diff --git a/Cargo.lock b/Cargo.lock
index f7892fb..f7b6012 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -110,9 +110,9 @@ dependencies = [
 
 [[package]]
 name = "anyhow"
-version = "1.0.82"
+version = "1.0.86"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f538837af36e6f6a9be0faa67f9a314f8119e4e4b5867c6ab40ed60360142519"
+checksum = "b3d1d046238990b9cf5bcde22a3fb3584ee5cf65fb2765f454ed428c7a0063da"
 
 [[package]]
 name = "arboard"
@@ -524,9 +524,9 @@ checksum = "1fd0f2584146f6f2ef48085050886acf353beff7305ebd1ae69500e27c67f64b"
 
 [[package]]
 name = "bytes"
-version = "1.6.0"
+version = "1.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "514de17de45fdb8dc022b1a7975556c53c86f9f0aa5f534b98977b171857c2c9"
+checksum = "a12916984aab3fa6e39d655a33e09c0071eb36d6ab3aea5c2d78551f1df6d952"
 
 [[package]]
 name = "calloop"
@@ -2274,9 +2274,9 @@ checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
 
 [[package]]
 name = "libc"
-version = "0.2.154"
+version = "0.2.155"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ae743338b92ff9146ce83992f766a31066a91a8c84a45e0e9f21e7cf6de6d346"
+checksum = "97b3888a4aecf77e811145cadf6eef5901f4782c53886191b2f693f24761847c"
 
 [[package]]
 name = "libloading"
@@ -2295,7 +2295,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0c2a198fb6b0eada2a8df47933734e6d35d350665a33a3593d7164fa52c75c19"
 dependencies = [
  "cfg-if",
- "windows-targets 0.52.5",
+ "windows-targets 0.48.5",
 ]
 
 [[package]]
@@ -2863,6 +2863,7 @@ dependencies = [
  "pollster",
  "reqwest",
  "rfd",
+ "rlwinmdec",
  "ron",
  "self_update",
  "serde",
@@ -2905,9 +2906,9 @@ checksum = "3fdb12b2476b595f9358c5161aa467c2438859caa136dec86c26fdd2efe17b92"
 
 [[package]]
 name = "openssl"
-version = "0.10.64"
+version = "0.10.66"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "95a0481286a310808298130d22dd1fef0fa571e05a8f44ec801801e84b216b1f"
+checksum = "9529f4786b70a3e8c61e11179af17ab6188ad8d0ded78c5529441ed39d4bd9c1"
 dependencies = [
  "bitflags 2.5.0",
  "cfg-if",
@@ -2937,9 +2938,9 @@ checksum = "ff011a302c396a5197692431fc1948019154afc178baf7d8e37367442a4601cf"
 
 [[package]]
 name = "openssl-sys"
-version = "0.9.102"
+version = "0.9.103"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c597637d56fbc83893a35eb0dd04b2b8e7a50c91e64e9493e398b5df4fb45fa2"
+checksum = "7f9e8deee91df40a943c71b917e5874b951d32a802526c85721ce3b776c929d6"
 dependencies = [
  "cc",
  "libc",
@@ -3509,6 +3510,15 @@ dependencies = [
  "windows-sys 0.52.0",
 ]
 
+[[package]]
+name = "rlwinmdec"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2076dbc187938f3db71c03c85d143febf01026631189dc8ca85f8c886d90ea12"
+dependencies = [
+ "anyhow",
+]
+
 [[package]]
 name = "ron"
 version = "0.8.1"
@@ -4743,9 +4753,9 @@ dependencies = [
 
