TreeFern opens cladograms stored as JSON files. Try one of the samples from the menu, or open your own file. Your edits are kept in this browser; use Save or Download to write a .json file.
| Ctrl+K | Command palette: every action, by name |
| S | Add a sister clade (same keys as below once the box is open) |
| A or D | Add daughter clades. In the name box, Enter adds it, Shift+Enter adds it and starts a daughter of it, Shift+Tab adds it and starts a sister, and Tab moves to the info |
| E or R | Edit name and info |
| C | Collapse or expand |
| K | Colour the clade and everything in it |
| Delete / Backspace | Delete the clade and its descendants |
| X, then V | Cut a subtree, paste it under the selected clade |
| Esc | Cancel a cut, or clear the selection |
| Ctrl+Z / Ctrl+Shift+Z | Undo / redo (also Ctrl+Y) |
| Arrow keys | Up: heaviest daughter. Down: mother. Left/Right: sisters |
| F / Home | Focus on the clade / fit the whole tree |
| Ctrl+F | Search |
| 1 2 3 4 | Standard / Disks / Rectangular cladogram / Circular cladogram layout |
| Shift+D | Dark mode |
| + - [ ] , . | Spread, shrink and curl (Standard layout) |
| Ctrl+O / Ctrl+S | Open / save a file |
| Ctrl+E | Export an image of the view or the whole tree |
TreeFern is free software under the GNU GPL v3. Desktop versions for Windows and Linux are on GitHub.
TreeFern