diff --git a/src/components/syncPlay/core/PlaybackCore.js b/src/components/syncPlay/core/PlaybackCore.js
index a47872e9c..91eb71c09 100644
--- a/src/components/syncPlay/core/PlaybackCore.js
+++ b/src/components/syncPlay/core/PlaybackCore.js
@@ -5,7 +5,7 @@
 import { Events } from 'jellyfin-apiclient';
 
 import browser from '../../../scripts/browser';
-import { toBoolean, toFloat } from '../../../scripts/stringUtils';
+import { toBoolean, toFloat } from '../../../utils/string.ts';
 import * as Helper from './Helper';
 import { getSetting } from './Settings';
 
diff --git a/src/components/syncPlay/core/timeSync/TimeSyncCore.js b/src/components/syncPlay/core/timeSync/TimeSyncCore.js
index 772121dac..cf9d6f09d 100644
--- a/src/components/syncPlay/core/timeSync/TimeSyncCore.js
+++ b/src/components/syncPlay/core/timeSync/TimeSyncCore.js
@@ -5,7 +5,7 @@
 
 import { Events } from 'jellyfin-apiclient';
 import appSettings from '../../../../scripts/settings/appSettings';
-import { toFloat } from '../../../../scripts/stringUtils';
+import { toFloat } from '../../../../utils/string.ts';
 import { getSetting } from '../Settings';
 import TimeSyncServer from './TimeSyncServer';
 
diff --git a/src/scripts/stringUtils.js b/src/utils/string.ts
similarity index 75%
rename from src/scripts/stringUtils.js
rename to src/utils/string.ts
index 0fcb8a289..301f4c44a 100644
--- a/src/scripts/stringUtils.js
+++ b/src/utils/string.ts
@@ -4,7 +4,7 @@
  * @param {boolean} defaultValue The default value if the string is invalid.
  * @returns {boolean} The value.
  */
-export function toBoolean(value, defaultValue = false) {
+export function toBoolean(value: string | undefined | null, defaultValue = false) {
     if (value !== 'true' && value !== 'false') {
         return defaultValue;
     } else {
@@ -18,8 +18,8 @@ export function toBoolean(value, defaultValue = false) {
  * @param {number} defaultValue The default value if the string is invalid.
  * @returns {number} The value.
  */
-export function toFloat(value, defaultValue = 0) {
-    if (value === null || value === '' || isNaN(value)) {
+export function toFloat(value: string | null | undefined, defaultValue = 0) {
+    if (!value || isNaN(value as never)) {
         return defaultValue;
     } else {
         return parseFloat(value);