MTG Deck Builder
The free MTG deck builder, with AI and built for every format
Build Magic: The Gathering decks right in your browser — Commander, Standard, Modern, Pioneer, Legacy, Vintage, Pauper and Brawl. AI suggestions, build from your collection, import and export to Arena and MTGO, live prices and full stats. No install, no paywall.
Everything you need to brew
AI suggestions
Card recommendations as you build, from an AI that understands the rules and your deck.
Build from your collection
Switch to “only what I own” and brew with the cards you already have — see what you’re missing before you buy.
Import & export
Bring lists from Moxfield, Archidekt, MTG Arena or MTGO, and export them back in one click.
Every format
Commander, Standard, Modern, Pioneer, Legacy, Vintage, Pauper and Brawl — with live legality checks.
Stats & prices
Mana curve, color and type breakdowns, plus live prices from Cardmarket and TCGPlayer.
Playtest & play online
Test your opening hands and play your deck online with friends in the browser — no download.
Why build on Counterdeck
- 01
Free, with no paywall and no ads. Build all the decks you want.
- 02
The only deck builder that’s natively in English, Spanish and French — cards in any of Magic’s languages too.
- 03
Part of a full suite: collection tracker, zero-fee marketplace, online play simulator, forum and an AI rules assistant.
Frequently asked
Is the deck builder free?
Yes. Building decks is completely free — no paywall, no ads, no card required to start.
Is there a Commander (EDH) deck builder?
Yes — full Commander support with a command zone, power brackets and live legality checks.
Can I build with the cards I own?
Yes. Track your collection and filter the builder to “only what I own” to see exactly what you’re missing.
Does it work as a TCGplayer deck builder?
Yes — Counterdeck is a free MTG deck builder with live TCGplayer and Cardmarket prices, so you see your deck’s cost as you build and can buy the cards you’re missing in one click.
Is it a Magic deck creator too?
Yes — Counterdeck is a free Magic deck creator: build a new deck from scratch or import one, then refine it with AI suggestions, live prices and one-click playtesting. Deck builder and deck creator, same tool.
Start building your deck
Create a free account and build your first deck in two minutes. No credit card, no commitment.