A free record book for your Sleeper fantasy football league — no account, no gatekeeping.
Fantasy Almanac started as a tool one longtime Sleeper commissioner built for his own league, because years of history were buried and basically un-browsable inside the app. It grew into a free site that works for any Sleeper NFL league: you paste your league ID (or link), and it assembles a complete record book — all-time records, a hall of fame of the best seasons and weeks, head-to-head rivalries, champions and last-place finishers, live standings and playoff odds, draft grades, and format-specific tools for dynasty and keeper leagues.
Everything runs in your browser. When you enter a league ID, your browser reads that league’s public data directly from Sleeper’s API and builds the almanac on the spot. There is no account to create, nothing to install, and no server storing your information. The link you generate updates itself every time it’s opened, so standings, scores, odds, and recaps stay current all season.
Anyone in a Sleeper NFL league who likes stats, history, and a little trash-talk fuel. It’s built to be useful to a brand-new league and a decade-old one alike, and to adapt to how your league is actually set up — scoring quirks, superflex, IDP, divisions, dynasty, or keepers.
The site is free and always will be. To cover hosting, it runs unobtrusive advertising on the league pages — never anything that gates the features. Because the tool reads only public league data and stores nothing on a server, there’s no personal profile being built. For the full details, see the privacy policy.
Questions, bugs, or feature ideas are welcome at hello@fantasy-almanac.com.