exact solver · no login · nothing uploaded
The best legal lineup, proved in ~20 ms
A free NFL DFS optimizer that does the math exactly: DraftKings and FanDuel rules, your projections, your locks. Bring a CSV, hit Optimize, and get the provably best lineup plus four real alternatives — no account, no subscription, nothing leaves your browser.
Build your lineup
114.8 pts114.8 points = the exact DraftKings optimum on this site's 146-player sample slate at $50,000 of $50,000 — every number on every page comes from the same engine. Paste your own slate for the real thing.
All 7 NFL DFS tools
free, no signupNFL DFS Optimizers
View category →How the optimizer works
Exact, not greedy
A dynamic-programming solver proves the printed lineup is the best legal combination under your numbers — the same knapsack math paid optimizers use, ~20 ms per solve, in your browser.
Your numbers, your rules
Every salary and projection is editable; paste a CSV in seconds. Lock your QB-WR stack, exclude the injury-risk names, cap players per team — the solver adapts exactly.
Honest about limits
No daily-updated projections, no news feed, no betting advice — the sample slate is labeled as a sample, and every page says what the tools can't know.
What this site does — and what it does not
- Provably optimal lineups — exact knapsack solver, DraftKings and FanDuel rules.
- Your data stays yours — every tool runs client-side, nothing uploaded.
- The full research bench — value math, salary lanes, stacks, score simulations.
- Not a projections service — the default slate is a labeled sample; bring your own numbers.
- Not affiliated with any platform — DraftKings, FanDuel and Rotowire are their own trademarks.
- No betting advice — DFS involves real risk; the math is honest, the outcomes aren't promised.