diff --git a/src/components/editor/EditorControls.tsx b/src/components/editor/EditorControls.tsx
index e441db0..633fbb6 100644
--- a/src/components/editor/EditorControls.tsx
+++ b/src/components/editor/EditorControls.tsx
@@ -12,6 +12,7 @@ import {
   Save,
   Undo2,
 } from "lucide-react";
+import { EditorDialogueManifestPanel } from "@/components/editor/EditorDialogueManifestPanel";
 import { EditorSrtPanel } from "@/components/editor/EditorSrtPanel";
 import type { MapNode, TransformMode } from "@/types/editor/editor";
 
@@ -238,6 +239,7 @@ export function EditorControls({
           </div>
         </section>
 
+        <EditorDialogueManifestPanel />
         <EditorSrtPanel />
       </aside>
     </>
diff --git a/src/components/editor/EditorDialogueManifestPanel.tsx b/src/components/editor/EditorDialogueManifestPanel.tsx
new file mode 100644
index 0000000..47df10b
--- /dev/null
+++ b/src/components/editor/EditorDialogueManifestPanel.tsx
@@ -0,0 +1,365 @@
+import { useEffect, useState } from "react";
+import { Plus, RefreshCw, Save, Trash2 } from "lucide-react";
+import type {
+  DialogueDefinition,
+  DialogueManifest,
+  DialogueVoiceId,
+} from "@/types/dialogues/dialogues";
+import { loadDialogueManifest } from "@/utils/dialogues/loadDialogueManifest";
+
+const DEFAULT_VOICE: DialogueVoiceId = "narrateur";
+type DialoguePatch = Partial<Omit<DialogueDefinition, "timecode">> & {
+  timecode?: number | undefined;
+};
+
+function createDialogue(index: number): DialogueDefinition {
+  return {
+    id: `new_dialogue_${index}`,
+    voice: DEFAULT_VOICE,
+    audio: "/sounds/dialogue/new_dialogue.mp3",
+    subtitleCueIndex: 1,
+  };
+}
+
+function getManifestErrors(manifest: DialogueManifest | null): string[] {
+  if (!manifest) return ["Manifeste absent."];
+
+  const errors: string[] = [];
+  const ids = new Set<string>();
+
+  manifest.dialogues.forEach((dialogue, index) => {
+    const label = dialogue.id || `Dialogue ${index + 1}`;
+
+    if (!dialogue.id.trim()) errors.push(`${label}: id obligatoire.`);
+    if (ids.has(dialogue.id)) errors.push(`${label}: id duplique.`);
+    ids.add(dialogue.id);
+
+    if (!dialogue.audio.startsWith("/sounds/dialogue/")) {
+      errors.push(`${label}: audio doit commencer par /sounds/dialogue/.`);
+    }
+
+    if (!Number.isInteger(dialogue.subtitleCueIndex)) {
+      errors.push(`${label}: cue SRT invalide.`);
+    }
+
+    if (
+      dialogue.timecode !== undefined &&
+      (!Number.isFinite(dialogue.timecode) || dialogue.timecode < 0)
+    ) {
+      errors.push(`${label}: timecode invalide.`);
+    }
+  });
+
+  return errors;
+}
+
+async function saveDialogueManifest(manifest: DialogueManifest): Promise<void> {
+  const response = await fetch("/api/save-dialogues", {
+    method: "POST",
+    headers: { "Content-Type": "application/json" },
+    body: JSON.stringify(manifest),
+  });
+
+  if (!response.ok) {
+    const body = (await response.json().catch(() => null)) as {
+      error?: string;
+    } | null;
+    throw new Error(body?.error ?? "Sauvegarde du manifeste impossible");
+  }
+}
+
+function getPatchedDialogue(
+  dialogue: DialogueDefinition,
+  patch: DialoguePatch,
+): DialogueDefinition {
+  const nextDialogue: DialogueDefinition = {
+    id: patch.id ?? dialogue.id,
+    voice: patch.voice ?? dialogue.voice,
+    audio: patch.audio ?? dialogue.audio,
+    subtitleCueIndex: patch.subtitleCueIndex ?? dialogue.subtitleCueIndex,
+  };
+
+  if ("timecode" in patch) {
+    if (patch.timecode !== undefined) nextDialogue.timecode = patch.timecode;
+  } else if (dialogue.timecode !== undefined) {
+    nextDialogue.timecode = dialogue.timecode;
+  }
+
+  return nextDialogue;
+}
+
+export function EditorDialogueManifestPanel(): React.JSX.Element {
+  const [manifest, setManifest] = useState<DialogueManifest | null>(null);
+  const [selectedDialogueId, setSelectedDialogueId] = useState("");
+  const [status, setStatus] = useState("Chargement du manifeste...");
+  const [isSaving, setIsSaving] = useState(false);
+  const errors = getManifestErrors(manifest);
