diff --git a/README.md b/README.md
index f5c87a6..f350ab2 100644
--- a/README.md
+++ b/README.md
@@ -26,7 +26,7 @@ Usage:
 Flags:
   -w, --wordlist string    Path to wordlist
   -r, --resolvers string   Path to resolvers
-  -o, --output string      Path to save output
+  -o, --output string      Path to save output (csv, txt, json)
   -u, --udp                Query using UDP
   -i, --ipv6               Query for IPv6
   -d, --wildcard           Query for wildcard
diff --git a/v1/cmd/blink/main.go b/v1/cmd/blink/main.go
index b452eed..d2385b8 100644
--- a/v1/cmd/blink/main.go
+++ b/v1/cmd/blink/main.go
@@ -200,7 +200,8 @@ func init() {
 	// Add flags
 	rootCmd.Flags().StringVarP(&wordlist, "wordlist", "w", "", "Path to wordlist")
 	rootCmd.Flags().StringVarP(&resolvers, "resolvers", "r", "", "Path to resolvers")
-	rootCmd.Flags().StringVarP(&output, "output", "o", "", "Path to save output")
+	rootCmd.Flags().
+		StringVarP(&output, "output", "o", "", fmt.Sprintf("Path to save output (%s)", strings.Join(file.Extensions, ", ")))
 	rootCmd.Flags().BoolVarP(&opts.UDP, "udp", "u", false, "Query using UDP")
 	rootCmd.Flags().BoolVarP(&opts.IPv6, "ipv6", "i", false, "Query for IPv6")
 	rootCmd.Flags().BoolVarP(&wildcard, "wildcard", "d", false, "Query for wildcard")
diff --git a/v1/internal/file/write.go b/v1/internal/file/write.go
index 0ee736f..98369fc 100644
--- a/v1/internal/file/write.go
+++ b/v1/internal/file/write.go
@@ -8,7 +8,7 @@ import (
 )
 
 // Supported extensions
-var extensions = [2]string{"txt", "json"}
+var Extensions = []string{"csv", "txt", "json"}
 
 // Write to file
 func Write(path, domain, subdomain string, ips []string) error {
@@ -34,6 +34,19 @@ func Write(path, domain, subdomain string, ips []string) error {
 
 	// Check extension
 	switch extension {
+	case "csv":
+		// Store IPs
+		ip := strings.Join(ips, "#")
+
+		// Format line
+		line := fmt.Sprintf("%s,%s,%s\n", domain, subdomain, ip)
+
+		// Write line
+		_, err := file.Write([]byte(line))
+		if err != nil {
+			return err
+		}
+
 	case "txt":
 		// Store IPs
 		ip := strings.Join(ips, ",")