Hand the machine a page, ask it to revise, and watch what it corrects away — round after round. Each round is a revision of the last one, so the losses compound. It stops itself when there is nothing left to correct, and round 0 stays beside the ending round for comparison.

Nothing is submitted and nothing is graded. The rounds live in this browser. Your text goes only to the AI provider you chose, and only when you press AI Revise.