An elegant blackjack table in your side panel — full casino rules, splits, doubles, insurance and a leaderboard.
Users
133
+35 in 30 days
Rating
5.0 / 5
unchanged in 30 days
Ratings
3
0 in 30 days
Store rank
#70K
#63K among extensions
Version
1.3.0
updated 30 Oct 2026
Users
monthly, 4 months
Latest, 12 Nov 2026:133 usersMove the mouse over the chart for any month
Ratings count
monthly, 4 months
Latest, 12 Nov 2026:3 ratingsMove the mouse over the chart for any month
The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.
About Royal 21 Blackjack
Royal 21 Blackjack brings the excitement of a real casino straight to your browser's side panel. Play authentic blackjack with full casino rules, including splitting pairs, doubling down, insurance bets, and natural blackjacks. Challenge yourself to make the best decisions, climb the leaderboard, and become the ultimate card master.
🎲 Features
♠️ Authentic casino blackjack gameplay
🃏 Split pairs and play multiple hands
💰 Double Down and Insurance options
🏆 Global leaderboard to compete with other players
💾 Automatic game progress saving
⚡ Instant play from Chrome's side panel
🎯 Smooth controls and elegant casino-inspired design
🌙 Lightweight, fast, and works offline
Whether you're a beginner learning the basics or an experienced blackjack player looking to sharpen your strategy, Royal 21 Blackjack delivers a polished and immersive card game experience without leaving your browser.