+  const selectedDialogue =
+    manifest?.dialogues.find(
+      (dialogue) => dialogue.id === selectedDialogueId,
+    ) ??
+    manifest?.dialogues[0] ??
+    null;
+  const voices = manifest?.voices ?? [];
+
+  async function handleLoad(): Promise<void> {
+    setStatus("Chargement du manifeste...");
+
+    try {
+      const loadedManifest = await loadDialogueManifest();
+      setManifest(loadedManifest);
+      setSelectedDialogueId(loadedManifest?.dialogues[0]?.id ?? "");
+      setStatus(
+        loadedManifest
+          ? `Manifeste charge: ${loadedManifest.dialogues.length} dialogues.`
+          : "Manifeste introuvable ou invalide.",
+      );
+    } catch (err) {
+      const message = err instanceof Error ? err.message : "Erreur inconnue";
+      setStatus(message);
+      setManifest(null);
+    }
+  }
+
+  async function handleSave(): Promise<void> {
+    if (!manifest) return;
+    if (errors.length > 0) {
+      setStatus("Corrige les erreurs avant de sauvegarder.");
+      return;
+    }
+
+    setIsSaving(true);
+    setStatus("Sauvegarde du manifeste...");
+
+    try {
+      await saveDialogueManifest(manifest);
+      setStatus(
+        "Manifeste sauvegarde dans public/sounds/dialogue/dialogues.json.",
+      );
+    } catch (err) {
+      const message = err instanceof Error ? err.message : "Erreur inconnue";
+      setStatus(message);
+    } finally {
+      setIsSaving(false);
+    }
+  }
+
+  function handleAddDialogue(): void {
+    if (!manifest) return;
+
+    const dialogue = createDialogue(manifest.dialogues.length + 1);
+    setManifest({
+      ...manifest,
+      dialogues: [...manifest.dialogues, dialogue],
+    });
+    setSelectedDialogueId(dialogue.id);
+    setStatus("Nouveau dialogue ajoute localement.");
+  }
+
+  function handleRemoveDialogue(dialogueId: string): void {
+    if (!manifest) return;
+
+    const nextDialogues = manifest.dialogues.filter(
+      (dialogue) => dialogue.id !== dialogueId,
+    );
+    setManifest({ ...manifest, dialogues: nextDialogues });
+    setSelectedDialogueId(nextDialogues[0]?.id ?? "");
+    setStatus("Dialogue supprime localement.");
+  }
+
+  function updateSelectedDialogue(
+    patch: DialoguePatch,
+    nextId = selectedDialogueId,
+  ): void {
+    if (!manifest || !selectedDialogue) return;
+
+    setManifest({
+      ...manifest,
+      dialogues: manifest.dialogues.map((dialogue) =>
+        dialogue.id === selectedDialogue.id
+          ? getPatchedDialogue(dialogue, patch)
+          : dialogue,
+      ),
+    });
+    setSelectedDialogueId(nextId);
+  }
+
+  useEffect(() => {
+    let mounted = true;
+
+    void loadDialogueManifest()
+      .then((loadedManifest) => {
+        if (!mounted) return;
+
+        setManifest(loadedManifest);
+        setSelectedDialogueId(loadedManifest?.dialogues[0]?.id ?? "");
+        setStatus(
+          loadedManifest
+            ? `Manifeste charge: ${loadedManifest.dialogues.length} dialogues.`
+            : "Manifeste introuvable ou invalide.",
+        );
+      })
+      .catch((err: unknown) => {
+        if (!mounted) return;
+
+        const message = err instanceof Error ? err.message : "Erreur inconnue";
+        setStatus(message);
+        setManifest(null);
+      });
+
+    return () => {
+      mounted = false;
+    };
+  }, []);
+
+  return (
+    <section
+      className="editor-dialogue-manifest-section"
+      aria-labelledby="dialogue-manifest-heading"
+    >
+      <div className="editor-section-heading">
+        <h3 id="dialogue-manifest-heading">Dialogues</h3>
+        <span>{manifest?.dialogues.length ?? 0} items</span>
+      </div>
+
+      <div className="editor-dialogue-manifest-actions">
+        <button type="button" onClick={() => void handleLoad()}>
+          <RefreshCw size={14} aria-hidden="true" />
+          Reload
+        </button>
+        <button type="button" disabled={!manifest} onClick={handleAddDialogue}>
+          <Plus size={14} aria-hidden="true" />
+          Add
+        </button>
+        <button
