diff --git a/frontend/package.json b/frontend/package.json
index e0386e7..974a918 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -15,10 +15,11 @@
   "dependencies": {
     "@mdi/font": "7.4.47",
     "core-js": "^3.41.0",
+    "iso-3166-1": "^2.1.1",
+    "openapi-fetch": "^0.14.0",
     "roboto-fontface": "*",
     "vue": "^3.5.13",
-    "vuetify": "^3.8.1",
-    "openapi-fetch": "^0.14.0"
+    "vuetify": "^3.8.1"
   },
   "devDependencies": {
     "@eslint/js": "^9.24.0",
diff --git a/frontend/pnpm-lock.yaml b/frontend/pnpm-lock.yaml
index 3f65013..04ba1d6 100644
--- a/frontend/pnpm-lock.yaml
+++ b/frontend/pnpm-lock.yaml
@@ -14,6 +14,9 @@ importers:
       core-js:
         specifier: ^3.41.0
         version: 3.41.0
+      iso-3166-1:
+        specifier: ^2.1.1
+        version: 2.1.1
       openapi-fetch:
         specifier: ^0.14.0
         version: 0.14.0
@@ -1289,6 +1292,9 @@ packages:
     resolution: {integrity: sha512-LpB/54B+/2J5hqQ7imZHfdU31OlgQqx7ZicVlkm9kzg9/w8GKLEcFfJl/t7DCEDueOyBAD6zCCwTO6Fzs0NoEQ==}
     engines: {node: '>=16'}
 
+  iso-3166-1@2.1.1:
+    resolution: {integrity: sha512-RZxXf8cw5Y8LyHZIwIRvKw8sWTIHh2/txBT+ehO0QroesVfnz3JNFFX4i/OC/Yuv2bDIVYrHna5PMvjtpefq5w==}
+
   js-levenshtein@1.1.6:
     resolution: {integrity: sha512-X2BB11YZtrRqY4EnQcLX5Rh373zbK4alC1FW7D7MBhL2gtcC17cTnr6DmfHZeS0s2rTHjUTMMHfG7gO8SSdw+g==}
     engines: {node: '>=0.10.0'}
@@ -3361,6 +3367,8 @@ snapshots:
 
   isexe@3.1.1: {}
 
+  iso-3166-1@2.1.1: {}
+
   js-levenshtein@1.1.6: {}
 
   js-tokens@4.0.0: {}
diff --git a/frontend/src/components/CertificateEditor.vue b/frontend/src/components/CertificateEditor.vue
index 6ddab90..32197e9 100644
--- a/frontend/src/components/CertificateEditor.vue
+++ b/frontend/src/components/CertificateEditor.vue
@@ -1,34 +1,140 @@
 <script setup lang="ts">
 import { ref, useId, useTemplateRef } from "vue";
+import iso3166 from "iso-3166-1";
+import CountryListItem from "./CountryListItem.vue";
+
+// Define interface for a country object
+interface Country {
+  country: string;
+  alpha2: string;
+  alpha3: string;
+  numeric: string;
+}
 
 const formModel = ref(false);
 const formRef = useTemplateRef("form");
 
+// Domain fields
 const domainInputId = useId();
 const domainValue = ref("");
-const primaryDomain = ref("");
 const domains = ref<string[]>([]);
 
+// Subject fields
+const commonName = ref("");
+const emailAddress = ref("");
+const organization = ref("");
+const organizationalUnit = ref("");
+const country = ref("");
+const countryName = ref("");
+const state = ref("");
+const locality = ref("");
+
+// Get user's locale from browser
+const userLocale = ref<string>(navigator.language || navigator.languages?.[0] || 'en-US');
+const userCountryCode = ref<string>(userLocale.value.split('-')[1]?.toUpperCase() || '');
+const userCountry = ref<Country | undefined>(undefined);
+
+// Countries data for autocomplete
+const allCountries = iso3166.all() as Country[];
+const countries = ref<(Country | { divider: boolean; header: string })[]>([]);
+
+// Prepare countries list with user's country at the top
+function prepareCountriesList() {
+  // Find user's country based on browser locale
+  userCountry.value = allCountries.find(c => c.alpha2 === userCountryCode.value);
+
+  // Create the countries list
+  countries.value = [];
+
+  // Add user's country at the top if found
+  if (userCountry.value) {
+    countries.value.push(userCountry.value);
+    countries.value.push({ divider: true, header: 'All Countries' });
+
+    // Add all countries except the user's country to avoid duplicates
+    countries.value.push(...allCountries.filter(c => c.alpha2 !== userCountryCode.value));
+  } else {
+    // Add all countries if user's country not found
+    countries.value.push(...allCountries);
+  }
+}
+
+// Initialize countries list
+prepareCountriesList();
+
+// Certificate settings
+const keyLength = ref(4096);
+const validityDays = ref(365);
+const noExpiry = ref(false);
+
+// Validation rules
 const domainRules = [
   (value: string) => !!value || "A value must be provided to add the domain.",
   (value: string) => new RegExp("^[a-z0-9][a-z0-9.]+$").test(value) || "Invalid domain characters provided. (To use some characters, convert the domain to xn-domain format.)",
 ]
 