 [[package]]
 name = "wgpu-hal"
-version = "0.19.4"
+version = "0.19.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fc1a4924366df7ab41a5d8546d6534f1f33231aa5b3f72b9930e300f254e39c3"
+checksum = "bfabcfc55fd86611a855816326b2d54c3b2fd7972c27ce414291562650552703"
 dependencies = [
  "android_system_properties",
  "arrayvec",
diff --git a/objdiff-gui/Cargo.toml b/objdiff-gui/Cargo.toml
index fb7f9c5..955b7a7 100644
--- a/objdiff-gui/Cargo.toml
+++ b/objdiff-gui/Cargo.toml
@@ -29,6 +29,7 @@ bytes = "1.6.0"
 cfg-if = "1.0.0"
 const_format = "0.2.32"
 cwdemangle = "1.0.0"
+rlwinmdec = "1.0.1"
 dirs = "5.0.1"
 egui = "0.27.2"
 egui_extras = "0.27.2"
diff --git a/objdiff-gui/src/app.rs b/objdiff-gui/src/app.rs
index 6a4ac98..0e74073 100644
--- a/objdiff-gui/src/app.rs
+++ b/objdiff-gui/src/app.rs
@@ -39,6 +39,7 @@ use crate::{
         function_diff::function_diff_ui,
         graphics::{graphics_window, GraphicsConfig, GraphicsViewState},
         jobs::jobs_ui,
+        rlwinm::{rlwinm_decode_window, RlwinmDecodeViewState},
         symbol_diff::{symbol_diff_ui, DiffViewState, View},
     },
 };
@@ -48,11 +49,13 @@ pub struct ViewState {
     pub jobs: JobQueue,
     pub config_state: ConfigViewState,
     pub demangle_state: DemangleViewState,
+    pub rlwinm_decode_state: RlwinmDecodeViewState,
     pub diff_state: DiffViewState,
     pub graphics_state: GraphicsViewState,
     pub frame_history: FrameHistory,
     pub show_appearance_config: bool,
     pub show_demangle: bool,
+    pub show_rlwinm_decode: bool,
     pub show_project_config: bool,
     pub show_arch_config: bool,
     pub show_debug: bool,
@@ -450,11 +453,13 @@ impl eframe::App for App {
             jobs,
             config_state,
             demangle_state,
+            rlwinm_decode_state,
             diff_state,
             graphics_state,
             frame_history,
             show_appearance_config,
             show_demangle,
+            show_rlwinm_decode,
             show_project_config,
             show_arch_config,
             show_debug,
@@ -513,6 +518,10 @@ impl eframe::App for App {
                         *show_demangle = !*show_demangle;
                         ui.close_menu();
                     }
+                    if ui.button("Rlwinm Decoder…").clicked() {
+                        *show_rlwinm_decode = !*show_rlwinm_decode;
+                        ui.close_menu();
+                    }
                 });
                 ui.menu_button("Diff Options", |ui| {
                     if ui.button("Arch Settings…").clicked() {
@@ -598,6 +607,7 @@ impl eframe::App for App {
         project_window(ctx, config, show_project_config, config_state, appearance);
         appearance_window(ctx, show_appearance_config, appearance);
         demangle_window(ctx, show_demangle, demangle_state, appearance);
+        rlwinm_decode_window(ctx, show_rlwinm_decode, rlwinm_decode_state, appearance);
         arch_config_window(ctx, config, show_arch_config, appearance);
         debug_window(ctx, show_debug, frame_history, appearance);
         graphics_window(ctx, show_graphics, frame_history, graphics_state, appearance);
diff --git a/objdiff-gui/src/views/mod.rs b/objdiff-gui/src/views/mod.rs
index 799b41b..c24a30f 100644
--- a/objdiff-gui/src/views/mod.rs
+++ b/objdiff-gui/src/views/mod.rs
@@ -10,6 +10,7 @@ pub(crate) mod frame_history;
 pub(crate) mod function_diff;
 pub(crate) mod graphics;
 pub(crate) mod jobs;
+pub(crate) mod rlwinm;
 pub(crate) mod symbol_diff;
 
 #[inline]
diff --git a/objdiff-gui/src/views/rlwinm.rs b/objdiff-gui/src/views/rlwinm.rs
new file mode 100644
index 0000000..08b9354
--- /dev/null
+++ b/objdiff-gui/src/views/rlwinm.rs
@@ -0,0 +1,34 @@
+use egui::TextStyle;
+
+use crate::views::appearance::Appearance;
+
+#[derive(Default)]
+pub struct RlwinmDecodeViewState {
+    pub text: String,
+}
+
+pub fn rlwinm_decode_window(
+    ctx: &egui::Context,
+    show: &mut bool,
+    state: &mut RlwinmDecodeViewState,
+    appearance: &Appearance,
+) {
+    egui::Window::new("Rlwinm Decoder").open(show).show(ctx, |ui| {
+        ui.text_edit_singleline(&mut state.text);
+        ui.add_space(10.0);
+        if let Some(demangled) = rlwinmdec::decode(&state.text) {
+            ui.scope(|ui| {
+                ui.style_mut().override_text_style = Some(TextStyle::Monospace);
+                ui.colored_label(appearance.replace_color, &demangled);
+            });
+            if ui.button("Copy").clicked() {
+                ui.output_mut(|output| output.copied_text = demangled);
+            }
+        } else {
+            ui.scope(|ui| {
+                ui.style_mut().override_text_style = Some(TextStyle::Monospace);
+                ui.colored_label(appearance.replace_color, "[invalid]");
+            });
+        }
+    });
+}