diff --git a/frontends/ycdl_flask/backend/endpoints/channel_endpoints.py b/frontends/ycdl_flask/backend/endpoints/channel_endpoints.py
index 066a483..c416339 100644
--- a/frontends/ycdl_flask/backend/endpoints/channel_endpoints.py
+++ b/frontends/ycdl_flask/backend/endpoints/channel_endpoints.py
@@ -2,6 +2,7 @@ import flask; from flask import request
 import itertools
 
 from voussoirkit import flasktools
+from voussoirkit import pathclass
 
 import ycdl
 
@@ -157,6 +158,22 @@ def post_set_automark(channel_id):
 
     return flasktools.make_json_response({})
 
+@site.route('/channel/<channel_id>/set_download_directory', methods=['POST'])
+def post_set_download_directory(channel_id):
+    download_directory = request.form['download_directory']
+    channel = common.ycdldb.get_channel(channel_id)
+
+    try:
+        channel.set_download_directory(download_directory)
+    except pathclass.NotDirectory:
+        exc = {
+            'error_type': 'NOT_DIRECTORY',
+            'error_message': f'"{download_directory}" is not a directory.',
+        }
+        return flasktools.make_json_response(exc, status=400)
+
+    return flasktools.make_json_response({})
+
 @site.route('/channel/<channel_id>/set_queuefile_extension', methods=['POST'])
 def post_set_queuefile_extension(channel_id):
     extension = request.form['extension']
diff --git a/frontends/ycdl_flask/static/js/api.js b/frontends/ycdl_flask/static/js/api.js
index b3aabba..774c9af 100644
--- a/frontends/ycdl_flask/static/js/api.js
+++ b/frontends/ycdl_flask/static/js/api.js
@@ -47,6 +47,15 @@ function set_automark(channel_id, state, callback)
     return common.post(url, data, callback);
 }
 
+api.channels.set_download_directory =
+function set_download_directory(channel_id, download_directory, callback)
+{
+    const url = `/channel/${channel_id}/set_download_directory`;
+    const data = new FormData();
+    data.append("download_directory", download_directory);
+    return common.post(url, data, callback);
+}
+
 api.channels.set_queuefile_extension =
 function set_queuefile_extension(channel_id, extension, callback)
 {
diff --git a/frontends/ycdl_flask/templates/channel.html b/frontends/ycdl_flask/templates/channel.html
index ce6747d..9f74766 100644
--- a/frontends/ycdl_flask/templates/channel.html
+++ b/frontends/ycdl_flask/templates/channel.html
@@ -274,6 +274,11 @@ https://stackoverflow.com/a/35153397
         <button id="set_queuefile_extension_button" class="button_with_spinner" onclick="return set_queuefile_extension_form();">Set extension</button>
     </div>
 
+    <div>
+        <input type="text" id="set_download_directory_input" placeholder="Queuefile directory" value="{{channel.download_directory or ''}}"/>
+        <button id="set_download_directory_button" class="button_with_spinner" onclick="return set_download_directory_form();">Set directory</button>
+    </div>
+
     <div><a href="https://www.youtube.com/feeds/videos.xml?channel_id={{channel.id}}">Channel RSS</a></div>
 
     <button class="red_button button_with_confirm"
@@ -610,6 +615,21 @@ function set_automark_callback(response)
     set_automark_spinner.hide();
 }
 
+function set_download_directory_form(event)
+{
+    const download_directory = set_download_directory_input.value.trim();
+    api.channels.set_download_directory(CHANNEL_ID, download_directory, set_download_directory_callback);
+}
+
+function set_download_directory_callback(response)
+{
+    if (response.meta.status != 200)
+    {
+        alert(JSON.stringify(response));
+    }
+    window[set_download_directory_button.dataset.spinnerCloser]();
+}
+
 function set_queuefile_extension_form(event)
 {
     const extension = set_queuefile_extension_input.value.trim();
diff --git a/ycdl/objects.py b/ycdl/objects.py
index 133bd08..552ef7e 100644
--- a/ycdl/objects.py
+++ b/ycdl/objects.py
@@ -1,6 +1,7 @@
 import datetime
 import typing
 
+from voussoirkit import pathclass
 
 from . import constants
 from . import exceptions
@@ -35,13 +36,38 @@ class Channel(Base):
         self.id = db_row['id']
         self.name = db_row['name']
         self.uploads_playlist = db_row['uploads_playlist']
-        self.download_directory = db_row['download_directory']
+        self.download_directory = self.normalize_download_directory(
+            db_row['download_directory'],
+            do_assert=False,
+        )
         self.queuefile_extension = self.normalize_queuefile_extension(db_row['queuefile_extension'])
         self.automark = db_row['automark'] or 'pending'
 
     def __repr__(self):
         return f'Channel:{self.id}'
 
+    @staticmethod
+    def normalize_download_directory(
+            download_directory,
+            do_assert=True,
+        ) -> typing.Optional[pathclass.Path]:
+        if download_directory is None:
+            return None
+
+        if not isinstance(download_directory, (str, pathclass.Path)):
+            raise TypeError(f'download_directory should be {str} or {pathclass.Path}, not {type(download_directory)}.')
+
+        if isinstance(download_directory, str):
+            download_directory = download_directory.strip()
+            if not download_directory:
+                return None
+
+        download_directory = pathclass.Path(download_directory)
+        if do_assert:
+            download_directory.assert_is_directory()
+
+        return download_directory
+
     @staticmethod
     def normalize_queuefile_extension(queuefile_extension) -> typing.Optional[str]:
         if queuefile_extension is None:
@@ -178,6 +204,18 @@ class Channel(Base):
         if commit:
             self.ycdldb.commit()
 
+    def set_download_directory(self, download_directory, commit=True):
+        download_directory = self.normalize_download_directory(download_directory)
+
+        pairs = {
+            'id': self.id,
+            'download_directory': download_directory.absolute_path if download_directory else None,
+        }
+        self.ycdldb.sql_update(table='channels', pairs=pairs, where_key='id')
+        self.download_directory = download_directory
+
+        if commit:
+            self.ycdldb.commit()
 
     def set_queuefile_extension(self, queuefile_extension, commit=True):
         queuefile_extension = self.normalize_queuefile_extension(queuefile_extension)
diff --git a/ycdl/ycdldb.py b/ycdl/ycdldb.py
index 9c8a51b..4462da2 100644
--- a/ycdl/ycdldb.py
+++ b/ycdl/ycdldb.py
@@ -135,9 +135,7 @@ class YCDLDBChannelMixin:
         if name is None:
             name = self.youtube.get_user_name(channel_id)
 
-        if download_directory is not None:
-            download_directory = pathclass.Path(download_directory).absolute_path
-
+        download_directory = objects.Channel.normalize_download_directory(download_directory)
         queuefile_extension = objects.Channel.normalize_queuefile_extension(queuefile_extension)
 
         self.log.info('Adding channel %s %s', channel_id, name)
@@ -146,7 +144,7 @@ class YCDLDBChannelMixin:
             'id': channel_id,
             'name': name,
             'uploads_playlist': self.youtube.get_user_uploads_playlist_id(channel_id),
-            'download_directory': download_directory,
+            'download_directory': download_directory.absolute_path if download_directory else None,
             'queuefile_extension': queuefile_extension,
             'automark': "pending",
         }