Centered Shift Lock Universal

1local UserInputService = game:GetService("UserInputService")
2local RunService = game:GetService("RunService")
3local Players = game:GetService("Players")
4
5local player = Players.LocalPlayer
6local mouse = player:GetMouse()
7local camera = workspace.CurrentCamera
8local isLocked = false
9
10-- Settings
11local SHIFT_LOCK_ICON = "rbxasset://textures/MouseLockedCursor.png"
12local DEFAULT_ICON = ""
13local TOGGLE_KEY = Enum.KeyCode.CapsLock -- Keybind set to Caps Lock
14
15local function toggleShiftLock()
16    isLocked = not isLocked
17    
18    if isLocked then
19        -- ENABLE: Shows lock icon and forces the mouse to the exact center
20        mouse.Icon = SHIFT_LOCK_ICON
21        
22        RunService:BindToRenderStep("ForceCentralLock", Enum.RenderPriority.Last.Value, function()
23            local character = player.Character
24            if character and character:FindFirstChild("HumanoidRootPart") and character:FindFirstChild("Humanoid") then
25                -- Forces the mouse to the center of the screen
26                UserInputService.MouseBehavior = Enum.MouseBehavior.LockCenter
27                
28                -- Aligns the character with the camera (no side offset)
29                local _, y = camera.CFrame.Rotation:ToEulerAnglesYXZ()
30                character.HumanoidRootPart.CFrame =
31                    CFrame.new(character.HumanoidRootPart.Position) * CFrame.Angles(0, y, 0)
32                
33                -- Removes Roblox's default shoulder camera offset
34                character.Humanoid.CameraOffset = Vector3.new(0, 0, 0)
35                character.Humanoid.AutoRotate = false
36            end
37        end)
38    else
39        -- DISABLE: Releases the mouse and restores default behavior
40        RunService:UnbindFromRenderStep("ForceCentralLock")
41        UserInputService.MouseBehavior = Enum.MouseBehavior.Default
42        mouse.Icon = DEFAULT_ICON
43        
44        local character = player.Character
45        if character and character:FindFirstChild("Humanoid") then
46            character.Humanoid.AutoRotate = true
47            character.Humanoid.CameraOffset = Vector3.new(0, 0, 0)
48        end
49    end
50end
51
52-- Detects when Caps Lock (or a side button mapped to Caps Lock) is pressed
53UserInputService.InputBegan:Connect(function(input, gameProcessed)
54    if gameProcessed then return end
55    if input.KeyCode == TOGGLE_KEY then
56        toggleShiftLock()
57    end
58end)