diff --git a/stt_voice_messages/__init__.py b/stt_voice_messages/__init__.py
new file mode 100644
index 0000000..81ba31c
--- /dev/null
+++ b/stt_voice_messages/__init__.py
@@ -0,0 +1 @@
+from .stt_voice_messages import STTVoiceMessagesPlugin  # pyright: ignore  # noqa: F401
diff --git a/stt_voice_messages/gtk/config_dialog.py b/stt_voice_messages/gtk/config_dialog.py
new file mode 100644
index 0000000..dad57e4
--- /dev/null
+++ b/stt_voice_messages/gtk/config_dialog.py
@@ -0,0 +1,100 @@
+# This file is part of Gajim.
+#
+# Gajim is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Gajim is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Gajim. If not, see <http://www.gnu.org/licenses/>.
+
+from __future__ import annotations
+
+from typing import Any
+from typing import TYPE_CHECKING
+
+from gi.repository import Gtk
+
+from gajim.gtk.const import Setting
+from gajim.gtk.const import SettingKind
+from gajim.gtk.const import SettingType
+from gajim.gtk.settings import SettingsDialog
+from gajim.plugins.plugins_i18n import _
+
+if TYPE_CHECKING:
+    from ..stt_voice_messages import STTVoiceMessagesPlugin
+
+
+class STTVoiceMessagesConfigDialog(SettingsDialog):
+    def __init__(self, plugin: STTVoiceMessagesPlugin, parent: Gtk.Window) -> None:
+
+        self.plugin = plugin
+        model = plugin.model
+
+        if not model.available():
+            status = _('onnx-asr is not installed. Run: pip install "onnx-asr[hub]"')
+        elif model.is_loaded:
+            status = _("Model is loaded.")
+        elif model.will_download:
+            status = _("Model files will be downloaded on first use.")
+        else:
+            status = _("Model files are downloaded and ready.")
+
+        settings = [
+            Setting(
+                SettingKind.SWITCH,
+                _("Transcribe automatically"),
+                SettingType.VALUE,
+                bool(plugin.config["auto_transcribe"]),
+                callback=self._on_setting,
+                data="auto_transcribe",
+                desc=_("Transcribe voice messages as soon as they are displayed"),
+            ),
+            Setting(
+                SettingKind.ENTRY,
+                _("Model"),
+                SettingType.VALUE,
+                str(plugin.config["model_id"]),
+                callback=self._on_setting,
+                data="model_id",
+                desc=_("onnx-asr model name or Hugging Face repository"),
+            ),
+            Setting(
+                SettingKind.DROPDOWN,
+                _("Quantization"),
+                SettingType.VALUE,
+                str(plugin.config["quantization"]),
+                callback=self._on_setting,
+                data="quantization",
+                props={
+                    "data": {
+                        "int8": _("int8 (fast, ~600 MB download)"),
+                        "fp32": _("Full precision (~2.4 GB download)"),
+                    }
+                },
+                desc=_("Applied the next time the model is loaded"),
+            ),
+            Setting(SettingKind.GENERIC, _("Status"), SettingType.VALUE, desc=status),
+        ]
+
+        SettingsDialog.__init__(
+            self,
+            parent,
+            _("STT Voice Messages Configuration"),
+            Gtk.DialogFlags.MODAL,
+            settings,
+            "",
+        )
+
+    def _on_setting(self, value: Any, data: Any) -> None:
+        self.plugin.config[data] = value
+        if data in ("model_id", "quantization"):
+            self.plugin.model.set_config(
+                str(self.plugin.config["model_id"]),
+                str(self.plugin.config["quantization"]),
+            )
diff --git a/stt_voice_messages/gtk/sttbox.py b/stt_voice_messages/gtk/sttbox.py
new file mode 100644
index 0000000..dc7e167
--- /dev/null
+++ b/stt_voice_messages/gtk/sttbox.py
@@ -0,0 +1,155 @@
+# This file is part of Gajim.
+#
+# Gajim is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Gajim is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Gajim. If not, see <http://www.gnu.org/licenses/>.
