diff --git a/config/config.exs b/config/config.exs
index 1b11b4fa9..7385fb6c3 100644
--- a/config/config.exs
+++ b/config/config.exs
@@ -71,7 +71,8 @@ config :pleroma, Pleroma.Upload,
       follow_redirect: true,
       pool: :upload
     ]
-  ]
+  ],
+  filename_display_max_length: 30
 
 config :pleroma, Pleroma.Uploaders.Local, uploads: "uploads"
 
diff --git a/lib/pleroma/web/common_api/utils.ex b/lib/pleroma/web/common_api/utils.ex
index b9fa21648..7be9d8caa 100644
--- a/lib/pleroma/web/common_api/utils.ex
+++ b/lib/pleroma/web/common_api/utils.ex
@@ -396,10 +396,12 @@ defmodule Pleroma.Web.CommonAPI.Utils do
   def to_masto_date(_), do: ""
 
   defp shortname(name) do
-    if String.length(name) < 30 do
-      name
+    with max_length when max_length > 0 <-
+           Pleroma.Config.get([Pleroma.Upload, :filename_display_max_length], 30),
+         true <- String.length(name) > max_length do
+      String.slice(name, 0..max_length) <> "…"
     else
-      String.slice(name, 0..30) <> "…"
+      _ -> name
     end
   end
 
diff --git a/test/web/common_api/common_api_utils_test.exs b/test/web/common_api/common_api_utils_test.exs
index d7d2d10d5..e67c10b93 100644
--- a/test/web/common_api/common_api_utils_test.exs
+++ b/test/web/common_api/common_api_utils_test.exs
@@ -14,18 +14,41 @@ defmodule Pleroma.Web.CommonAPI.UtilsTest do
 
   @public_address "https://www.w3.org/ns/activitystreams#Public"
 
-  test "it adds attachment links to a given text and attachment set" do
-    name =
-      "Sakura%20Mana%20%E2%80%93%20Turned%20on%20by%20a%20Senior%20OL%20with%20a%20Temptating%20Tight%20Skirt-s%20Full%20Hipline%20and%20Panty%20Shot-%20Beautiful%20Thick%20Thighs-%20and%20Erotic%20Ass-%20-2015-%20--%20Oppaitime%208-28-2017%206-50-33%20PM.png"
+  describe "add_attachments/2" do
+    setup do
+      name =
+        "Sakura Mana – Turned on by a Senior OL with a Temptating Tight Skirt-s Full Hipline and Panty Shot- Beautiful Thick Thighs- and Erotic Ass- -2015- -- Oppaitime 8-28-2017 6-50-33 PM.png"
 
-    attachment = %{
-      "url" => [%{"href" => name}]
-    }
+      attachment = %{
+        "url" => [%{"href" => URI.encode(name)}]
+      }
 
-    res = Utils.add_attachments("", [attachment])
+      %{name: name, attachment: attachment}
+    end
 
-    assert res ==
-             "<br><a href=\"#{name}\" class='attachment'>Sakura Mana – Turned on by a Se…</a>"
+    test "it adds attachment links to a given text and attachment set", %{
+      name: name,
+      attachment: attachment
+    } do
+      len = 10
+      clear_config([Pleroma.Upload, :filename_display_max_length], len)
+
+      expected =
+        "<br><a href=\"#{URI.encode(name)}\" class='attachment'>#{String.slice(name, 0..len)}…</a>"
+
+      assert Utils.add_attachments("", [attachment]) == expected
+    end
+
+    test "doesn't truncate file name if config for truncate is set to 0", %{
+      name: name,
+      attachment: attachment
+    } do
+      clear_config([Pleroma.Upload, :filename_display_max_length], 0)
+
+      expected = "<br><a href=\"#{URI.encode(name)}\" class='attachment'>#{name}</a>"
+
+      assert Utils.add_attachments("", [attachment]) == expected
+    end
   end
 
   describe "it confirms the password given is the current users password" do