Gantt Designer
auto-schedule
File
New project
Welcome screen…
Open JSON…
Save JSON
Import CSV / Excel…
Export…
PDF·PNG·XLSX
Copy link to project
Edit
Task details…
F2 / dbl-click
Undo
Ctrl+Z
Redo
Ctrl+Y
Duplicate task / branch
Delete
Del
Indent
Tab
Outdent
Shift+Tab
Insert
Task below
Enter
Task above
Shift+Enter
Sub-task of selected
Ctrl+Enter
Milestone ◆
Project
Calendar & working days…
✓
Auto-schedule dependants
View
Day scale
Week scale
Month scale
Quarter scale
✓
Task names on bars
day/week
Expand all sub-tasks
Collapse all sub-tasks
Go to today
#
Task
Start
End
Dur
Effort
%
Assignee
+
Edit task
✕
Name
Structure
Make sub-task
Promote
Add sub-task
Milestone (single date, shown as a diamond)
Start
End
Duration
e.g. 4h · 3d · 2w · 1mo
Effort
work, not dates
Progress —
0%
Assignee
Colour
Predecessors
row + type + lag, e.g. 2FS; 4SS+2; 7FF-1
Pinned — auto-schedule won't move this task
Notes
Delete
Cancel
Save
Project calendar
Working days
Duration mode
Working days (skip non-working)
Calendar days
Hours per working day
Exceptions
holidays & one-off working days
＋ Add exception
Cancel
Apply
Map columns
Field
Source column
Cancel
Import
Export
Format
PNG image
PDF
Excel (.xlsx) — raw data
Scale
1×
2×
3×
4×
Background
White
Transparent
Page
A4
A3
Letter
Orientation
Landscape
Portrait
Include project title & export date header
Cancel
Export
Click a cell to type · Enter below / Shift+Enter above / Ctrl+Enter sub-task · hover between rows for ＋ · drag rows, slide right/left to nest
Gantt Designer
Plan timelines, dependencies and working days — entirely in this file. Nothing leaves your machine.
Resume where you left off
—
Start blank
An empty plan. Type a task name in the blank row and press Enter — Tab fills in dates.
Open the sample plan
A small worked example — 12 tasks with phases, dependencies, milestones and effort.
Open a project…
A JSON file saved from this app.
Import CSV / Excel…
Bring in a spreadsheet — you'll map its columns to fields.
Don't show this on startup
Tip: everything is undoable —
Ctrl
+
Z