+const emailRules = [
+  (value: string) => !value || /^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$/.test(value) || "Invalid email format.",
+];
+
+const keyLengthRules = [
+  (value: number) => value >= 3000 || "Key length must be at least 3000 bits.",
+  (value: number) => value <= 6000 || "Key length must not exceed 6000 bits.",
+];
+
+const validityDaysRules = [
+  (value: number) => !value || value > 0 || "Validity period (in days) must be a positive integer.",
+];
+
+
 function addDomain() {
   if (formRef.value?.errors.some(({id}) => domainInputId === id)) {
     return;
   }
 
-  if (!primaryDomain.value) {
-    primaryDomain.value = domainValue.value;
-  }
   domains.value.push(domainValue.value);
   domainValue.value = "";
+
+  // Set common name to primary domain if not already set
+  if (!commonName.value) {
+    commonName.value = domainValue.value;
+  }
 }
 
 const isSubmitting = ref(false);
 async function submitNewCertificate() {
+  if (!formRef.value?.validate()) {
+    return;
+  }
 
+  isSubmitting.value = true;
+  try {
+    // Extract country code if country is an object
+    const countryCode = typeof country.value === 'object' && country.value !== null
+      ? (country.value as Country).alpha2
+      : country.value;
+
+    // TODO: Implement certificate request submission
+    console.log({
+      type: "STANDALONE_CERTIFICATE",
+      requestedKeyLength: keyLength.value,
+      requestedValidityDays: noExpiry.value ? null : validityDays.value,
+      subject: {
+        commonName: commonName.value,
+        emailAddress: emailAddress.value,
+        organization: organization.value,
+        organizationalUnit: organizationalUnit.value,
+        country: countryCode,
+        state: state.value,
+        locality: locality.value,
+      },
+      extension: {
+        alternativeDnsNames: domains.value,
+      }
+    });
+  } finally {
+    isSubmitting.value = false;
+  }
 }
 
