diff --git a/Manager.App/Components/Application/Dev/AuthenticationHasher.razor b/Manager.App/Components/Application/Dev/AuthenticationHasher.razor
new file mode 100644
index 0000000..3f91c43
--- /dev/null
+++ b/Manager.App/Components/Application/Dev/AuthenticationHasher.razor
@@ -0,0 +1,14 @@
+
+
+<MudText>SAPISID Hash generator</MudText>
+<MudStack Row Spacing="2">
+    <MudTextField HelperText="Datasync id" @bind-Value="@DatasyncId"/>
+    <MudTextField HelperText="Time" Mask="@(new PatternMask("0000000000"))" @bind-Value="@Time"/>
+    <MudTextField HelperText="SAPISID" @bind-Value="@SecureCookie"/>
+    <MudTextField HelperText="Origin" @bind-Value="@Origin"/>
+</MudStack>
+<MudTextField HelperText="Hash" ReadOnly @bind-Value="@OutputHash"/>
+<MudStack Row Spacing="2">
+    <MudButton OnClick="Hash">Generate</MudButton>
+    <MudButton OnClick="Clear">Clear</MudButton>
+</MudStack>
\ No newline at end of file
diff --git a/Manager.App/Components/Application/Dev/AuthenticationHasher.razor.cs b/Manager.App/Components/Application/Dev/AuthenticationHasher.razor.cs
new file mode 100644
index 0000000..2ef14fb
--- /dev/null
+++ b/Manager.App/Components/Application/Dev/AuthenticationHasher.razor.cs
@@ -0,0 +1,30 @@
+using Manager.YouTube.Util;
+using Microsoft.AspNetCore.Components;
+
+namespace Manager.App.Components.Application.Dev;
+
+public partial class AuthenticationHasher : ComponentBase
+{
+    private const string DefaultOrigin = "https://www.youtube.com";
+    public string DatasyncId { get; set; } = "";
+    public string Time { get; set; } = "";
+    public string SecureCookie { get; set; } = "";
+    public string Origin { get; set; } = DefaultOrigin;
+
+    public string OutputHash { get; set; } = "";
+
+    private void Clear()
+    {
+        DatasyncId = "";
+        Time = "";
+        SecureCookie = "";
+        Origin = DefaultOrigin;
+        OutputHash = "";
+    }
+
+    private void Hash()
+    {
+        var hashedValue= AuthenticationUtilities.GetSapisidHash(DatasyncId, SecureCookie, Origin, Time);
+        OutputHash = hashedValue ?? "Hash failed!";
+    }
+}
\ No newline at end of file
diff --git a/Manager.App/Components/Layout/NavMenu.razor b/Manager.App/Components/Layout/NavMenu.razor
index a611661..8205a2d 100644
--- a/Manager.App/Components/Layout/NavMenu.razor
+++ b/Manager.App/Components/Layout/NavMenu.razor
@@ -4,4 +4,5 @@
     <MudNavLink Href="/Channels" Icon="@Icons.Material.Filled.SupervisorAccount" Match="NavLinkMatch.All">Channels</MudNavLink>
     <MudNavLink Href="/Library" Icon="@Icons.Material.Filled.LocalLibrary" Match="NavLinkMatch.All">Library</MudNavLink>
     <MudNavLink Href="/Playlists" Icon="@Icons.Material.Filled.ViewList" Match="NavLinkMatch.All">Playlists</MudNavLink>
+    <MudNavLink Href="/Development" Icon="@Icons.Material.Filled.DeveloperMode" Match="NavLinkMatch.All">Development</MudNavLink>
 </MudNavMenu>
\ No newline at end of file
diff --git a/Manager.App/Components/Pages/Development.razor b/Manager.App/Components/Pages/Development.razor
new file mode 100644
index 0000000..668ff32
--- /dev/null
+++ b/Manager.App/Components/Pages/Development.razor
@@ -0,0 +1,9 @@
+@page "/Development"
+@using Manager.App.Components.Application.Dev
+<title>Development page</title>
+
+<MudTabs Outlined Position="Position.Left" PanelClass="pa-4" ApplyEffectsToContainer Style="height: 100%">
+    <MudTabPanel Text="Authentication">
+        <AuthenticationHasher />
+    </MudTabPanel>
+</MudTabs>
\ No newline at end of file
diff --git a/Manager.App/Components/Pages/Development.razor.cs b/Manager.App/Components/Pages/Development.razor.cs
new file mode 100644
index 0000000..2455b75
--- /dev/null
+++ b/Manager.App/Components/Pages/Development.razor.cs
@@ -0,0 +1,8 @@
+using Microsoft.AspNetCore.Components;
+
+namespace Manager.App.Components.Pages;
+
+public partial class Development : ComponentBase
+{
+    
+}
\ No newline at end of file
diff --git a/Manager.YouTube/Util/AuthenticationUtilities.cs b/Manager.YouTube/Util/AuthenticationUtilities.cs
index a0ee689..7df18a3 100644
--- a/Manager.YouTube/Util/AuthenticationUtilities.cs
+++ b/Manager.YouTube/Util/AuthenticationUtilities.cs
@@ -16,13 +16,16 @@ public static class AuthenticationUtilities
         return new AuthenticationHeaderValue(HeaderScheme, strHash);
     }
 
-    public static string? GetSapisidHash(string datasyncId, string sapisid, string origin)
+    public static string? GetSapisidHash(string datasyncId, string sapisid, string origin, string? time = null)
     {
         if (string.IsNullOrWhiteSpace(datasyncId) || string.IsNullOrWhiteSpace(sapisid) || string.IsNullOrWhiteSpace(origin))
             return null;
         datasyncId = datasyncId.Replace("||", "");
         sapisid = Uri.UnescapeDataString(sapisid);
-        var time = GetTime();
+        if (string.IsNullOrWhiteSpace(time))
+        {
+            time = GetTime();
+        }
         var sha1 = HashString($"{datasyncId} {time} {sapisid} {origin}");
         var completeHash = $"{time}_{sha1}_u";
         return completeHash;