diff --git a/scripts/pi-hole/js/groups-adlists.js b/scripts/pi-hole/js/groups-adlists.js
index 84ff709c..d5363c01 100644
--- a/scripts/pi-hole/js/groups-adlists.js
+++ b/scripts/pi-hole/js/groups-adlists.js
@@ -499,13 +499,21 @@ function delItems(ids) {
 
 function addAdlist(event) {
   const type = event.data.type;
-  const address = utils.escapeHtml($("#new_address").val());
   const comment = utils.escapeHtml($("#new_comment").val());
 
-  utils.disableAll();
-  utils.showAlert("info", "", "Adding subscribed " + type + "list...", address);
+  // Check if the user wants to add multiple domains (space or newline separated)
+  // If so, split the input and store it in an array
+  var addresses = utils.escapeHtml($("#new_address").val()).split(/[\s,]+/);
+  // Remove empty elements
+  addresses = addresses.filter(function (el) {
+    return el !== "";
+  });
+  const addressestr = JSON.stringify(addresses);
 
-  if (address.length === 0) {
+  utils.disableAll();
+  utils.showAlert("info", "", "Adding subscribed " + type + "list(s)...", addressestr);
+
+  if (addresses.length === 0) {
     // enable the ui elements again
     utils.enableAll();
     utils.showAlert("warning", "", "Warning", "Please specify " + type + "list address");
@@ -516,10 +524,15 @@ function addAdlist(event) {
     url: "/api/lists",
     method: "post",
     dataType: "json",
-    data: JSON.stringify({ address: address, comment: comment, type: type }),
+    data: JSON.stringify({ address: addresses, comment: comment, type: type }),
     success: function () {
       utils.enableAll();
-      utils.showAlert("success", "fas fa-plus", "Successfully added " + type + "list", address);
+      utils.showAlert(
+        "success",
+        "fas fa-plus",
+        "Successfully added " + type + "list(s)",
+        addressestr
+      );
       table.ajax.reload(null, false);
       table.rows().deselect();
 
diff --git a/scripts/pi-hole/js/groups-clients.js b/scripts/pi-hole/js/groups-clients.js
index 843be7b9..013bab8b 100644
--- a/scripts/pi-hole/js/groups-clients.js
+++ b/scripts/pi-hole/js/groups-clients.js
@@ -405,34 +405,47 @@ function delItems(ids) {
 }
 
 function addClient() {
-  var ip = utils.escapeHtml($("#select").val().trim());
   const comment = utils.escapeHtml($("#new_comment").val());
 
-  utils.disableAll();
-  utils.showAlert("info", "", "Adding client...", ip);
-
-  if (ip.length === 0) {
-    utils.enableAll();
-    utils.showAlert("warning", "", "Warning", "Please specify a client IP or MAC address");
-    return;
-  }
+  // Check if the user wants to add multiple IPs (space or newline separated)
+  // If so, split the input and store it in an array
+  var ips = utils.escapeHtml($("#select").val().trim()).split(/[\s,]+/);
+  // Remove empty elements
+  ips = ips.filter(function (el) {
+    return el !== "";
+  });
+  const ipStr = JSON.stringify(ips);
 
   // Validate input, can be:
   // - IPv4 address (with and without CIDR)
   // - IPv6 address (with and without CIDR)
   // - MAC address (in the form AA:BB:CC:DD:EE:FF)
   // - host name (arbitrary form, we're only checking against some reserved characters)
-  if (utils.validateIPv4CIDR(ip) || utils.validateIPv6CIDR(ip) || utils.validateMAC(ip)) {
-    // Convert input to upper case (important for MAC addresses)
-    ip = ip.toUpperCase();
-  } else if (!utils.validateHostname(ip)) {
+  for (var i = 0; i < ips.length; i++) {
+    if (
+      utils.validateIPv4CIDR(ips[i]) ||
+      utils.validateIPv6CIDR(ips[i]) ||
+      utils.validateMAC(ips[i])
+    ) {
+      // Convert input to upper case (important for MAC addresses)
+      ips[i] = ips[i].toUpperCase();
+    } else if (!utils.validateHostname(ips[i])) {
+      utils.showAlert(
+        "warning",
+        "",
+        "Warning",
+        "Input is neither a valid IP or MAC address nor a valid host name!"
+      );
+      return;
+    }
+  }
+
+  utils.disableAll();
+  utils.showAlert("info", "", "Adding client(s)...", ipStr);
+
+  if (ips.length === 0) {
     utils.enableAll();
-    utils.showAlert(
-      "warning",
-      "",
-      "Warning",
-      "Input is neither a valid IP or MAC address nor a valid host name!"
-    );
+    utils.showAlert("warning", "", "Warning", "Please specify a client IP or MAC address");
     return;
   }
 
