You're the worst judge of your own photos — you've seen your face in a mirror your whole life, flipped. PhotoDuel fixes that. Upload up to 10 photos, share one private link, and friends vote in head-to-head matchups: A or B, nothing else to decide. An Elo rating — the system chess uses — turns those votes into a ranked result with a win rate for every photo. No account for you or your voters. No ads. Free. Six languages. Galleries sit behind an unguessable link and expire in 30 days.