diff --git a/components/CollectionListing.tsx b/components/CollectionListing.tsx
index 32c363b..c067611 100644
--- a/components/CollectionListing.tsx
+++ b/components/CollectionListing.tsx
@@ -226,11 +226,10 @@ const renderItem = (
   return (
     <div ref={provided.innerRef} {...provided.draggableProps} className="mb-1">
       <div
-        className={`${
-          currentPath === `/collections/${collection.id}`
+        className={`${currentPath === `/collections/${collection.id}`
             ? "bg-primary/20 is-active"
             : "hover:bg-neutral/20"
-        } duration-100 flex gap-1 items-center pr-2 pl-1 rounded-md`}
+          } duration-100 flex gap-1 items-center pr-2 pl-1 rounded-md`}
       >
         {Icon(item as ExtendedTreeItem, onExpand, onCollapse)}
 
diff --git a/components/ModalContent/NewLinkModal.tsx b/components/ModalContent/NewLinkModal.tsx
index 20bcef2..46c9ffe 100644
--- a/components/ModalContent/NewLinkModal.tsx
+++ b/components/ModalContent/NewLinkModal.tsx
@@ -109,7 +109,6 @@ export default function NewLinkModal({ onClose }: Props) {
         toast.success(`Created!`);
         onClose();
       } else toast.error(response.data as string);
-
       setSubmitLoader(false);
 
       return response;
diff --git a/lib/api/controllers/links/postLink.ts b/lib/api/controllers/links/postLink.ts
index eb82949..0301bca 100644
--- a/lib/api/controllers/links/postLink.ts
+++ b/lib/api/controllers/links/postLink.ts
@@ -87,6 +87,29 @@ export default async function postLink(
     return { response: "Uncaught error.", status: 500 };
   }
 
+  const user = await prisma.user.findUnique({
+    where: {
+      id: userId,
+    },
+  });
+
+  if (user?.preventDuplicateLinks) {
+    const existingLink = await prisma.link.findFirst({
+      where: {
+        url: link.url?.trim(),
+        collection: {
+          ownerId: userId,
+        },
+      },
+    });
+
+    if (existingLink)
+      return {
+        response: "Link already exists",
+        status: 409,
+      };
+  }
+
   const numberOfLinksTheUserHas = await prisma.link.count({
     where: {
       collection: {
@@ -126,7 +149,7 @@ export default async function postLink(
 
   const newLink = await prisma.link.create({
     data: {
-      url: link.url,
+      url: link.url?.trim(),
       name: link.name,
       description,
       type: linkType,
diff --git a/lib/api/controllers/users/userId/updateUserById.ts b/lib/api/controllers/users/userId/updateUserById.ts
index e4e5726..f2b5e91 100644
--- a/lib/api/controllers/users/userId/updateUserById.ts
+++ b/lib/api/controllers/users/userId/updateUserById.ts
@@ -190,6 +190,7 @@ export default async function updateUserById(
       archiveAsPDF: data.archiveAsPDF,
       archiveAsWaybackMachine: data.archiveAsWaybackMachine,
       linksRouteTo: data.linksRouteTo,
+      preventDuplicateLinks: data.preventDuplicateLinks,
       password:
         data.newPassword && data.newPassword !== ""
           ? newHashedPassword
diff --git a/pages/settings/preference.tsx b/pages/settings/preference.tsx
index 2456e92..1d5a2e0 100644
--- a/pages/settings/preference.tsx
+++ b/pages/settings/preference.tsx
@@ -16,6 +16,8 @@ export default function Appearance() {
   const { account, updateAccount } = useAccountStore();
   const [user, setUser] = useState<AccountSettings>(account);
 
+  const [preventDuplicateLinks, setPreventDuplicateLinks] =
+    useState<boolean>(false);
   const [archiveAsScreenshot, setArchiveAsScreenshot] =
     useState<boolean>(false);
   const [archiveAsPDF, setArchiveAsPDF] = useState<boolean>(false);
@@ -32,6 +34,7 @@ export default function Appearance() {
       archiveAsPDF,
       archiveAsWaybackMachine,
       linksRouteTo,
+      preventDuplicateLinks,
     });
   }, [
     account,
@@ -39,6 +42,7 @@ export default function Appearance() {
     archiveAsPDF,
     archiveAsWaybackMachine,
     linksRouteTo,
+    preventDuplicateLinks,
   ]);
 
   function objectIsEmpty(obj: object) {
@@ -51,6 +55,7 @@ export default function Appearance() {
       setArchiveAsPDF(account.archiveAsPDF);
       setArchiveAsWaybackMachine(account.archiveAsWaybackMachine);
       setLinksRouteTo(account.linksRouteTo);
+      setPreventDuplicateLinks(account.preventDuplicateLinks);
     }
   }, [account]);
 
@@ -144,6 +149,13 @@ export default function Appearance() {
           <p className="capitalize text-3xl font-thin inline">Link Settings</p>
 
           <div className="divider my-3"></div>
+          <div className="mb-3">
+            <Checkbox
+              label="Prevent duplicate links"
+              state={preventDuplicateLinks}
+              onClick={() => setPreventDuplicateLinks(!preventDuplicateLinks)}
+            />
+          </div>
 
           <p>Clicking on Links should:</p>
           <div className="p-3">
diff --git a/prisma/migrations/20240305045701_add_merge_duplicate_links/migration.sql b/prisma/migrations/20240305045701_add_merge_duplicate_links/migration.sql
new file mode 100644
index 0000000..873a36e
--- /dev/null
+++ b/prisma/migrations/20240305045701_add_merge_duplicate_links/migration.sql
@@ -0,0 +1,2 @@
+-- AlterTable
+ALTER TABLE "User" ADD COLUMN     "preventDuplicateLinks" BOOLEAN NOT NULL DEFAULT false;
diff --git a/prisma/schema.prisma b/prisma/schema.prisma
index 6bdc8de..64c7b86 100644
--- a/prisma/schema.prisma
+++ b/prisma/schema.prisma
@@ -43,6 +43,7 @@ model User {
   accessTokens            AccessToken[]
   subscriptions           Subscription?
   linksRouteTo            LinksRouteTo          @default(ORIGINAL)
+  preventDuplicateLinks   Boolean               @default(false)
   archiveAsScreenshot     Boolean               @default(true)
   archiveAsPDF            Boolean               @default(true)
   archiveAsWaybackMachine Boolean               @default(false)