diff --git a/abogen/web/routes/api.py b/abogen/web/routes/api.py
index 84973b0..57b1579 100644
--- a/abogen/web/routes/api.py
+++ b/abogen/web/routes/api.py
@@ -215,6 +215,7 @@ def api_voice_profiles_preview() -> ResponseReturnValue:
 @api_bp.post("/speaker-preview")
 def api_speaker_preview() -> ResponseReturnValue:
     payload = request.get_json(force=True, silent=True) or {}
+    pending_id = str(payload.get("pending_id") or "").strip()
     text = payload.get("text", "Hello world")
     voice = payload.get("voice", "af_heart")
     language = payload.get("language", "a")
@@ -243,6 +244,19 @@ def api_speaker_preview() -> ResponseReturnValue:
 
     if not resolved_provider:
         resolved_provider = "supertonic" if str(base_spec or "").strip() in {"M1","M2","M3","M4","M5","F1","F2","F3","F4","F5"} else "kokoro"
+
+    pronunciation_overrides = None
+    manual_overrides = None
+    speakers = None
+    if pending_id:
+        try:
+            pending = get_service().get_pending_job(pending_id)
+        except Exception:
+            pending = None
+        if pending is not None:
+            manual_overrides = getattr(pending, "manual_overrides", None)
+            pronunciation_overrides = getattr(pending, "pronunciation_overrides", None)
+            speakers = getattr(pending, "speakers", None)
     
     try:
         return synthesize_preview(
@@ -254,6 +268,9 @@ def api_speaker_preview() -> ResponseReturnValue:
             ,
             tts_provider=resolved_provider,
             supertonic_total_steps=supertonic_total_steps or int(settings.get("supertonic_total_steps") or 5),
+            pronunciation_overrides=pronunciation_overrides,
+            manual_overrides=manual_overrides,
+            speakers=speakers,
         )
     except Exception as e:
         return jsonify({"error": str(e)}), 500
diff --git a/abogen/web/routes/utils/preview.py b/abogen/web/routes/utils/preview.py
index b8eed4e..95bf6ba 100644
--- a/abogen/web/routes/utils/preview.py
+++ b/abogen/web/routes/utils/preview.py
@@ -1,6 +1,6 @@
 import io
 import threading
-from typing import Any, Dict, List, Optional, Tuple
+from typing import Any, Dict, Iterable, List, Mapping, Optional, Tuple
 import numpy as np
 import soundfile as sf
 from flask import current_app, send_file
@@ -61,21 +61,47 @@ def generate_preview_audio(
     tts_provider: str = "kokoro",
     supertonic_total_steps: int = 5,
     max_seconds: float = 8.0,
+    pronunciation_overrides: Optional[Iterable[Mapping[str, Any]]] = None,
+    manual_overrides: Optional[Iterable[Mapping[str, Any]]] = None,
+    speakers: Optional[Mapping[str, Any]] = None,
 ) -> bytes:
     if not text.strip():
         raise ValueError("Preview text is required")
 
     provider = (tts_provider or "kokoro").strip().lower()
 
-    normalized_text = text
+    # Apply pronunciation/manual overrides first so tokens like `Unfu*k` still match
+    # before any downstream normalization potentially strips punctuation.
+    source_text = text
+    if pronunciation_overrides or manual_overrides or speakers:
+        try:
+            from abogen.web import conversion_runner as runner
+
+            class _PreviewJob:
+                def __init__(self):
+                    self.language = language
+                    self.voice = voice_spec
+                    self.speakers = speakers
+                    self.manual_overrides = list(manual_overrides or [])
+                    self.pronunciation_overrides = list(pronunciation_overrides or [])
+
+            job = _PreviewJob()
+            merged = runner._merge_pronunciation_overrides(job)
+            rules = runner._compile_pronunciation_rules(merged)
+            source_text = runner._apply_pronunciation_rules(source_text, rules)
+        except Exception:
+            current_app.logger.exception("Preview override application failed; using raw text")
+            source_text = text
+
+    normalized_text = source_text
     if provider != "supertonic":
         try:
             from abogen.kokoro_text_normalization import normalize_for_pipeline
 
