MTG Deck Tools

Free deck analysis tools for Magic: The Gathering players. Calculate probabilities, analyze your mana base, and check for missing staples — all in your browser.

These tools help you build better MTG decks by answering the questions that matter: How often will I draw my key card? Is my mana base reliable? Am I missing format staples? Every tool runs entirely in your browser — no signup, no server, no card data stored. Card data provided by Scryfall.

Hypergeometric Calculator

Calculate the probability of drawing specific cards by any turn. Answer questions like "What's the chance I see Sol Ring by turn 3?" for any deck size and copy count.

Mana Curve Analyzer

Paste a decklist and instantly see your mana curve, color distribution, land count analysis, and mana base health. Supports Commander, Modern, Standard, and more.

Deck Staples Checker

Check your Commander deck for commonly-played staples by color identity. Find out which essential cards you might be missing and why they matter.

Available now

Densa Deck Pro

The full deck laboratory — goldfish simulation, matchup testing, version tracking, power level rating, AI coach, and more. One-time purchase, $39.99 launch week, yours forever.

Goldfish Simulation

Run thousands of solo games to measure deck speed and consistency.

Matchup Gauntlet

Test your deck against 11 archetype opponents and find your weaknesses.

Version Tracking

Save deck versions, compare changes, and track improvement over time.

Power Level Rating

1-10 power level with detailed breakdown — perfect for Rule 0 conversations.

Report Export

Export full analysis as JSON, Markdown, or styled HTML reports.

Mulligan Practice

Interactive training mode to sharpen your opening hand decisions.

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This tool is not affiliated with or endorsed by Wizards of the Coast. Magic: The Gathering and its logos are trademarks of Wizards of the Coast LLC. Card data provided by Scryfall.