Deckr is a free Clash Royale deck builder that runs in the browser, at deckr.lucasbittencourt.dev. It rolls 8-card decks from the cards you choose, shows the average elixir cost and the 4-card cycle, and opens the deck straight in the game. It works without an account, in English and Portuguese.
What it does
- Roll a deck from your card pool: every card, only those unlocked up to an arena, or your own pick.
- Smart roll: decks built around meta archetypes (Hog Cycle, Log Bait, Golem, LavaLoon, X-Bow and more), with a win condition, support, defense, spells and cycle. Each group shows in a square that explains what its cards are for.
- Build card by card, with search by name and filters by elixir and arena, drag cards to reorder them and lock the ones a new roll should keep.
- Open in Clash Royale, copy the deck link or share it from your phone. You can also paste a deck link from the game.
- Save decks in this browser, or in your account if you log in.
Log in with Clash Royale (optional)
With your player tag and an official Clash Royale API key, Deckr shows your profile (trophies, win rate, King level), current deck, collection, recent battles (with each opponent's deck, ready to try) and upcoming chests. Your collection can become your card pool, so rolls only use the cards you have.
The key is free at developer.clashroyale.com; Deckr shows the steps and the IP address to allow on the key.
Privacy
Without logging in, everything stays in your browser. When you log in, Deckr keeps your tag, your profile data and your API key encrypted, and uses no advertising cookies or analytics. The details are in the Privacy policy.
Deckr is a fan project, not official or endorsed by Supercell; game data comes from the official Clash Royale API, under Supercell's Fan Content Policy.