DeckSpec is a free online price guide and collection tracker for trading card game enthusiasts. It covers Magic: The Gathering, Pokémon, Yu-Gi-Oh!, One Piece, Riftbound, and Disney Lorcana, bringing card values and market movements together in one place. Users can search for individual cards, monitor prices over time, estimate the value of a deck or bulk list, and track a collection. The site also highlights trending cards and game-specific risers, with views covering recent price changes and new releases.

DeckSpec offers guides to help users understand card pricing, rarity, market data, and the expected value of opening booster boxes, as well as tutorials explaining its features. Its card information and pricing draw on sources including Scryfall for Magic, pokemontcg.io for Pokémon, and YGOPRODeck for Yu-Gi-Oh!. DeckSpec describes prices as indicative rather than offers to buy or sell. The service is available without an account or login, and its card data is not paywalled. The project is unaffiliated with the trading card brands it covers.