Stop Guessing. Start Deciding.
Every week, 3–5 roster decisions determine your season. Fantasy Football Codex gives you a data-backed START or SIT recommendation for every player — powered by Vegas lines, injury reports, weather, historical matchups, and your scoring format.
Syncs with Sleeper · PPR / Half-PPR / Standard aware · No credit card required
The Game Day Problem
You're making your biggest decision of the week with 10 browser tabs open and no clear answer.
What your Game Day looks like now
- ✕Checking 4 different ranking sites that disagree
- ✕Guessing whether the injury report means anything
- ✕Ignoring Vegas lines because you don't know how to read them
- ✕Hoping your gut is right
- ✕Missing the waiver wire because you didn't know who was available
What Game Day looks like with a Decision Board
- ✓One clear START / MONITOR / SIT for every roster player
- ✓Injury context that actually explains the risk
- ✓Vegas-implied fantasy points already calculated for you
- ✓Historical matchup data against this week's opponent
- ✓Waiver alternatives that exclude players already in your league
Multi-Signal Intelligence. One Clear Call.
While other tools give you a single ranking or projection, we synthesize key insights such as injuries, performance trends, game environment, Market Insight, and more — simultaneously.
Vegas & Props Intelligence
Implied team totals and player prop consensus converted directly into fantasy point estimates.
Injury Context
Practice participation, game-day designation, and what it actually means for your lineup decision.
Weather & Game Environment
Dome vs. outdoor, wind speed, precipitation — factors that meaningfully move fantasy scoring.
Performance Trend
Recent week-over-week trajectory, not just season averages. Catches hot streaks and cold spells early.
Your Decision Board, Every Week
See exactly what you're getting — real signals, not generic rankings.
Amon-Ra St. Brown
WR · DET
Vegas projects 9.2 fantasy pts · Trending up 18% · Healthy
87% confidence
Bucky Irving
RB · TB
Favorable matchup (FPA rank 29) · No injury designation
81% confidence
Davante Adams
WR · LA
Game total 43.8 (balanced environment) · Hamstring — limited Wed
52% confidence
Michael Carter
RB · NYJ
Avg 5.1 pts vs this opponent historically · Vegas projects 6.8 pts
31% confidence
*Example output — your actual board reflects your live roster and this week's data.
DFS Intelligence Built In
Playing DFS? The same signal engine powers captain leverage scoring, game environment analysis, and AI-generated slate narratives — so your DFS lineups and season team decisions come from the same source of truth.
Explore DFS Slate →- ⚡Captain pressure scoring
- ⚡Game environment (dome / wind / rain)
- ⚡Salary value index
- ⚡AI slate narratives (via Claude)
Offseason Dashboard
Stay ahead when games aren't on. Depth charts, roster moves, and injury context keep flowing — plus market signals so you know who to target before your league wakes up.
Explore offseason tools →- Roster news — trades, signings, and depth-chart moves in one feed
- Injury tracking — practice reports and designation changes year-round
- Market signals — futures and prop context when Vegas lines are live
- Depth charts — formation starters and positional depth by team
Trusted by Fantasy Football Enthusiasts
Join thousands of managers who are dominating their leagues with data-driven insights.
"I used to spend 2 hours Sunday morning on start/sit decisions. Now I open the Decision Board, read the signals, and I'm done in 10 minutes. It's not even close."
Alex T.
3× League Champion
"The Vegas projection conversion is the feature I didn't know I needed. I've been ignoring the lines for years. Now I actually understand what they mean for my roster."
Jamie R.
Fantasy Enthusiast
"The waiver wire alternatives panel is underrated. It excludes players already owned in my league — so every suggestion is actually available. That alone is worth it."
Morgan K.
DFS Player
Simple, Transparent Pricing
Start free. Upgrade when you're ready to go deeper.
Free
- ✓1 roster
- ✓Decision Board with Start / Monitor / Sit
- ✓3 signal vectors: injury, matchup, trend
- ✓Waiver wire alternatives
Pro
- ✓Unlimited rosters
- ✓All 6 signal vectors
- ✓Vegas market lines + weather
- ✓DFS Slate Intelligence
- ✓Outcomes dashboard
- ✓Historical week-by-week view
League
- ✓Everything in Pro
- ✓Full league sync
- ✓Waiver wire aware (excludes leaguemates' players)
- ✓Commissioner dashboard (coming soon)
- ✓Shared league analytics
Pro includes a 14-day free trial — no credit card required. Cancel anytime.
Frequently Asked Questions
Everything you need to know about Fantasy Football Codex and our plans.
Sleeper is fully supported today. ESPN and Yahoo imports are coming before the 2026 season. You can also build a manual roster in under 2 minutes without connecting any platform.
Your lineup decision is due Thursday night.
Get your Decision Board before your deadline.
No credit card required · Syncs with Sleeper · PPR / Half-PPR / Standard