Stop paying for
cards you already own.
Compare your Magic: The Gathering collection against any decklist instantly. Find your gaps, optimize your purchases, and save money on your next build.
Designed for players who use
From list to cart in seconds.
Three simple steps to build your next deck smarter.
Add Your Collection
Import your entire collection via CSV or paste it in. We securely store your inventory so it's always ready to check against.
Paste Any Decklist
Found a spicy new Commander deck? Just copy the text list and paste it directly into DeckGaps. No formatting required.
Fill the Gaps
We instantly calculate exactly what you're missing. Export a precise shopping list tailored for TCGplayer Mass Entry.
Stop buying duplicates by mistake.
When you have thousands of cards spread across binders and boxes, it's easy to forget what you own. DeckGaps gives you an instant "Yes/No" on whether you need to buy a card for your new deck.
- Exact name matching algorithms
- Handles split cards and MDFCs
- Ignores set-specific printing differences to save money
Analyze multiple decks at once.
Building 3 commander decks at the same time? Our premium multi-deck analysis finds overlapping staples. If all 3 decks need a Sol Ring but you only own 2, we'll tell you to buy exactly 1 more.
You need 3x Lightning Greaves across all lists, but only own 1 in your collection. You need to buy 2 more.
Everything a collector needs.
Collection Insights
View total unique cards, completion percentages, and identify your most valuable staples.
Saved Decks
Store your decklists securely in the cloud to check against later as your collection grows.
TCGplayer Export
One-click copy format specifically designed for TCGplayer's Mass Entry tool.
Set Completion
Track exactly how close you are to completing full sets like 'Alpha' or 'Modern Horizons 3'.
Secure Storage
Your collection data is stored locally in your browser for free users, or securely synced for premium.
Location Tracking
Know exactly which binder or deckbox holds your valuable cards.
Get Organized. Save Money.
Frequently Asked Questions
Is DeckGaps really free?
Yes! The core functionality of analyzing a single decklist against your collection is completely free and always will be. We offer Premium for power users who want cloud sync, multi-deck analysis, and advanced stats.
How do I import my collection?
You can copy-paste any standard list of cards (Quantity Name) or upload CSV exports from popular tools like TCGplayer, Moxfield, or Archidekt.
Does it care about which set my card is from?
By default, DeckGaps checks for card names. If you need a 'Sol Ring' for a deck, and you own a Commander 2013 version, it counts as owned. This is designed to save you money by utilizing printings you already possess.
Stop guessing. Start building.
Join the smart collectors who know exactly what they have and exactly what they need.
Get Started For FreeNo credit card required. Setup takes 30 seconds.