-            normalized_text = normalize_for_pipeline(text)
+            normalized_text = normalize_for_pipeline(source_text)
         except Exception:
             current_app.logger.exception("Preview normalization failed; using raw text")
-            normalized_text = text
+            normalized_text = source_text
 
     if provider == "supertonic":
         from abogen.tts_supertonic import SupertonicPipeline
@@ -152,6 +178,9 @@ def synthesize_preview(
     tts_provider: str = "kokoro",
     supertonic_total_steps: int = 5,
     max_seconds: float = 8.0,
+    pronunciation_overrides: Optional[Iterable[Mapping[str, Any]]] = None,
+    manual_overrides: Optional[Iterable[Mapping[str, Any]]] = None,
+    speakers: Optional[Mapping[str, Any]] = None,
 ) -> ResponseReturnValue:
     try:
         audio_bytes = generate_preview_audio(
@@ -163,6 +192,9 @@ def synthesize_preview(
             tts_provider=tts_provider,
             supertonic_total_steps=supertonic_total_steps,
             max_seconds=max_seconds,
+            pronunciation_overrides=pronunciation_overrides,
+            manual_overrides=manual_overrides,
+            speakers=speakers,
         )
     except Exception as e:
         raise e
diff --git a/abogen/web/static/speakers.js b/abogen/web/static/speakers.js
index fed4117..23affcb 100644
--- a/abogen/web/static/speakers.js
+++ b/abogen/web/static/speakers.js
@@ -77,6 +77,15 @@ const playPreview = async (button) => {
     max_seconds: 8,
   };
 
+  const pendingId =
+    button.dataset.pendingId ||
+    button.closest("[data-pending-id]")?.dataset.pendingId ||
+    document.querySelector('[data-role="prepare-form"]')?.dataset.pendingId ||
+    "";
+  if (pendingId) {
+    payload.pending_id = pendingId;
+  }
+
   stopCurrentPlayback();
   activeButton = button;
   setLoadingState(button, true);
diff --git a/tests/test_preview_applies_manual_overrides.py b/tests/test_preview_applies_manual_overrides.py
new file mode 100644
index 0000000..5044c51
--- /dev/null
+++ b/tests/test_preview_applies_manual_overrides.py
@@ -0,0 +1,49 @@
+from abogen.web.routes.utils import preview
+
+
+def test_preview_applies_manual_override_before_normalization(monkeypatch):
+    # Don't run real TTS/normalization; just exercise the override stage by
+    # forcing provider=kokoro and then stubbing normalize_for_pipeline.
+
+    monkeypatch.setattr(preview, "get_preview_pipeline", lambda language, device: None)
+
+    # Stub normalize_for_pipeline to be identity; we only care that overrides run.
+    class _Norm:
+        @staticmethod
+        def normalize_for_pipeline(text):
+            return text
+
+    monkeypatch.setitem(__import__("sys").modules, "abogen.kokoro_text_normalization", _Norm)
+
+    # And stub the kokoro pipeline path so generate_preview_audio won't proceed.
+    # We'll instead validate by calling the override logic through generate_preview_audio
+    # with provider=supertonic and stub SupertonicPipeline to capture input.
+    captured = {}
+
+    class DummyPipeline:
+        def __init__(self, **kwargs):
+            pass
+
+        def __call__(self, text, **kwargs):
+            captured["text"] = text
+            return iter(())
+
+    monkeypatch.setitem(__import__("sys").modules, "abogen.tts_supertonic", type("M", (), {"SupertonicPipeline": DummyPipeline}))
+
+    try:
+        preview.generate_preview_audio(
+            text="He said Unfu*k loudly.",
+            voice_spec="M1",
+            language="en",
+            speed=1.0,
+            use_gpu=False,
+            tts_provider="supertonic",
+            manual_overrides=[{"token": "Unfu*k", "pronunciation": "Unfuck"}],
+        )
+    except Exception:
+        # generate_preview_audio will raise because no audio chunks; that's fine.
+        pass
+
+    assert "text" in captured
+    assert "Unfuck" in captured["text"]
+    assert "Unfu*k" not in captured["text"]