 </script>
@@ -38,41 +144,132 @@ async function submitNewCertificate() {
     ref="form"
     v-model="formModel"
     :disabled="isSubmitting"
-    @submit="submitNewCertificate"
+    @submit.prevent="submitNewCertificate"
   >
     <h2>New certificate</h2>
-    <fieldset>
+
+    <fieldset class="mb-4">
       <legend>Subject details</legend>
+      <v-text-field
+        v-model="emailAddress"
+        label="Email Address"
+        :rules="emailRules"
+        hint="Optional"
+        class="mb-2"
+      />
+
+      <v-text-field
+        v-model="organization"
+        label="Organization"
+        hint="Optional"
+        class="mb-2"
+      />
+
+      <v-text-field
+        v-model="organizationalUnit"
+        label="Organizational Unit"
+        hint="Optional"
+        class="mb-2"
+      />
+
+      <v-autocomplete
+        v-model="country"
+        v-model:search="countryName"
+        :items="countries"
+        item-title="country"
+        item-value="alpha2"
+        label="Country"
+        hint="Search and select your country"
+        class="mb-2"
+      >
+        <template #item="slotProps">
+          <CountryListItem :item="slotProps.item" :props="slotProps.props" />
+        </template>
+      </v-autocomplete>
+
+      <v-text-field
+        v-model="state"
+        label="State/Province"
+        hint="Optional"
+        class="mb-2"
+      />
+
+      <v-text-field
+        v-model="locality"
+        label="Locality/City"
+        hint="Optional"
+        class="mb-2"
+      />
+    </fieldset>
+
+    <fieldset class="mb-4">
+      <legend>Domain Names</legend>
       <v-text-field
         :id="domainInputId"
         v-model="domainValue"
         label="Domain(s)"
         :rules="domainRules"
-        @keydown.enter="addDomain"
+        @keydown.enter.prevent="addDomain"
+        hint="Press Enter to add domain"
+        append-icon="mdi-plus"
+        @click:append="addDomain"
       />
-      <ul v-if="domains.length">
+      <ul v-if="domains.length" class="domain-list">
         <li
           v-for="domain in domains"
           :key="domain"
         >
           <span>{{ domain }}</span>
           <v-tooltip
-            v-if="primaryDomain === domain"
+            v-if="commonName === domain"
             text="This is the primary domain for this certificate. It will be used for the certificate common name."
           >
             <template #activator="{ props }">
               <v-icon
                 v-bind="props"
-                icon="mdi-start-circle-outline"
+                icon="mdi-star"
+                color="amber"
+                class="ml-2"
               />
             </template>
           </v-tooltip>
         </li>
       </ul>
     </fieldset>
+
+    <fieldset class="mb-4">
+      <legend>Certificate Settings</legend>
+      <v-text-field
+        v-model.number="keyLength"
+        type="number"
+        :rules="keyLengthRules"
+        label="Key Length (bits)"
+        hint="Value between 3000 and 6000 bits"
+        class="mb-2"
+      />
+
+      <v-text-field
+        v-model.number="validityDays"
+        type="number"
+        :rules="validityDaysRules"
+        label="Validity Period (days)"
+        hint="Any positive integer value"
+        :disabled="noExpiry"
+      />
+      <div class="d-flex align-center">
+        <v-checkbox
+          v-model="noExpiry"
+          label="Certificate without expiry"
+          class="mr-4"
+        />
+      </div>
+    </fieldset>
+
     <v-btn
       class="w-100 w-md-auto ml-md-auto"
       type="submit"
+      color="primary"
+      :loading="isSubmitting"
     >
       Send certificate request
     </v-btn>
@@ -80,5 +277,30 @@ async function submitNewCertificate() {
 </template>
 
 <style scoped>
+fieldset {
+  border: 1px solid rgba(var(--v-border-color), var(--v-border-opacity));
+  border-radius: 4px;
+  padding: 16px;
+  margin-bottom: 16px;
+}
 
+legend {
+  padding: 0 8px;
+  font-weight: 500;
+}
+
+.domain-list {
+  list-style-type: none;
+  padding-left: 0;
+  margin-top: 8px;
+}
+
+.domain-list li {
+  padding: 8px;
+  margin-bottom: 4px;
+  background-color: rgba(0, 0, 0, 0.05);
+  border-radius: 4px;
+  display: flex;
+  align-items: center;
+}
 </style>
diff --git a/frontend/src/components/CountryListItem.vue b/frontend/src/components/CountryListItem.vue
new file mode 100644
index 0000000..e29bc0f
--- /dev/null
+++ b/frontend/src/components/CountryListItem.vue
@@ -0,0 +1,45 @@
+<script setup lang="ts">
+// Define props with proper TypeScript typing
+import { computed } from "vue";
+
+interface Country {
+  country: string;
+  alpha2: string;
+  alpha3: string;
+  numeric: string;
+}
+
+interface Divider {
+  divider: boolean;
+  header: string;
+}
+
+// Define a type that can be either a Country or a Divider
+type CountryListItemType = Country | Divider;
+
+// Define props with proper TypeScript typing
+const props = defineProps<{
+  item: { raw: CountryListItemType };
+  props?: Record<string, unknown>;
+}>();
+
+// Helper functions to check the type of the item
+const isDivider = computed(() => {
+  return 'divider' in props.item.raw && props.item.raw.divider;
+});
+
+const headerText = computed(() => {
+  return 'header' in props.item.raw ? props.item.raw.header : "";
+});
+
+const countryItem = computed(() => {
+  return !isDivider.value && !headerText.value && 'country' in props.item.raw ? props.item.raw: undefined;
+})
+
+</script>
+
+<template>
+  <v-divider v-if="isDivider" class="my-2" />
+  <v-list-subheader v-if="headerText">{{ headerText }}</v-list-subheader>
+  <v-list-item v-if="countryItem" v-bind="props" :title="countryItem.country" :value="countryItem.alpha2" />
+</template>