Extensions for underdogfantasy.com
25 browser extensions built for underdogfantasy.com. Compare features, permissions, and safety across Chrome, Firefox, and Edge.
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DraftSharks Sync
Pulls your fantasy football rosters, league info, and draft picks from the top commissioning services.
—3.22.8
Chrome Web StoreDraft Hero Live Sync for Fantasy Football
Sync your 2026 Fantasy Football League settings and draft picks with Draft Hero
Chrome Web StoreFlock Fantasy Draft Overlay
Draft overlay for Underdog, DraftKings, ESPN, Yahoo, and Sleeper fantasy football drafts
Chrome Web StoreLegendary Upside Sidekick
Provides an overlay on bestball contests to assist in drafting.
Chrome Web StoreInside Edge: Player Intel
Get instant matchup scores and Inside Edge's renowned player insights on your favorite fantasy and sports sites.
Chrome Web StoreBest Ball Overlay
Real-time portfolio-level intelligence for best ball drafters. Track shares and correlations across every lineup.
Draft Caddy
Draft Caddy is the best NFL best ball drafting tool available. Includes configurable best ball draft settings and customized data overlays on Underdog, DraftKings, and Drafters. Also supports uploading your custom ADP rankings for use during drafts.
5.02.3
Edge Add-onsBaseball Savant Button
Adds Baseball Savant buttons next to player names on fantasy sites.
Chrome Web StoreDraft Room Extension
Draft Room Extension enriches your draft experience by pulling live updates of the selected players in your drafts.
RotoGrinders - Underdog Tools
This extension displays RotoGrinders' individual player stat projections on Underdog Fantasy
—5.05.0
Firefox Add-onsBaseball Savant Button
Adds a small 📊 button next to player names on fantasy sites to open the player's Baseball Savant page in a floating preview.
Chrome Web StoreDraftCompass Pro
Level up your drafts by integrating customized rankings sources and user-specific insights into Sleeper draft-rooms.
Chrome Web StoreBestBall Edge — Draft Assistant
Draft overlay for best ball. Matchup badges, stack indicators, value scores, and scarcity.
Chrome Web StoreUnderdog Exposure Overlay
Overlays your exposure % on Underdog Fantasy draft boards. Navigate to any exposure page and click Scrape.
Chrome Web StoreAXIOM War Room
Live draft assistant for DraftKings, Underdog Best Ball & ESPN Redraft
Firefox Add-onsDraft Room Extension
Draft Room Extension enriches your draft experience by pulling live updates of the selected players in your drafts.
Chrome Web StoreMFF Underdog Draft Helper
Live Underdog draft picks from Jack's rankings + BBM advance-rate optimizer. Stacks, cliffs, and live PPG-by-position projections.
Draft Optics Assistant
Real-time draft overlay for Best Ball & DFS
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Firefox Add-onsTHE SOLVER Draft Assistant
Draft Assistant for Fantasy Drafts
Chrome Web StoreUnderdog Caddie
Live best ball exposure overlay for Underdog draft rooms.
Chrome Web StoreSweeptheSlate
Live draft companion for Underdog best ball, daily & salary — exposure, stacks, player combos, similar teams, and auto-saved drafts.
My Fantasy Scores
Auto-sync ESPN, Fantrax, CBS, Underdog, FIFA Fantasy, and RTS Sports credentials to keep your My Fantasy Scores leagues up to date.
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Firefox Add-onsUnderdog BestBall Overlay
No description
Chrome Web StoreBurholme $$$ Machine
Advisory draft overlay for Underdog best ball: best-available board, pick tips, roster tracker, and stack/bye hints.
Chrome Web StoreDraft Logic — ADP & Rankings Assistant
Overlay for Underdog best ball drafts: live value-vs-ADP board and stack recommendations from your own rankings.