+          type="button"
+          disabled={!manifest || errors.length > 0 || isSaving}
+          onClick={() => void handleSave()}
+        >
+          <Save size={14} aria-hidden="true" />
+          {isSaving ? "Saving..." : "Save"}
+        </button>
+      </div>
+
+      {manifest && (
+        <label className="editor-dialogue-manifest-select">
+          Dialogue
+          <select
+            value={selectedDialogue?.id ?? ""}
+            onChange={(event) => setSelectedDialogueId(event.target.value)}
+          >
+            {manifest.dialogues.map((dialogue) => (
+              <option key={dialogue.id} value={dialogue.id}>
+                {dialogue.id || "Dialogue sans id"}
+              </option>
+            ))}
+          </select>
+        </label>
+      )}
+
+      {selectedDialogue && (
+        <div className="editor-dialogue-manifest-form">
+          <label>
+            ID
+            <input
+              value={selectedDialogue.id}
+              onChange={(event) =>
+                updateSelectedDialogue(
+                  { id: event.target.value },
+                  event.target.value,
+                )
+              }
+            />
+          </label>
+
+          <label>
+            Voix
+            <select
+              value={selectedDialogue.voice}
+              onChange={(event) =>
+                updateSelectedDialogue({
+                  voice: event.target.value as DialogueVoiceId,
+                })
+              }
+            >
+              {voices.map((voice) => (
+                <option key={voice.id} value={voice.id}>
+                  {voice.speaker}
+                </option>
+              ))}
+            </select>
+          </label>
+
+          <label>
+            Audio
+            <input
+              value={selectedDialogue.audio}
+              onChange={(event) =>
+                updateSelectedDialogue({ audio: event.target.value })
+              }
+            />
+          </label>
+
+          <label>
+            Cue SRT
+            <input
+              type="number"
+              min="1"
+              step="1"
+              value={selectedDialogue.subtitleCueIndex}
+              onChange={(event) =>
+                updateSelectedDialogue({
+                  subtitleCueIndex: Math.max(1, Number(event.target.value)),
+                })
+              }
+            />
+          </label>
+
+          <label>
+            Timecode global optionnel
+            <input
+              type="number"
+              min="0"
+              step="0.1"
+              value={selectedDialogue.timecode ?? ""}
+              placeholder="Aucun"
+              onChange={(event) => {
+                const value = event.target.value.trim();
+                updateSelectedDialogue({
+                  timecode: value === "" ? undefined : Number(value),
+                });
+              }}
+            />
+          </label>
+
+          <button
+            className="editor-dialogue-manifest-delete"
+            type="button"
+            onClick={() => handleRemoveDialogue(selectedDialogue.id)}
+          >
+            <Trash2 size={14} aria-hidden="true" />
+            Delete dialogue
+          </button>
+        </div>
+      )}
+
+      <p className="editor-dialogue-manifest-status">{status}</p>
+      <div
+        className={`editor-dialogue-manifest-diagnostic ${errors.length === 0 ? "is-valid" : "is-invalid"}`}
+      >
+        <strong>
+          {errors.length === 0
+            ? "Manifeste local valide."
+            : `${errors.length} erreur${errors.length > 1 ? "s" : ""} locale${errors.length > 1 ? "s" : ""}.`}
+        </strong>
+        {errors.length > 0 && (
+          <ul>
+            {errors.map((error) => (
+              <li key={error}>{error}</li>
+            ))}
+          </ul>
+        )}
+      </div>
+    </section>
+  );
+}
diff --git a/src/index.css b/src/index.css
index 6a55483..b902f7b 100644
--- a/src/index.css
+++ b/src/index.css
@@ -1716,6 +1716,126 @@ canvas {
   color: #fca5a5;
 }
 
