Sleeper league ID finder

Sleeper never shows your league ID anywhere in the app. Type your username and get it for every league you are in — no account, nothing to install.

Where the ID lives

On the web it is the long number in the URL when you have a league open:

https://sleeper.com/leagues/1388555898586136576/team
                        └──────────────────┘
                          your league ID

In the mobile app it is not displayed at all. Open League Settings, tap Share League, copy the link, and read the number out of it.

Why it changes every year

Sleeper creates a brand new league object each season and links it to the previous one. So the ID you saved last year is not the one in your address bar today. This matters: hand a tool an old season's ID and it can only see that season and earlier, because the chain is walked backwards — usually with no warning that anything is missing.

The finder above always returns the current season, so you get the whole history.

Now do something with it

Import the league and every season you have played becomes one record book — champions, records, rivalries, careers.

Import your league — free