Commissioner tools, Roster tools, and utilities for Sleeper dynasty leagues. Everything runs in your browser. No signup needed. EXPORT RECOMMENDED TO SAVE DATA LOCALLY.
Click any card to launch the tool. All tools use the public Sleeper API.
Enter your League ID and instantly generate an exportable formatted bylaws document with scoring, roster setup, waiver rules, playoff structure, and more.
Enter your Sleeper username to browse all your dynasty leagues, view rosters by position, see your record, draft capital, and waiver budget.
Weighted lottery system for dynasty rookie drafts. Set team weights, run the draw, and reveal picks one-by-one with animations and confetti.
Load any league, find orphaned teams, view their full roster grouped by position with starters highlighted, and export to CSV for sharing.
LOTL League Specific CharBuilder. Check Char Builds and save/share builds.
Track league buy-ins and payments per owner. Mark paid/unpaid status, add notes, and export the ledger. Data stored locally in your browser. Export to CSV to create Google Sheets
Build custom regular-season schedules, balancing intra-division rivalries over multi-year windows and exporting block matchups to CSV.
Timeline view of all league trades. See players and picks exchanged, filter by team, and view a "who traded the most" leaderboard.
Enter a Sleeper League ID to jump directly to the Bylaws Generator.