+/* Editor dialogue manifest panel */
+.editor-dialogue-manifest-section {
+  display: grid;
+  gap: 10px;
+  padding: 14px 12px 12px;
+  border-top: 1px solid rgba(255, 255, 255, 0.09);
+}
+
+.editor-dialogue-manifest-actions {
+  display: grid;
+  grid-template-columns: repeat(3, 1fr);
+  gap: 8px;
+}
+
+.editor-dialogue-manifest-actions button,
+.editor-dialogue-manifest-delete {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  gap: 6px;
+  padding: 8px 9px;
+  border: 1px solid #2f2f2f;
+  border-radius: 12px;
+  background: #151515;
+  color: #f2f2f2;
+  cursor: pointer;
+  font-size: 0.72rem;
+  font-weight: 800;
+}
+
+.editor-dialogue-manifest-actions button:hover,
+.editor-dialogue-manifest-delete:hover {
+  border-color: #ffffff;
+  background: #202020;
+}
+
+.editor-dialogue-manifest-actions button:disabled {
+  cursor: not-allowed;
+  opacity: 0.45;
+}
+
+.editor-dialogue-manifest-select,
+.editor-dialogue-manifest-form label {
+  display: grid;
+  gap: 5px;
+  color: #8d8d8d;
+  font-size: 0.72rem;
+  font-weight: 700;
+  letter-spacing: 0.08em;
+  text-transform: uppercase;
+}
+
+.editor-dialogue-manifest-select select,
+.editor-dialogue-manifest-form input,
+.editor-dialogue-manifest-form select {
+  width: 100%;
+  box-sizing: border-box;
+  padding: 9px 10px;
+  border: 1px solid #242424;
+  border-radius: 12px;
+  background: #101010;
+  color: #f2f2f2;
+}
+
+.editor-dialogue-manifest-select select:focus,
+.editor-dialogue-manifest-form input:focus,
+.editor-dialogue-manifest-form select:focus {
+  border-color: #ffffff;
+  outline: none;
+}
+
+.editor-dialogue-manifest-form {
+  display: grid;
+  gap: 8px;
+  padding: 10px;
+  border: 1px solid #1f1f1f;
+  border-radius: 16px;
+  background: #070707;
+}
+
+.editor-dialogue-manifest-delete {
+  border-color: rgba(248, 113, 113, 0.32);
+  color: #fca5a5;
+}
+
+.editor-dialogue-manifest-status {
+  margin: 0;
+  color: #8d8d8d;
+  font-size: 0.72rem;
+  line-height: 1.4;
+}
+
+.editor-dialogue-manifest-diagnostic {
+  display: grid;
+  gap: 6px;
+  padding: 9px 10px;
+  border: 1px solid #242424;
+  border-radius: 12px;
+  background: #101010;
+  font-size: 0.72rem;
+  line-height: 1.4;
+}
+
+.editor-dialogue-manifest-diagnostic.is-valid {
+  border-color: rgba(134, 239, 172, 0.32);
+  color: #86efac;
+}
+
+.editor-dialogue-manifest-diagnostic.is-invalid {
+  border-color: rgba(248, 113, 113, 0.38);
+  color: #fca5a5;
+}
+
+.editor-dialogue-manifest-diagnostic ul {
+  display: grid;
+  gap: 4px;
+  margin: 0;
+  padding-left: 16px;
+}
+
 /* Editor responsive layout */
 @media (max-width: 768px) {
   .editor-error h2 {
diff --git a/vite.config.ts b/vite.config.ts
index 020a984..a0ecc3e 100644
--- a/vite.config.ts
+++ b/vite.config.ts
@@ -12,6 +12,7 @@ const __dirname = fileURLToPath(new URL(".", import.meta.url));
 
