diff --git a/aimenet-web/lib/aime-card.ts b/aimenet-web/lib/aime-card.ts
new file mode 100644
index 0000000..0e24ba6
--- /dev/null
+++ b/aimenet-web/lib/aime-card.ts
@@ -0,0 +1,20 @@
+/**
+ * Generates a random Aime card id.
+ */
+export function generateAimeCardId(): string {
+    let id: string;
+
+    do {
+        id = Math.floor(Math.random() * 1e20).toString().padStart(20, '0');
+    } while (id[0] === '3'); // https://gitea.tendokyu.moe/Dniel97/segatools/src/commit/37c26ecadb2ce4d2cb3a61ce96c2c931ba2fc346/aimeio/aimeio.c#L191
+    
+    return id;
+}
+
+/**
+ * Validates the provided card id by known parameters
+ * @param id The card id to validate
+ */
+export function validateAimeCardId(id: string): boolean {
+    return id[0] !== '3' && /^[0-9A-F]{20}$/i.test(id);
+}
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