the corresponding task is meant to be worked on. As workers make progress on a task, project managers often shade in a corresponding percentage of that task's bar, to show how close the task is to completion.

Online Gantt is a free online tool that allows project managers to create, edit, and export Gantt charts. If an Online Gantt user knows they'll want to continue editing a chart they've created, they can save that chart as a GANTT file. This file contains JSON-formatted data that defines the chart's appearance and various project- and chart-related metadata (such as available project resources and chart settings).

How to open a GANTT file

You can open a GANTT file with Online Gantt (Web). To do so:

  1. Open Online Gantt in your web browser.
  2. Select Open (.gantt file).
  3. Navigate to and open your GANTT file.

Because GANTT files are renamed .JSON files, you can technically also open them with Microsoft Notepad, Apple TextEdit, or any other text editor. However, doing so isn't very helpful. Thus, you're best off opening a GANTT file with Online Gantt.

How to convert a GANTT file

You can use Online Gantt to convert GANTT files to the following formats:

  • .XLSX - Microsoft Excel Spreadsheet
  • .PDF - Portable Document Format
  • .PNG - Portable Network Graphic

To do so, open your GANTT file with Online Gantt, and then click the Export button.

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Programs that open GANTT files


Verified by FileInfo.com

The FileInfo.com team has independently researched the Online Gantt Chart file format and apps listed on this page. Our goal is 100% accuracy and we only publish information about file types that we have verified.

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