CoNLL-U Tree Browser/Editor

Instructions

Use the file picker to load a CoNLL-U file (multiple sentences/trees are supported).
Use Prev/Next buttons or press < and > keys to navigate sentences.
Edits in the textbox are automatically saved to the current tree when you navigate.
Use the “Hide/Show Editor” toggle to show or hide the editable tree textbox.
The table and analysis update automatically based on the current textbox content.
Press Shift+X to export your current trees as a .conllu file.

Keyboard Shortcuts

Navigation

Joining/splitting words (e.g. split ill to i 'll")

Be careful - these are difficult to undo!
Click on word 1, press + (shift =): This joins w1 with the next word w2. The resulting word inherits the properties of w1.
Click on word 2, press - (next to +). This joins w2 with the previous word w1. The resulting word inherits the properties of w2.
Click on word 1, press /. You will be prompted to enter at least two words. The resulting words inherit the properties of w1.

Changing part of speech

Click on a word.
Press N (noun), V (verb), J (adjective), A (adverb), D (discourse particle), X (AUX), P (ADP, i.e. preposition), M (PROPN, i.e. name). (all are capitals, i.e. shift n, shift v, shift j, ...

Changing root of a sentence

Changing a visible dependency's head or deprel

Click on the DEPREL label (the "pill").
1. Enter the values in the popup box, press "enter"/"Apply" to confirm; "escape"/"Cancel" to escape. OR
1a. Press Shift+left/right arrow to change its head.
1b. Press b (nsubj), o (obj), i (iobj), m (advmod), d (discourse), t (topic / "dislocated"), p (parataxis), c (ccomp), x (xcomp), a (advcl), l (acl:relcl), k (acl), v (vocative).

Adding a (visible) dependency (= changing a invisible dependency's head or deprel)