+
+from __future__ import annotations
+
+from typing import Any
+
+import logging
+from pathlib import Path
+
+from gi.repository import Adw
+from gi.repository import Gio
+from gi.repository import GLib
+from gi.repository import GObject
+from gi.repository import Gtk
+
+from gajim.plugins.plugins_i18n import _
+
+from ..model import OnnxAsrModel
+
+log = logging.getLogger("gajim.p.stt_voice_messages_sttbox")
+
+
+class STTBox(Gtk.Box):
+    def __init__(self, model: OnnxAsrModel, audio_file: Path) -> None:
+        Gtk.Box.__init__(self, orientation=Gtk.Orientation.VERTICAL, spacing=6)
+        self.set_margin_top(6)
+        self.set_halign(Gtk.Align.CENTER)
+        self.set_visible(False)
+
+        self._model = model
+        self._audio_file = audio_file
+        self._task: Gio.Task | None = None
+
+        self._transcribe_button = Gtk.Button.new_from_icon_name(
+            "lucide-square-pen-symbolic"
+        )
+        self._transcribe_button.set_tooltip_text(_("Transcribe voice message"))
+        self._transcribe_button.set_valign(Gtk.Align.CENTER)
+        self._transcribe_button.connect("clicked", self._on_transcribe_clicked)
+
+        self._spinner = Adw.Spinner(valign=Gtk.Align.CENTER, visible=False)
+
+        self._transcription_label = Gtk.Label()
+        self._transcription_label.set_max_width_chars(40)
+        self._transcription_label.set_wrap(True)
+        self._transcription_label.set_xalign(0)
+        self._transcription_label.set_selectable(True)
+
+        self.append(self._spinner)
+        self.append(self._transcription_label)
+
+    @property
+    def button(self) -> Gtk.Button:
+        return self._transcribe_button
+
+    def transcribe(self) -> None:
+        self._on_transcribe_clicked(self._transcribe_button)
+
+    def _on_transcribe_clicked(self, _button: Gtk.Button) -> None:
+        if not self._model.available():
+            self._show_status(
+                _('onnx-asr is not installed. Run: pip install "onnx-asr[hub]"'),
+                busy=False,
+            )
+            return
+
+        if self._model.is_loaded:
+            text = _("Transcribing…")
+        elif self._model.will_download:
+            text = _("Downloading model…")
+        else:
+            text = _("Loading model…")
+
+        self._show_status(text, busy=True)
+        self._run_bg(self._model.load, self._on_load_done)
+
+    def _on_load_done(self) -> None:
+        try:
+            self._finish()
+        except Exception as e:
+            self._show_status(_("Error: {}").format(e), busy=False)
+            return
+
+        self._show_status(_("Transcribing…"), busy=True)
+        self._run_bg(
+            lambda: self._model.recognize(self._audio_file, self._on_partial),
+            self._show_result,
+        )
+
+    def _on_partial(self, text: str) -> None:
+        GLib.idle_add(self._set_partial, text)
+
+    def _set_partial(self, text: str) -> None:
+        self._transcription_label.set_text(text)
+
+    def _show_result(self) -> None:
+        try:
+            text = self._finish()
+        except Exception as e:
+            self._show_status(_("Error: {}").format(e), busy=False)
+            return
+
+        text = text.strip()
+        if not text:
+            text = _("No speech detected.")
+        self._show_status(text, busy=False)
+
+    def _run_bg(self, fn, on_done) -> None:
+        self._bg_fn = fn
+
+        def _cb(_source: GObject.Object, _result: Gio.AsyncResult, _data: None) -> None:
+            on_done()
+
+        self._task = Gio.Task.new(self, None, _cb, None)
+        self._task.run_in_thread(self._thread_cb)
+
+    @staticmethod
+    def _thread_cb(
+        task: Gio.Task,
+        source: "STTBox",
+        _data: None,
+        _cancel: Gio.Cancellable,
+    ) -> None:
+        try:
+            task.return_value(source._bg_fn())
+        except Exception as e:
+            task.return_value(e)
+
+    def _finish(self) -> Any:
+        task = self._task
+        self._task = None
+        value = task.propagate_value().value
+        if isinstance(value, Exception):
+            raise value
+        return value
+
+    def _show_status(self, text: str, busy: bool) -> None:
+        self._transcription_label.set_text(text)
+        self._transcription_label.set_visible(True)
+        self.set_visible(True)
+        self._spinner.set_visible(busy)
+        self._transcribe_button.set_sensitive(not busy)
diff --git a/stt_voice_messages/model.py b/stt_voice_messages/model.py
new file mode 100644
index 0000000..e976705
--- /dev/null
+++ b/stt_voice_messages/model.py
@@ -0,0 +1,164 @@
+# This file is part of Gajim.
+#
+# Gajim is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Gajim is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Gajim. If not, see <http://www.gnu.org/licenses/>.
