Newick Builder (v.0.3) is a JavaScript application, written by Alix Boc (March 2011), to create a Newick string from a tree drawn using the HTML5 Canvas utility. This application has been originally designed to be used on a touch screens such as tablets (e.g., iPad).

• Draw lines


• Select branch(es) and node(s):
  • Draw a line that intersects with the branch(es) to be selected.
  • Draw a circle around the node(s) to be selected. If you encircle a node, all the branches connected to this node will be selected.


• Delete branch(es) and node(s):
  • First, select the branch(es) or node(s) to be deleted.
  • Click on the "Delete Selection" button on the toolbar (on the bottom of the screen). All selected elements will be deleted.
  • Click on the "Delete All" button on the toolbar to clear the canvas.


• Edit leaves:
  • Click on an external node (i.e., a leaf) to define its label.


• Move branch(es) and node(s):
  • First, select the branch(es) or node(s) to be moved.
  • If you drew a circle to select branch(es) or node(s), click inside the circle, move the selection and then release it.


• View Newick String:
  • Click on the "Newick String" button that will allow you to display a Newick String (this option will work only if the tree you drew is a valid phylogenetic tree).

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