Welcome to **CR Deck Builder** - the ultimate tool for mastering Clash Royale! Whether you're climbing through arenas, competing in tournaments, or dominating clan wars, our AI-powered platform helps you create **guaranteed winning decks** in seconds. With cutting-edge Google Gemini AI integration, military-grade security, and innovative features like battle simulation and one-click copying, we're revolutionizing how players build decks.
🤖 Two Powerful Generation Modes
AI Mode
Powered by Google Gemini AI
- **Guaranteed best results** - AI analyzes millions of matches
- **Meta-aware** - Understands current trends
- **Perfect synergies** - Optimal card combinations
- **3-5 seconds** - Lightning fast generation
- **100% secure** - AES-256-GCM encryption
Pro Algo
Advanced Algorithm Mode
- **No API key needed** - Works instantly
- **Proven algorithms** - Based on win rates
- **Instant generation** - No waiting
- **Balanced decks** - Perfect for all arenas
- **100% free** - No limits
🔒 Military-Grade Security
Your privacy and security are our top priorities. When you use AI Mode, your Gemini API key is protected with **enterprise-level encryption**:
AES-256-GCM Encryption
Your API key is encrypted using the same military-grade encryption used by banks and governments. Impossible to decrypt without your device.
Device-Bound Storage
Your key is bound to your specific device and browser. Even if someone steals your encrypted data, they can't use it.
Local-Only Storage
Your API key **never leaves your browser**. It's stored locally on your device only. We never see or store your key on our servers.
Session Protection
Protected against session hijacking and XSS attacks. Your key is safe even if someone gains access to your browser session.
✨ Powerful Features
5 Deck Archetypes
Choose from proven deck strategies:
- • **Beatdown** - Heavy tanks, massive pushes
- • **Control** - Defend and counter-push
- • **Bait** - Bait spells, punish opponents
- • **Cycle** - Fast rotation, chip damage
- • **Siege** - Attack from your side
Include/Exclude Cards
**Include:** Force specific cards in your deck. Build around your favorites or ensure your win condition is included.
**Exclude:** Remove cards you don't have, don't like, or aren't leveled up. Perfect for customization!
Browse Library
Access all **110+ Clash Royale cards** in our interactive library. Search, filter by rarity/elixir/type, and manually build your perfect custom deck. Great for experimenting with unique combinations!
One-Click Copy to Game
The **fastest way to test decks**! Generate a deck and copy it directly to Clash Royale with a single click. Opens CR automatically and pastes your deck. No manual card selection needed!
Battle Simulator (Test Arena)
**Test your decks before playing!** Our real-time Clash Royale simulation lets you play cards, watch troops battle, and practice strategies. Learn elixir management and card interactions risk-free!
Deck Shop
Browse **curated meta decks** for all arenas, challenges, and tournaments. Each deck includes strategy guides, card explanations, and one-click copying. Updated regularly with the latest meta!
🚀 How to Use AI Mode
- 1. Get Your Free Gemini API Key
Visit Google AI Studio, click "Create API Key", and copy your key. It's completely free!
- 2. Add API Key to CR Deck Builder
Click "Set API Key" button, paste your Gemini API key, and click "Save Key". Your key is encrypted with AES-256-GCM and stored locally on your device only.
- 3. Select AI Mode
Choose AI mode from the mode selector. You'll see the Gemini AI badge indicating it's active.
- 4. Choose Your Strategy
Select a deck archetype (Beatdown, Control, Bait, Cycle, or Siege). Optionally add cards to include/exclude.
- 5. Generate Your Perfect Deck
Click "Generate Deck" and wait 3-5 seconds. AI analyzes millions of matches to create your guaranteed winning deck!
- 6. Copy to Game & Dominate
Click "Copy to Game" to instantly copy your deck to Clash Royale. Test in battle simulator first if you want to practice!
🏆 Why Choose CR Deck Builder?
Built by players, for players. We believe everyone deserves access to the best deck-building tools. **No registration, no ads, no premium tiers** - just pure, powerful deck generation that helps you win more matches and climb the ladder faster!
🎮 Ready to Dominate?
Join thousands of players who are already using CR Deck Builder to create winning decks and climb the ladder. Whether you're in Arena 1 or Legendary Arena, our AI-powered tools give you the competitive edge you need!
Start building winning decks today! 👑⚔️