diff --git a/Formula/libidn2.rb b/Formula/libidn2.rb
new file mode 100644
index 000000000000..7a3054cd1c47
--- /dev/null
+++ b/Formula/libidn2.rb
@@ -0,0 +1,31 @@
+class Libidn2 < Formula
+  desc "International domain name library (IDNA2008, Punycode and TR46)"
+  homepage "https://www.gnu.org/software/libidn/#libidn2"
+  url "https://ftp.gnu.org/gnu/libidn/libidn2-2.0.3.tar.lz"
+  mirror "https://ftpmirror.gnu.org/libidn/libidn2-2.0.3.tar.lz"
+  sha256 "b52fd3bc9693de16db93aa23a11a56f3cdb3fbf005a360145401ab5d252490f5"
+
+  head do
+    url "https://gitlab.com/libidn/libidn2.git"
+    depends_on "automake" => :build
+    depends_on "autoconf" => :build
+    depends_on "libtool" => :build
+    depends_on "gettext" => :build
+    depends_on "gengetopt" => :build
+  end
+
+  depends_on "pkg-config" => :build
+  depends_on "libunistring"
+
+  def install
+    system "./configure", "--disable-dependency-tracking",
+                          "--prefix=#{prefix}",
+                          "--disable-doc"
+    system "make", "install"
+  end
+
+  test do
+    ENV["CHARSET"] = "UTF-8"
+    system bin/"idn2", "räksmörgås.se", "blåbærgrød.no"
+  end
+end