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Untap.in
Play-test collectible and trading card game decks online against other players with Untap.in.
About Untap.in
Untap.in is a free, browser-based platform for play-testing collectible and trading card game (CCG/TCG) decks, with no required downloads or installations. It is an independent, fan-built service with no official affiliation to any card game publisher, and supports more than 40 popular card game titles, including Magic: The Gathering, Pokémon TCG, and Yu-Gi-Oh!, working across desktop, tablet, and mobile devices.
Users can build decks using full card databases, import existing decklists via plain text or URL, and test decks in a variety of ways: live matches against global opponents, solo practice against an empty seat, or booster drafts with bot-filled pods for missing players. The platform also supports spectating live matches and replaying finished games turn by turn, and allows users to upload custom cards to test homebrew card games.
It is suited for TCG/CCG players looking to test deck builds before physical play, competitive players practicing strategies, and creators developing custom card games who need a virtual play space.
Key features
- Build decks from full card databases for 40+ TCG/CCG titles
- Import existing decklists via plain text or URL from popular sites
- Play live matches against global opponents via public or private tables
- Solo test decks, opening hands, and lines against an empty seat
- Run booster drafts with friends, bots fill empty pod seats
- Spectate live matches and replay finished games turn by turn
Best for: It is best for trading and collectible card game players, deck builders, and homebrew card game creators who want to test decks without physical components.
Good for
- No downloads or installations required, runs entirely in web browsers
- Supports play-testing for 40+ popular TCG and CCG titles
- Works across desktop, tablet, and mobile devices
- Supports custom card uploads for homebrew game testing
Watch out for
- Does not enforce official game rules, requiring users to track rules manually
- Some niche features like Deck vs Deck mode require optional supporter perks
Untap.in at a glance
- Website
- untap.in
- Category
- Gaming › Game Guides, Wikis & Tools
- Type
- Website
- Pricing
- Freemium
- Platforms
- Android, Web
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
Untap.in alternatives
Tools and sites you could use instead, ranked by how closely they match.
Build, share, and review card decks with YGOPRODeck, which also provides card data and a price checker for Yu-Gi-Oh.
Read news and browse databases for Pokémon games, trading cards, and the television series.
5etools provides tools for players and Dungeon Masters playing 5th Edition Dungeons & Dragons.
Chartopia lets role-playing game players create, discover, and manage random tables and generators.
Browse Pokémon TCG tournament results, deck lists, and articles through Limitless.
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Untap.in FAQ
Is Untap.in free to use?
Yes, core play-testing features including deck building, solo testing, drafting, and live multiplayer are free. Optional supporter perks are available to help cover server costs.
Do I need to download software to use Untap.in?
No, the platform runs entirely in web browsers on desktop, tablet, and mobile devices, with no required downloads or patches.
Can I import existing decklists to Untap.in?
Yes, you can import decklists via plain text paste or URL from popular deck-building sites.
Can I test custom or homebrew card games on Untap.in?
Yes, you can upload custom card assets and build decks for homebrew games, with no rule enforcement so you can play however you choose.
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