phpSyntaxTree allows you to generate graphical syntax trees from labelled bracket notation phrases.
Enter a phrase above using labelled bracket notation. Click "Draw" to create a syntax tree graph for the entered phrase. You can right-click on the generated tree image to copy-and-paste it into your documents, or left-click the tree image to download it.
To create a node with subscript parts, separate the subscript part using the _ character. For example "NP_1" will show in the graph as NP1. Optionally, select Auto subscript, to automatically number all equally named nodes (NP1, NP2 etc.).
Disable color and/or smooth lines to create a more black & white printer friendly image.