Passive Voice Detector
Paste a draft. The detector underlines every form of "be" + past participle it can spot, counts the sentences with at least one, and tells you the percentage. Style guides — Strunk & White, the AP, the Economist — suggest keeping passive voice under 10%. Reads in your browser, nothing leaves your machine.
Heuristic: about 85% accurate on plain prose. Catches the most common shapes; misses some "got + pp" passives.