diff --git a/static/js/utils.js b/static/js/utils.js
index 11ebc81..e684ab8 100644
--- a/static/js/utils.js
+++ b/static/js/utils.js
@@ -16,3 +16,13 @@ function loadTemplateAsync(path) {
 
   return result
 }
+
+async function hash(string) {
+  const utf8 = new TextEncoder().encode(string)
+  const hashBuffer = await crypto.subtle.digest('SHA-256', utf8)
+  const hashArray = Array.from(new Uint8Array(hashBuffer))
+  const hashHex = hashArray
+    .map(bytes => bytes.toString(16).padStart(2, '0'))
+    .join('')
+  return hashHex
+}