Choose a constraint or click a preset, then type in the box. The lab counts words and flags anything that breaks the current rule. For lipograms and univocalics, blocking forbidden vowels is supported at the keystroke/paste level when "Block" is checked. The syllable and sentence counters use quick heuristics, so expect occasional misclassifications—good enough for practice, not for dictionary-level scansion. In Pilish mode, the digit “0” represents a 10-letter word. Your text auto-saves locally in this browser.