+
+from __future__ import annotations
+
+from typing import Any
+
+import gc
+import logging
+import threading
+from collections.abc import Callable
+from importlib.util import find_spec
+from pathlib import Path
+
+import numpy as np
+from gi.repository import GLib
+from gi.repository import Gst
+
+log = logging.getLogger("gajim.p.sttvm_model")
+
+_IDLE_UNLOAD_SECONDS = 300
+
+
+def load_audio(path: Path, sample_rate: int = 16000) -> np.ndarray:
+    Gst.init(None)
+    pipeline = Gst.parse_launch(
+        "filesrc name=src ! decodebin ! audioconvert ! audioresample ! "
+        f"audio/x-raw,format=F32LE,rate={sample_rate},channels=1 ! "
+        "appsink name=sink sync=false"
+    )
+
+    pipeline.get_by_name("src").set_property("location", str(path))
+    sink = pipeline.get_by_name("sink")
+
+    chunks: list[np.ndarray] = []
+    try:
+        pipeline.set_state(Gst.State.PLAYING)
+        while (sample := sink.emit("try-pull-sample", 10 * Gst.SECOND)) is not None:
+            buf = sample.get_buffer()
+            _, info = buf.map(Gst.MapFlags.READ)
+            chunks.append(np.frombuffer(bytes(info.data), dtype=np.float32))
+            buf.unmap(info)
+        pipeline.set_state(Gst.State.NULL)
+        # wait for async cleanup so decodebin/appsink release memory
+        pipeline.get_state(Gst.CLOCK_TIME_NONE)
+    finally:
+        del pipeline
+        gc.collect()
+
+    if not chunks:
+        raise RuntimeError(f"Could not decode audio: {path}")
+    return np.concatenate(chunks)
+
+
+class OnnxAsrModel:
+    def __init__(self, model_id: str, quantization: str) -> None:
+        self._model_id = model_id
+        self._quantization = quantization
+        self._model: Any = None
+        self._loaded = False
+        self._busy = False
+        self._recognize_lock = threading.Lock()
+        self._unload_source: int | None = None
+
+    @staticmethod
+    def available() -> bool:
+        return find_spec("onnx_asr") is not None
+
+    @property
+    def is_loaded(self) -> bool:
+        return self._loaded
+
+    @property
+    def model_id(self) -> str:
+        return self._model_id
+
+    @property
+    def will_download(self) -> bool:
+        if self._loaded or not self.available():
+            return False
+        from huggingface_hub import try_to_load_from_cache
+        from onnx_asr.resolver import model_repos
+
+        repo = model_repos.get(self._model_id, self._model_id)
+        if "/" not in repo:
+            # Local path, nothing to download
+            return False
+        return not isinstance(try_to_load_from_cache(repo, "config.json"), str)
+
+    def set_config(self, model_id: str, quantization: str) -> None:
+        if model_id == self._model_id and quantization == self._quantization:
+            return
+        self.unload_now()
+        self._model_id = model_id
+        self._quantization = quantization
+
+    def load(self) -> None:
+        if self._loaded:
+            self._schedule_unload()
+            return
+
+        import onnx_asr
+
+        log.debug("Loading model %s", self._model_id)
+        providers = ["CUDAExecutionProvider", "CPUExecutionProvider"]
+        quantization = None if self._quantization == "fp32" else self._quantization
+        model = onnx_asr.load_model(self._model_id, quantization=quantization, providers=providers)
+        self._model = model.with_vad(onnx_asr.load_vad("silero"))
+        self._loaded = True
+        self._schedule_unload()
+
+    def recognize(
+        self,
+        audio_file: Path,
+        on_partial: Callable[[str], None] | None = None,
+    ) -> str:
+        # global lock, one transcription at a time
+        with self._recognize_lock:
+            self.load()
+            self._busy = True
+            try:
+                audio = load_audio(audio_file)
+                parts: list[str] = []
+                text = ""
+                for segment in self._model.recognize(audio, sample_rate=16000):
+                    parts.append(segment.text.strip())
+                    text = " ".join(part for part in parts if part)
+                    if on_partial is not None:
+                        on_partial(text)
+            finally:
+                self._busy = False
+        self._schedule_unload()
+        return text
+
