diff --git a/index.html b/index.html
index 76627b9..df88528 100644
--- a/index.html
+++ b/index.html
@@ -50,20 +50,20 @@ <h1 class="text-3xl font-bold mb-6">Subdomain Checker</h1>
             btn.setAttribute("disabled", true);
             btn.innerHTML = "Checking Domain...";
 
-            fetch(`https://api.freesubdomains.org/check?domain=${subdomain.value}.${domain.value}`).then(res => res.json()).then(data => {
+            fetch(`https://api.freesubdomains.org/check?domain=${subdomain.value.trim().toLowerCase()}.${domain.value}`).then(res => res.json()).then(data => {
                 btn.removeAttribute("disabled");
                 btn.innerHTML = "Check Domain";
 
                 if(data.message === "DOMAIN_AVAILABLE") {
                     status.classList = "text-green-600 font-semibold";
-                    status.innerHTML = `Congratulations, ${subdomain.value}.${domain.value} is available! <a href="https://github.com/free-domains/register#register" class="underline underline-2 hover:no-underline">Register now!</span>`;
+                    status.innerHTML = `Congratulations, ${subdomain.value.trim().toLowerCase()}.${domain.value} is available! <a href="https://github.com/free-domains/register#register" class="underline underline-2 hover:no-underline">Register now!</span>`;
                 } else {
                     status.classList = "text-red-600 font-semibold";
-                    status.innerHTML = `Sorry, ${subdomain.value}.${domain.value} is unavailable!`;
+                    status.innerHTML = `Sorry, ${subdomain.value.trim().toLowerCase()}.${domain.value} is unavailable!`;
                 }
 
                 form.reset();
             })
         }
     </script>
-</html>
\ No newline at end of file
+</html>