diff --git a/README.md b/README.md
index 5335519..20e0ca3 100644
--- a/README.md
+++ b/README.md
@@ -42,3 +42,11 @@ This application is created using [Godot game engine](https://godotengine.org/)
   * `Helpers` directory is for classes that are used for getting various data without creating a specific model or attaching to a Godot scene node;
   * `Models` contains models classes to work with the game data and application settings;
   * `Scenes` contains Godot engine scene files and scripts attached to root nodes of scenes with matching name.
+
+## Creating a SQLite database from the game data
+
+Run `create_crafting_db.py` to convert `crafting_data.json` into a SQLite database.
+
+The script creates `crafting_data.db` by default and stores item information and all recipe details for offline use.
+
+Use `query_crafting_db.py <item name>` to print a dependency tree for an item from the generated database.
diff --git a/create_crafting_db.py b/create_crafting_db.py
new file mode 100644
index 0000000..9ff3a09
--- /dev/null
+++ b/create_crafting_db.py
@@ -0,0 +1,108 @@
+import argparse
+import json
+import sqlite3
+from pathlib import Path
+
+
+def build_database(json_path: Path, db_path: Path) -> None:
+    data = json.loads(json_path.read_text())
+    conn = sqlite3.connect(db_path)
+    cur = conn.cursor()
+
+    cur.executescript(
+        """
+        PRAGMA journal_mode = WAL;
+        PRAGMA synchronous = NORMAL;
+
+        CREATE TABLE IF NOT EXISTS items (
+            id INTEGER PRIMARY KEY,
+            name TEXT,
+            tier INTEGER,
+            rarity INTEGER,
+            icon TEXT,
+            extraction_skill INTEGER
+        );
+
+        CREATE TABLE IF NOT EXISTS recipes (
+            id INTEGER PRIMARY KEY AUTOINCREMENT,
+            item_id INTEGER,
+            output_quantity INTEGER,
+            level_requirement INTEGER,
+            FOREIGN KEY(item_id) REFERENCES items(id)
+        );
+
+        CREATE TABLE IF NOT EXISTS recipe_ingredients (
+            recipe_id INTEGER,
+            ingredient_id INTEGER,
+            quantity INTEGER,
+            FOREIGN KEY(recipe_id) REFERENCES recipes(id),
+            FOREIGN KEY(ingredient_id) REFERENCES items(id)
+        );
+
+        CREATE TABLE IF NOT EXISTS recipe_possibilities (
+            recipe_id INTEGER,
+            quantity INTEGER,
+            chance REAL,
+            FOREIGN KEY(recipe_id) REFERENCES recipes(id)
+        );
+        """
+    )
+    conn.commit()
+
+    cur.execute("BEGIN")
+    for item_id_str, item in data.items():
+        item_id = int(item_id_str)
+        cur.execute(
+            "INSERT OR REPLACE INTO items (id, name, tier, rarity, icon, extraction_skill) "
+            "VALUES (?, ?, ?, ?, ?, ?)",
+            (
+                item_id,
+                item.get("name"),
+                item.get("tier"),
+                item.get("rarity"),
+                item.get("icon"),
+                item.get("extraction_skill", -1),
+            ),
+        )
+        for recipe in item.get("recipes", []):
+            level_req = recipe.get("level_requirements")
+            lvl = level_req[0] if level_req else None
+            cur.execute(
+                "INSERT INTO recipes (item_id, output_quantity, level_requirement) VALUES (?, ?, ?)",
+                (item_id, recipe.get("output_quantity"), lvl),
+            )
+            recipe_id = cur.lastrowid
+            for ing in recipe.get("consumed_items", []):
+                cur.execute(
+                    "INSERT INTO recipe_ingredients (recipe_id, ingredient_id, quantity) VALUES (?, ?, ?)",
+                    (recipe_id, ing.get("id"), ing.get("quantity")),
+                )
+            for qty, chance in recipe.get("possibilities", {}).items():
+                cur.execute(
+                    "INSERT INTO recipe_possibilities (recipe_id, quantity, chance) VALUES (?, ?, ?)",
+                    (recipe_id, int(qty), chance),
+                )
+    conn.commit()
+
+    cur.executescript(
+        """
+        CREATE INDEX IF NOT EXISTS idx_items_name ON items(name);
+        CREATE INDEX IF NOT EXISTS idx_recipes_item ON recipes(item_id);
+        CREATE INDEX IF NOT EXISTS idx_ingredients_ing ON recipe_ingredients(ingredient_id);
+        """
+    )
+    conn.commit()
+    conn.close()
+
+
+def main() -> None:
+    parser = argparse.ArgumentParser(description="Convert crafting_data.json to SQLite database")
+    parser.add_argument("json_path", nargs="?", default="BitPlanner/crafting_data.json", help="Path to crafting_data.json")
+    parser.add_argument("db_path", nargs="?", default="crafting_data.db", help="Output SQLite database path")
+    args = parser.parse_args()
+
+    build_database(Path(args.json_path), Path(args.db_path))
+
+
+if __name__ == "__main__":
+    main()
diff --git a/query_crafting_db.py b/query_crafting_db.py
new file mode 100644
index 0000000..132dff8
--- /dev/null
+++ b/query_crafting_db.py
@@ -0,0 +1,40 @@
+import argparse
+import sqlite3
+from pathlib import Path
+
+
+def query_prerequisites(conn: sqlite3.Connection, item_name: str):
+    cur = conn.cursor()
+    cur.execute(
+        """
+        WITH RECURSIVE deps(id, name, depth, path) AS (
+            SELECT id, name, 0, ',' || id || ',' FROM items WHERE name LIKE ?
+            UNION ALL
+            SELECT ri.ingredient_id, i.name, depth + 1, path || ri.ingredient_id || ','
+            FROM deps
+            JOIN recipes r ON r.item_id = deps.id
+            JOIN recipe_ingredients ri ON ri.recipe_id = r.id
+            JOIN items i ON i.id = ri.ingredient_id
+            WHERE path NOT LIKE '%,' || ri.ingredient_id || ',%'
+        )
+        SELECT id, name, depth FROM deps ORDER BY depth, name
+        """,
+        (item_name,)
+    )
+    for item_id, name, depth in cur.fetchall():
+        print("  " * depth + f"{name} (#{item_id})")
+
+
+def main() -> None:
+    parser = argparse.ArgumentParser(description="Query prerequisites for an item")
+    parser.add_argument("item", help="Item name or substring to search")
+    parser.add_argument("db_path", nargs="?", default="crafting_data.db", help="Path to SQLite database")
+    args = parser.parse_args()
+
+    conn = sqlite3.connect(Path(args.db_path))
+    query_prerequisites(conn, args.item)
+    conn.close()
+
+
+if __name__ == "__main__":
+    main()