diff --git a/README.md b/README.md
index a5d0ec6..6d0e012 100644
--- a/README.md
+++ b/README.md
@@ -256,6 +256,11 @@ SparkyUI includes a **StabilityMatrix-style Model Manager** - a lightweight Fast
   - **HuggingFace** - paste a `resolve` URL (works with gated repos via your token)
 - **Settings** - store your **CivitAI API key** and **HuggingFace token** persistently
   (saved to a SQLite DB under `./sparkyui-data`, never committed to git)
+- **Free GPU memory** - a sidebar button that unloads all models from ComfyUI and releases
+  memory (proxies ComfyUI's `/free`). ComfyUI keeps the last model cached for fast reuse when
+  RAM is plentiful, so memory won't drop on its own after switching models - use this to
+  release it on demand. (For automatic unload after every generation, add
+  `--disable-smart-memory` to `COMFYUI_FLAGS`, at the cost of reloading each run.)
 
 **How it works:**
 - Runs as a FastAPI server in its own container (`python:3.12-slim`)
diff --git a/docker-compose.yml b/docker-compose.yml
index b900d9b..84e934a 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -154,6 +154,8 @@ services:
       # Ports used by the device-routing landing page (/start)
       COMFYUI_PORT: "${COMFYUI_PORT:-8188}"
       COMFYUIMINI_PORT: "${COMFYUIMINI_PORT:-3000}"
+      # Internal URL used to proxy the "Free GPU memory" action
+      COMFYUI_URL: "http://comfyui:8188"
 
     volumes:
       # Shared models dir - read-WRITE here so downloads land on the host.
diff --git a/model-manager/app/config.py b/model-manager/app/config.py
index 5458e12..4ba815b 100644
--- a/model-manager/app/config.py
+++ b/model-manager/app/config.py
@@ -19,6 +19,10 @@ DB_PATH = DATA_DIR / "manager.db"
 COMFYUI_PORT = os.environ.get("COMFYUI_PORT", "8188")
 COMFYUIMINI_PORT = os.environ.get("COMFYUIMINI_PORT", "3000")
 
+# Internal URL of the ComfyUI container (reachable over the docker network),
+# used to proxy the "free memory / unload models" action.
+COMFYUI_URL = os.environ.get("COMFYUI_URL", "http://comfyui:8188")
+
 # Image file types shown in the gallery.
 IMAGE_EXTS = {".png", ".jpg", ".jpeg", ".webp", ".gif", ".bmp"}
 
diff --git a/model-manager/app/main.py b/model-manager/app/main.py
index 7a51e05..b7388c0 100644
--- a/model-manager/app/main.py
+++ b/model-manager/app/main.py
@@ -15,6 +15,7 @@ from pydantic import BaseModel
 from . import db, downloader, registries
 from .config import (
     COMFYUI_PORT,
+    COMFYUI_URL,
     COMFYUIMINI_PORT,
     IMAGE_EXTS,
     KEY_BY_FOLDER,
@@ -314,6 +315,20 @@ def ui_config() -> dict:
     return {"comfyui_port": COMFYUI_PORT, "comfyuimini_port": COMFYUIMINI_PORT}
 
 
+@app.post("/api/comfyui/free")
+async def comfyui_free() -> dict:
+    """Ask ComfyUI to unload all models and free GPU/RAM (proxies POST /free)."""
+    try:
+        async with httpx.AsyncClient(timeout=30) as client:
+            resp = await client.post(
+                f"{COMFYUI_URL}/free",
+                json={"unload_models": True, "free_memory": True})
+            resp.raise_for_status()
+    except Exception as exc:  # noqa: BLE001 - report to UI
+        raise HTTPException(502, f"Could not reach ComfyUI: {exc}")
+    return {"ok": True}
+
+
 @app.get("/start")
 def start() -> FileResponse:
     return FileResponse(STATIC_DIR / "start.html")
diff --git a/model-manager/app/static/app.js b/model-manager/app/static/app.js
index eb209ed..32291e8 100644
--- a/model-manager/app/static/app.js
+++ b/model-manager/app/static/app.js
@@ -663,6 +663,24 @@ $("#saveSettings").addEventListener("click", async () => {
   }
 });
 
+// ---- free GPU memory ------------------------------------------------------
+
+$("#freeMemBtn").addEventListener("click", async () => {
+  const btn = $("#freeMemBtn");
+  const msg = $("#freeMemMsg");
+  btn.disabled = true;
+  msg.className = "form-msg"; msg.textContent = "Unloading…";
+  try {
+    await api("/api/comfyui/free", { method: "POST" });
+    msg.className = "form-msg ok"; msg.textContent = "Models unloaded.";
+  } catch (err) {
+    msg.className = "form-msg err"; msg.textContent = err.message;
+  } finally {
+    btn.disabled = false;
+    setTimeout(() => { msg.textContent = ""; }, 4000);
+  }
+});
+
 // ---- boot -----------------------------------------------------------------
 
 (async function init() {
diff --git a/model-manager/app/static/index.html b/model-manager/app/static/index.html
index 23a5413..3acea13 100644
--- a/model-manager/app/static/index.html
+++ b/model-manager/app/static/index.html
@@ -33,7 +33,12 @@
           <span class="nav-ico">⚙</span> Settings
         </button>
       </nav>
-      <div class="sidebar-foot" id="modelsDir"></div>
+      <div class="sidebar-foot">
+        <button class="btn" id="freeMemBtn" title="Unload all models from ComfyUI and free GPU/RAM">
+          ⏏ Free GPU memory
+        </button>
+        <span class="form-msg" id="freeMemMsg"></span>
+      </div>
     </aside>
 
     <main class="content">
diff --git a/model-manager/app/static/style.css b/model-manager/app/static/style.css
index c3882e6..f624945 100644
--- a/model-manager/app/static/style.css
+++ b/model-manager/app/static/style.css
@@ -58,7 +58,10 @@ nav { display: flex; flex-direction: column; gap: 4px; }
 .sidebar-foot {
   margin-top: auto; color: var(--text-dim); font-size: 11px;
   word-break: break-all; padding: 8px 6px 0;
+  display: flex; flex-direction: column; gap: 6px;
 }
+.sidebar-foot .btn { width: 100%; font-size: 13px; }
+.sidebar-foot .form-msg { font-size: 11px; text-align: center; }
 
 /* ---- content ---- */
 .content { flex: 1; overflow-y: auto; padding: 26px 32px; }