@@ -440,10 +453,10 @@ function addClient() {
     url: "/api/clients",
     method: "post",
     dataType: "json",
-    data: JSON.stringify({ client: ip, comment: comment }),
+    data: JSON.stringify({ client: ips, comment: comment }),
     success: function () {
       utils.enableAll();
-      utils.showAlert("success", "fas fa-plus", "Successfully added client", ip);
+      utils.showAlert("success", "fas fa-plus", "Successfully added client(s)", ipStr);
       reloadClientSuggestions();
       table.ajax.reload(null, false);
       table.rows().deselect();
diff --git a/scripts/pi-hole/js/groups-domains.js b/scripts/pi-hole/js/groups-domains.js
index 1429a95a..a4591253 100644
--- a/scripts/pi-hole/js/groups-domains.js
+++ b/scripts/pi-hole/js/groups-domains.js
@@ -497,45 +497,53 @@ function addDomain() {
     commentEl = $("#new_regex_comment");
   }
 
-  var domain = utils.escapeHtml(domainEl.val());
   const comment = utils.escapeHtml(commentEl.val());
 
-  utils.disableAll();
-  utils.showAlert("info", "", "Adding domain...", domain);
+  // Check if the user wants to add multiple domains (space or newline separated)
+  // If so, split the input and store it in an array
+  var domains = utils.escapeHtml(domainEl.val()).split(/[\s,]+/);
+  // Remove empty elements
+  domains = domains.filter(function (el) {
+    return el !== "";
+  });
+  const domainStr = JSON.stringify(domains);
 
-  if (domain.length < 2) {
+  utils.disableAll();
+  utils.showAlert("info", "", "Adding domain(s)...", domainStr);
+
+  if (domains.length === 0) {
     utils.enableAll();
-    utils.showAlert("warning", "", "Warning", "Please specify a domain");
+    utils.showAlert("warning", "", "Warning", "Please specify at least one domain");
     return;
   }
 
-  // strip "*." if specified by user in wildcard mode
-  if (kind === "exact" && wildcardChecked && domain.startsWith("*.")) {
-    domain = domain.substr(2);
+  for (var i = 0; i < domains.length; i++) {
+    if (kind === "exact" && wildcardChecked) {
+      // Transform domain to wildcard if specified by user
+      domains[i] = "(\\.|^)" + domains[i].replaceAll(".", "\\.") + "$";
+      kind = "regex";
+
+      // strip leading "*." if specified by user in wildcard mode
+      if (domains[i].startsWith("*.")) domains[i] = domains[i].substr(2);
+    }
   }
 
   // determine list type
   const type = action === "add_deny" ? "deny" : "allow";
 
-  // Transform domain to wildcard if specified by user
-  if (kind === "exact" && wildcardChecked) {
-    domain = "(\\.|^)" + domain.replaceAll(".", "\\.") + "$";
-    kind = "regex";
-  }
-
   $.ajax({
     url: "/api/domains/" + type + "/" + kind,
     method: "post",
     dataType: "json",
     data: JSON.stringify({
-      domain: domain,
+      domain: domains,
       comment: comment,
       type: type,
       kind: kind,
     }),
     success: function () {
       utils.enableAll();
-      utils.showAlert("success", "fas fa-plus", "Successfully added domain", domain);
+      utils.showAlert("success", "fas fa-plus", "Successfully added domain(s)", domainStr);
       table.ajax.reload(null, false);
       table.rows().deselect();
 
diff --git a/scripts/pi-hole/js/groups.js b/scripts/pi-hole/js/groups.js
index 0beab5ba..eb14b0eb 100644
--- a/scripts/pi-hole/js/groups.js
+++ b/scripts/pi-hole/js/groups.js
@@ -277,13 +277,24 @@ function delItems(ids) {
 }
 
 function addGroup() {
-  const name = utils.escapeHtml($("#new_name").val());
   const comment = utils.escapeHtml($("#new_comment").val());
 
-  utils.disableAll();
-  utils.showAlert("info", "", "Adding group...", name);
+  // Check if the user wants to add multiple groups (space or newline separated)
+  // If so, split the input and store it in an array
+  var names = utils
+    .escapeHtml($("#new_name"))
+    .val()
+    .split(/[\s,]+/);
+  // Remove empty elements
+  names = names.filter(function (el) {
+    return el !== "";
+  });
+  const groupStr = JSON.stringify(names);
 
-  if (name.length === 0) {
+  utils.disableAll();
+  utils.showAlert("info", "", "Adding group(s)...", groupStr);
+
+  if (names.length === 0) {
     // enable the ui elements again
     utils.enableAll();
     utils.showAlert("warning", "", "Warning", "Please specify a group name");
@@ -295,13 +306,13 @@ function addGroup() {
     method: "post",
     dataType: "json",
     data: JSON.stringify({
-      name: name,
+      name: names,
       comment: comment,
       enabled: true,
     }),
     success: function () {
       utils.enableAll();
-      utils.showAlert("success", "fas fa-plus", "Successfully added group", name);
+      utils.showAlert("success", "fas fa-plus", "Successfully added group(s)", groupStr);
       $("#new_name").val("");
       $("#new_comment").val("");
       table.ajax.reload();