Weak-Key & Error Analyzer
Generic practice treats every key equally, but your actual mistakes almost never do. Most typists have a small handful of keys, often three to six, that account for a disproportionate share of their errors: an awkward reach, a finger that hasn't quite learned its assignment, or a key your brain keeps confusing with its neighbor. Fixing those specific keys moves your accuracy far more than another round of undifferentiated practice.
This tool watches every keystroke during your drill, both which keys you get wrong and which ones take noticeably longer to reach, then ranks them. "Most-missed" counts raw error rate; "slowest" measures the time between consecutive keystrokes, which tends to catch awkward reaches even when you eventually get the key right.
Type the drill below at a natural pace. When you finish, you'll get a ranked list of your weak points and a button to generate a focused practice set built entirely from those keys, so your very next drill is aimed exactly where it'll help most.
Run a diagnostic drill
Type naturally, don't slow down deliberately.
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Why this beats generic drilling
Deliberate practice, the kind backed by skill-acquisition research, works by isolating the specific sub-skill that's holding you back rather than repeating the whole task at large. For typing, that sub-skill is almost always a small set of individual keys, not your typing "in general." Run this diagnostic every so often, especially after you feel a plateau, since your weak keys change as you improve: today's problem key becomes fluent, and a new one takes its place.