Trade analyzer for your Sleeper dynasty league
FleeceRoom is a trade analyzer built around Sleeper. Instead of typing players into a generic calculator, you paste your league once and every page knows your roster, every other roster, your scoring and your lineup settings. It's free and needs no sign-in.
Getting your league in
On the start page, paste any of these:
- Your league's link from sleeper.com: open your league and copy the address bar.
- Your league ID: in the Sleeper app, open your league, tap the settings (gear) icon at the top right, scroll to the very bottom and copy the League ID.
- Your Sleeper username: FleeceRoom lists your dynasty leagues this season to pick from.
FleeceRoom shows the league's name, number of teams and format and asks "is this your league?" before it loads, then asks which team is yours. Next time you open FleeceRoom, it goes straight back to where you were.
FleeceRoom works with Sleeper dynasty leagues of this season with 8 to 16 teams, 1QB or Superflex, at any PPR setting. Redraft and keeper leagues aren't supported yet.
What it reads from Sleeper
Only public league data, through FleeceRoom's own server (your browser never talks to Sleeper directly, and no login is involved):
- the league's scoring, lineup and roster settings;
- the teams, their rosters, IR and taxi squads;
- the schedule and the scores so far;
- traded picks, drafts and the playoff bracket.
Player details, weekly projections and stats come from Sleeper every night and are shared by all leagues. FleeceRoom never writes anything to your league.
What the analysis shows
For any trade, FleeceRoom shows:
- both sides on the calculator (FantasyCalc's values in your format), with the two-for-one value adjustment;
- what each team gains in its own values: a contender, a bubble team and a rebuilding team value the same player differently;
- lineup points a week each team gains or loses, from each team's best lineup every week;
- every team's playoff and title odds before and after, from 10,000 simulated seasons, when you ask for them;
- roster cuts a trade would force, and who would be cut.
You can look at the league as any manager with the View as switch, which is how you see a trade from your partner's side before you send it.
More than one trade
Add trades to your Plan to see your team after two or three of them, with the trades applied in order for both teams. Trade ideas suggests trades across the whole league, and the Trade page finds a fair offer from every team for a player you want to sell.
Frequently asked questions
Do I need to give FleeceRoom my Sleeper password?
No. FleeceRoom reads Sleeper's public league data with your league ID or username only. There's no login of any kind.
Where do I find my Sleeper league ID?
In the Sleeper app, open your league, tap the settings (gear) icon at the top right and scroll to the very bottom. On the web, the ID is in your league's address on sleeper.com.
Can I send the trade from FleeceRoom?
No. FleeceRoom can copy a short message for your trade partner, but you propose the trade in Sleeper yourself.
Is my league's data stored?
Your settings and plans stay in your browser. League data is fetched from Sleeper when you open the league and cached briefly by FleeceRoom's server; nothing about you is kept.