diff --git a/internal/runner/runner.go b/internal/runner/runner.go
index 91e80136..114ebc77 100644
--- a/internal/runner/runner.go
+++ b/internal/runner/runner.go
@@ -440,7 +440,7 @@ func (r *Runner) normalizeAndQueueInputs(inputs chan taskInput) error {
 		for scanner.Scan() {
 			text := scanner.Text()
 			if text != "" {
-				r.processInputItem(text, inputs)
+				r.processCommaSeparatedInput(text, inputs)
 			}
 		}
 	}
@@ -449,13 +449,23 @@ func (r *Runner) normalizeAndQueueInputs(inputs chan taskInput) error {
 		for scanner.Scan() {
 			text := scanner.Text()
 			if text != "" {
-				r.processInputItem(text, inputs)
+				r.processCommaSeparatedInput(text, inputs)
 			}
 		}
 	}
 	return nil
 }
 
+func (r *Runner) processCommaSeparatedInput(text string, inputs chan taskInput) {
+	for _, part := range strings.Split(text, ",") {
+		trimmed := strings.TrimSpace(part)
+		if trimmed == "" {
+			continue
+		}
+		r.processInputItem(trimmed, inputs)
+	}
+}
+
 // resolveFQDN resolves a FQDN and returns the IP addresses
 func (r *Runner) resolveFQDN(target string) ([]string, error) {
 	// If the host is a Domain, then perform resolution and discover all IP
diff --git a/internal/runner/runner_test.go b/internal/runner/runner_test.go
index b4ed856e..0a6bab36 100644
--- a/internal/runner/runner_test.go
+++ b/internal/runner/runner_test.go
@@ -429,3 +429,25 @@ func Test_CTLogsModeOutputOptions(t *testing.T) {
 		})
 	}
 }
+
+func Test_ProcessCommaSeparatedInput(t *testing.T) {
+	options := &clients.Options{Ports: []string{"443"}}
+	runner := &Runner{options: options}
+
+	inputs := make(chan taskInput)
+	go func() {
+		runner.processCommaSeparatedInput("example.com, one.one.one.one ,", inputs)
+		close(inputs)
+	}()
+
+	var got []taskInput
+	for task := range inputs {
+		got = append(got, task)
+	}
+
+	expected := []taskInput{
+		{host: "example.com", port: "443"},
+		{host: "one.one.one.one", port: "443"},
+	}
+	require.ElementsMatch(t, expected, got)
+}