Free. In the browser. No scrape.

Build NFL lineups without the paywall.

Upload a DraftKings or FanDuel salary file, edit your projections, and export lineups. Stack & Flex does not take entries and does not sell picks.

Tools

$50,000 cap. QB, two RB, three WR, TE, flex, DST. At least two games.

$60,000 cap and a four-player limit from any one team.

DraftKings captain or FanDuel MVP, plus five flex spots.

A position search is sketched in. Lines are not live.

2026-10-20

What this site does today: browser lineups for DraftKings and FanDuel, with your projections, and what it deliberately does not do.

2026-10-22

Why the optimizer starts from the salary file's points-per-game column, and how to replace those numbers.

2026-10-24

DraftKings lists the Showdown captain as its own player id. Uploading a classic sheet to the Showdown tool will not work, on purpose.