diff --git a/src/openflexure_microscope_server/things/settings_manager.py b/src/openflexure_microscope_server/things/settings_manager.py
index 13592691..24ed8052 100644
--- a/src/openflexure_microscope_server/things/settings_manager.py
+++ b/src/openflexure_microscope_server/things/settings_manager.py
@@ -7,12 +7,21 @@ the server.
 """
 from collections.abc import Mapping
 from socket import gethostname
-from typing import Any, MutableMapping, Optional, Sequence
+from typing import Annotated, Any, MutableMapping, Optional, Sequence
 from uuid import UUID, uuid4
-from fastapi import HTTPException
+from fastapi import Depends, HTTPException, Request
 from labthings_fastapi.dependencies.metadata import GetThingStates
 from labthings_fastapi.thing import Thing
 from labthings_fastapi.decorators import thing_action, thing_property
+from labthings_fastapi.thing_server import find_thing_server, ThingServer
+from labthings_fastapi.dependencies.invocation import InvocationLogger
+
+
+def thing_server_from_request(request: Request) -> ThingServer:
+    return find_thing_server(request.app)
+
+
+ThingServerDep = Annotated[ThingServer, Depends(thing_server_from_request)]
 
 
 def recursive_update(old_dict: MutableMapping, update: Mapping):
@@ -122,4 +131,31 @@ class SettingsManager(Thing):
                 subdict[kl[-1]] = v
             except KeyError:
                 continue
-        return state
\ No newline at end of file
+        return state
+
+    @thing_action
+    def save_all_thing_settings(self, thing_server: ThingServerDep, logger: InvocationLogger) -> None:
+        """Ensure all the Things sync their settings to disk.
+
+        Normally, each Thing has a `thing_settings` attribute that can be
+        used to save settings. That dictionary is saved to a JSON file
+        when the server shuts down cleanly.
+
+        This action causes all the `thing_settings` dictionaries to be
+        saved to files immediately, meaning that settings will not be
+        lost in the event of a server crash, power outage, etc.
+        """
+        for name, thing in thing_server.things.items():
+            try:
+                if thing._labthings_thing_settings:
+                    thing._labthings_thing_settings.write_to_file()
+                    logger.info(f"Wrote {name} settings to disk.")
+            except PermissionError:
+                logger.warning(
+                    f"Could not write {name} settings to disk: permission error."
+                )
+            except FileNotFoundError:
+                logger.warning(
+                    f"Could not write {name} settings, folder not found"
+                )
+
diff --git a/webapp/src/components/tabContentComponents/settingsContent.vue b/webapp/src/components/tabContentComponents/settingsContent.vue
index d8ea2e05..3889ecfd 100644
--- a/webapp/src/components/tabContentComponents/settingsContent.vue
+++ b/webapp/src/components/tabContentComponents/settingsContent.vue
@@ -71,6 +71,11 @@
           </tabIcon>
         </li>
       </ul>
+      <task-submitter
+        :submit-url="saveAllThingSettingsUri"
+        submit-label="Save all settings"
+        class="uk-margin"
+      />
     </div>
     <div class="view-component uk-width-expand uk-padding-small">
       <tabContent
@@ -137,6 +142,7 @@ import stageSettings from "./settingsComponents/stageSettings.vue";
 // Import generic components
 import tabIcon from "../genericComponents/tabIcon";
 import tabContent from "../genericComponents/tabContent";
+import TaskSubmitter from '../genericComponents/taskSubmitter.vue';
 
 // Export main app
 export default {
@@ -150,7 +156,8 @@ export default {
     appSettings,
     featuresSettings,
     tabIcon,
-    tabContent
+    tabContent,
+    TaskSubmitter
   },
 
   data: function() {
@@ -160,6 +167,12 @@ export default {
     };
   },
 
+  computed: {
+    saveAllThingSettingsUri() {
+      return this.thingActionUrl("settings", "save_all_thing_settings");
+    }
+  },
+
   methods: {
     setTab: function(event, tab) {
       if (!(this.currentTab == tab)) {