diff --git a/lib/pleroma/web/media_proxy.ex b/lib/pleroma/web/media_proxy.ex
index 27f337138..d0d4bb4b3 100644
--- a/lib/pleroma/web/media_proxy.ex
+++ b/lib/pleroma/web/media_proxy.ex
@@ -121,6 +121,11 @@ defmodule Pleroma.Web.MediaProxy do
     end
   end
 
+  def decode_url(encoded) do
+    [_, "proxy", sig, base64 | _] = URI.parse(encoded).path |> String.split("/")
+    decode_url(sig, base64)
+  end
+
   defp signed_url(url) do
     :crypto.hmac(:sha, Config.get([Web.Endpoint, :secret_key_base]), url)
   end