 const MAX_MAP_PAYLOAD_BYTES = 1024 * 1024;
 const MAX_SRT_PAYLOAD_BYTES = 256 * 1024;
+const MAX_DIALOGUE_MANIFEST_PAYLOAD_BYTES = 256 * 1024;
 const JSON_HEADERS = { "Content-Type": "application/json" };
 type JsonValue = string | number | boolean | null | JsonValue[] | JsonObject;
 type JsonObject = { readonly [key: string]: JsonValue };
@@ -160,6 +161,52 @@ const validateDialoguesPlugin = (): Plugin => ({
   },
 });
 
+const saveDialogueManifestPlugin = (): Plugin => ({
+  name: "save-dialogue-manifest-api",
+  configureServer(server) {
+    server.middlewares.use("/api/save-dialogues", async (req, res) => {
+      if (req.method !== "POST") {
+        sendJson(res, 405, { error: "Method not allowed" }, { Allow: "POST" });
+        return;
+      }
+
+      const chunks: Buffer[] = [];
+      let size = 0;
+
+      for await (const chunk of req) {
+        const buffer = Buffer.isBuffer(chunk) ? chunk : Buffer.from(chunk);
+        size += buffer.length;
+        if (size > MAX_DIALOGUE_MANIFEST_PAYLOAD_BYTES) {
+          sendJson(res, 413, { error: "Payload too large" });
+          req.destroy();
+          return;
+        }
+        chunks.push(buffer);
+      }
+
+      try {
+        const data = JSON.parse(Buffer.concat(chunks).toString()) as unknown;
+        parseDialogueManifestData(data);
+
+        const manifestPath = path.resolve(
+          __dirname,
+          "public/sounds/dialogue/dialogues.json",
+        );
+        await fs.promises.writeFile(
+          manifestPath,
+          `${JSON.stringify(data, null, 2)}\n`,
+          "utf8",
+        );
+        sendJson(res, 200, { success: true });
+      } catch (err) {
+        const status = err instanceof SyntaxError ? 400 : 500;
+        const message = err instanceof Error ? err.message : "Unknown error";
+        sendJson(res, status, { error: message });
+      }
+    });
+  },
+});
+
 interface SrtPayload {
   voice: string;
   language: string;
@@ -173,6 +220,7 @@ interface DialogueManifestData {
 
 interface DialogueVoiceData {
   id: string;
+  speaker: string;
   subtitles: Partial<Record<"fr" | "en", string>>;
 }
 
@@ -181,6 +229,7 @@ interface DialogueData {
   voice: string;
   audio: string;
   subtitleCueIndex: number;
+  timecode?: number;
 }
 
 function isSrtPayload(data: unknown): data is SrtPayload {
@@ -302,6 +351,10 @@ function parseDialogueVoiceData(data: unknown): DialogueVoiceData {
     throw new Error("Invalid dialogue voice");
   }
 
+  if (typeof data.speaker !== "string") {
+    throw new Error(`Dialogue voice ${data.id} must define a speaker`);
+  }
+
   if (!isRecord(data.subtitles)) {
     throw new Error(`Dialogue voice ${data.id} must define subtitles`);
   }
@@ -312,6 +365,7 @@ function parseDialogueVoiceData(data: unknown): DialogueVoiceData {
 
   return {
     id: data.id,
+    speaker: data.speaker,
     subtitles,
   };
 }
@@ -332,12 +386,21 @@ function parseDialogueData(data: unknown, voiceIds: Set<string>): DialogueData {
     throw new Error("Invalid dialogue definition");
   }
 
-  return {
+  const dialogue: DialogueData = {
     id: data.id,
     voice: data.voice,
     audio: data.audio,
     subtitleCueIndex: data.subtitleCueIndex,
   };
+
+  if (data.timecode !== undefined) {
+    if (typeof data.timecode !== "number") {
+      throw new Error("Invalid dialogue definition");
+    }
+    dialogue.timecode = data.timecode;
+  }
+
+  return dialogue;
 }
 
 function isRecord(value: unknown): value is Record<string, unknown> {
@@ -383,6 +446,7 @@ export default defineConfig({
     react(),
     saveMapPlugin(),
     saveSrtPlugin(),
+    saveDialogueManifestPlugin(),
     validateDialoguesPlugin(),
   ],
   resolve: {