+    def unload_now(self) -> None:
+        self._model = None
+        self._loaded = False
+        gc.collect()
+
+    def _schedule_unload(self) -> None:
+        if self._unload_source is not None:
+            GLib.source_remove(self._unload_source)
+        self._unload_source = GLib.timeout_add_seconds(
+            _IDLE_UNLOAD_SECONDS, self._unload_idle
+        )
+
+    def _unload_idle(self) -> bool:
+        if self._busy:
+            return GLib.SOURCE_CONTINUE
+        self._unload_source = None
+        self.unload_now()
+        return GLib.SOURCE_REMOVE
diff --git a/stt_voice_messages/org.gajim.Gajim.Plugin.stt_voice_messages.metainfo.xml b/stt_voice_messages/org.gajim.Gajim.Plugin.stt_voice_messages.metainfo.xml
new file mode 100644
index 0000000..dd3ed6e
--- /dev/null
+++ b/stt_voice_messages/org.gajim.Gajim.Plugin.stt_voice_messages.metainfo.xml
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<component type="addon">
+  <id>org.gajim.Gajim.Plugin.stt_voice_messages</id>
+  <extends>org.gajim.Gajim</extends>
+  <name>STT Voice Messages Plugin</name>
+  <summary>Transcribes voice messages to text</summary>
+  <url type="homepage">https://gajim.org/</url>
+  <metadata_license>CC-BY-SA-3.0</metadata_license>
+  <project_license>GPL-3.0-only</project_license>
+  <update_contact>gajim-devel_AT_gajim.org</update_contact>
+</component>
diff --git a/stt_voice_messages/plugin-manifest.json b/stt_voice_messages/plugin-manifest.json
new file mode 100644
index 0000000..aa8b87b
--- /dev/null
+++ b/stt_voice_messages/plugin-manifest.json
@@ -0,0 +1,20 @@
+{
+    "authors": [
+        "hueso"
+    ],
+    "description": "Transcribes voice messages to text.",
+    "homepage": "https://dev.gajim.org/gajim/gajim-plugins/wikis/STTVoiceMessagesPlugin",
+    "config_dialog": true,
+    "name": "STT Voice Messages",
+    "platforms": [
+        "others",
+        "linux",
+        "darwin",
+        "win32"
+    ],
+    "requirements": [
+        "gajim>=2.5.0"
+    ],
+    "short_name": "stt_voice_messages",
+    "version": "0.1.0"
+}
diff --git a/stt_voice_messages/stt_voice_messages.png b/stt_voice_messages/stt_voice_messages.png
new file mode 100644
index 0000000..f7cea2f
Binary files /dev/null and b/stt_voice_messages/stt_voice_messages.png differ
diff --git a/stt_voice_messages/stt_voice_messages.py b/stt_voice_messages/stt_voice_messages.py
new file mode 100644
index 0000000..b80fed1
--- /dev/null
+++ b/stt_voice_messages/stt_voice_messages.py
@@ -0,0 +1,70 @@
+# This file is part of Gajim.
+#
+# Gajim is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Gajim is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Gajim. If not, see <http://www.gnu.org/licenses/>.
+
+from __future__ import annotations
+
+import logging
+from functools import partial
+from pathlib import Path
+
+from gi.repository import Gtk
+
+from gajim.plugins import GajimPlugin
+from gajim.plugins.plugins_i18n import _
+
+from .gtk.config_dialog import STTVoiceMessagesConfigDialog
+from .gtk.sttbox import STTBox
+from .model import OnnxAsrModel
+
+log = logging.getLogger("gajim.p.stt_voice_messages")
+
+
+class STTVoiceMessagesPlugin(GajimPlugin):
+    def init(self) -> None:
+        self.description = _("Transcribes voice messages to text.")
+
+        self.config_default_values = {
+            "auto_transcribe": (False, ""),
+            "model_id": ("nemo-parakeet-tdt-0.6b-v3", ""),
+            "quantization": ("int8", ""),
+        }
+
+        self._model = OnnxAsrModel(
+            str(self.config["model_id"]), str(self.config["quantization"])
+        )
+        self.config_dialog = partial(STTVoiceMessagesConfigDialog, self)
+
+        self.gui_extension_points = {
+            "preview_audio": (self._on_preview_audio, None),
+        }
+
+    @property
+    def model(self) -> OnnxAsrModel:
+        return self._model
+
+    def deactivate(self) -> None:
+        self._model.unload_now()
+
+    def _on_preview_audio(
+        self, drawing_box: Gtk.Box, control_box: Gtk.Box, audio_file: Path
+    ) -> None:
+        content_box = drawing_box.get_parent().get_parent()
+
+        stt_box = STTBox(self._model, audio_file)
+        control_box.append(stt_box.button)
+        content_box.append(stt_box)
+
+        if self.config["auto_transcribe"]:
+            stt_box.transcribe()