diff --git a/frontend/app.js b/frontend/app.js
index eb526d6..4f32b18 100644
--- a/frontend/app.js
+++ b/frontend/app.js
@@ -63,6 +63,9 @@ const el = {
   lockedInput: document.getElementById("lockedInput"),
   rotateSelectedBtn: document.getElementById("rotateSelectedBtn"),
   updatePlacementBtn: document.getElementById("updatePlacementBtn"),
+  duplicateComponentBtn: document.getElementById("duplicateComponentBtn"),
+  deleteComponentBtn: document.getElementById("deleteComponentBtn"),
+  isolateSelectedComponentBtn: document.getElementById("isolateSelectedComponentBtn"),
   symbolMeta: document.getElementById("symbolMeta"),
   symbolCategoryInput: document.getElementById("symbolCategoryInput"),
   symbolWidthInput: document.getElementById("symbolWidthInput"),
@@ -87,6 +90,7 @@ const el = {
   netNameInput: document.getElementById("netNameInput"),
   netClassInput: document.getElementById("netClassInput"),
   updateNetBtn: document.getElementById("updateNetBtn"),
+  isolateSelectedNetBtn: document.getElementById("isolateSelectedNetBtn"),
   netNodeRefInput: document.getElementById("netNodeRefInput"),
   netNodePinInput: document.getElementById("netNodePinInput"),
   addNetNodeBtn: document.getElementById("addNetNodeBtn"),
@@ -261,6 +265,19 @@ function normalizeNetName(raw) {
     .replace(/\s+/g, "_");
 }
 
+function nextRefLike(baseRef) {
+  const base = normalizeRef(baseRef || "X1");
+  const m = /^([A-Za-z_]+)(\d+)?$/i.exec(base);
+  const prefix = m?.[1] ?? `${base}_`;
+  let n = Number(m?.[2] ?? 1);
+  let candidate = `${prefix}${n}`;
+  while (instanceByRef(candidate)) {
+    n += 1;
+    candidate = `${prefix}${n}`;
+  }
+  return candidate;
+}
+
 function escHtml(text) {
   return String(text ?? "")
     .replaceAll("&", "&")
@@ -890,6 +907,11 @@ function renderNetEditor() {
 }
 
 function renderSelected() {
+  el.duplicateComponentBtn.disabled = true;
+  el.deleteComponentBtn.disabled = true;
+  el.isolateSelectedComponentBtn.disabled = true;
+  el.isolateSelectedNetBtn.disabled = true;
+
   if (!state.model) {
     el.selectedSummary.textContent = "Click a component, net, or pin to inspect it.";
     el.componentEditor.classList.add("hidden");
@@ -931,6 +953,9 @@ function renderSelected() {
     el.instRefInput.value = inst.ref;
     el.instValueInput.value = String(inst.properties?.value ?? "");
     el.instNotesInput.value = String(inst.properties?.notes ?? "");
+    el.duplicateComponentBtn.disabled = false;
+    el.deleteComponentBtn.disabled = false;
+    el.isolateSelectedComponentBtn.disabled = false;
     renderSymbolEditorForRef(inst.ref);
     el.pinEditor.classList.add("hidden");
     el.netEditor.classList.add("hidden");
@@ -941,6 +966,7 @@ function renderSelected() {
     const net = state.model.nets.find((n) => n.name === state.selectedNet);
     if (net) {
       el.selectedSummary.textContent = `${net.name} (${net.class})\nNodes: ${net.nodes.map((n) => `${n.ref}.${n.pin}`).join(", ")}`;
+      el.isolateSelectedNetBtn.disabled = false;
       el.componentEditor.classList.add("hidden");
       el.symbolEditor.classList.add("hidden");
       el.pinEditor.classList.add("hidden");
@@ -1915,6 +1941,63 @@ function setupEvents() {
     queueCompile(true, "rotate");
   });
 
+  el.duplicateComponentBtn.addEventListener("click", () => {
+    if (state.selectedRefs.length !== 1 || !state.selectedRef || !state.model) {
+      return;
+    }
+    const inst = instanceByRef(state.selectedRef);
+    if (!inst) {
+      return;
+    }
+    pushHistory("duplicate-component");
+    const nextRef = nextRefLike(inst.ref);
+    const next = clone(inst);
+    next.ref = nextRef;
+    next.placement = {
+      ...next.placement,
+      x: toGrid(Number(next.placement.x ?? 0) + GRID * 2),
+      y: toGrid(Number(next.placement.y ?? 0) + GRID * 2),
+      locked: false
+    };
+    state.model.instances.push(next);
+    selectSingleRef(nextRef);
+    state.selectedNet = null;
+    state.selectedPin = null;
+    state.isolateNet = false;
+    el.jsonFeedback.textContent = `Duplicated ${inst.ref} as ${nextRef}.`;
+    queueCompile(true, "duplicate-component");
+  });
+
+  el.deleteComponentBtn.addEventListener("click", () => {
+    if (state.selectedRefs.length !== 1 || !state.selectedRef || !state.model) {
+      return;
+    }
+    const ref = state.selectedRef;
+    pushHistory("delete-component");
+    state.model.instances = state.model.instances.filter((i) => i.ref !== ref);
+    for (const net of state.model.nets ?? []) {
+      net.nodes = (net.nodes ?? []).filter((n) => n.ref !== ref);
+    }
+    state.model.nets = (state.model.nets ?? []).filter((n) => (n.nodes ?? []).length >= 2);
+    setSelectedRefs([]);
+    state.selectedNet = null;
+    state.selectedPin = null;
+    state.isolateComponent = false;
+    state.isolateNet = false;
+    el.jsonFeedback.textContent = `Deleted component ${ref}.`;
+    queueCompile(true, "delete-component");
+  });
+
+  el.isolateSelectedComponentBtn.addEventListener("click", () => {
+    if (!state.selectedRef) {
+      return;
+    }
+    state.isolateComponent = true;
+    state.isolateNet = false;
+    state.selectedNet = null;
+    renderAll();
+  });
+
   el.showPinNetLabelInput.addEventListener("change", () => {
     if (!state.selectedPin) {
       return;
@@ -2054,6 +2137,17 @@ function setupEvents() {
     queueCompile(true, "net-edit");
   });
 
+  el.isolateSelectedNetBtn.addEventListener("click", () => {
+    if (!state.selectedNet) {
+      return;
+    }
+    state.isolateNet = true;
+    state.isolateComponent = false;
+    setSelectedRefs([]);
+    state.selectedPin = null;
+    renderAll();
+  });
+
   el.addNetNodeBtn.addEventListener("click", () => {
     if (!state.selectedNet) {
       return;
diff --git a/frontend/index.html b/frontend/index.html
index 1b5e9de..8330fea 100644
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -92,6 +92,9 @@
             <div class="editorActions">
               <button id="rotateSelectedBtn">Rotate +90</button>
               <button id="updatePlacementBtn">Apply Component</button>
+              <button id="duplicateComponentBtn">Duplicate</button>
+              <button id="deleteComponentBtn">Delete</button>
+              <button id="isolateSelectedComponentBtn">Isolate</button>
             </div>
           </div>
           <div id="symbolEditor" class="editorCard hidden">
@@ -180,6 +183,7 @@
             </div>
             <div class="editorActions">
               <button id="updateNetBtn">Apply Net</button>
+              <button id="isolateSelectedNetBtn">Isolate</button>
             </div>
             <div class="editorGrid">
               <label>Node Ref <input id="netNodeRefInput" type="text" placeholder="U1" /></label>