diff --git a/code/datums/keybindings/client.dm b/code/datums/keybindings/client.dm
index 23a89404931..ac39a724cef 100644
--- a/code/datums/keybindings/client.dm
+++ b/code/datums/keybindings/client.dm
@@ -9,6 +9,14 @@
 	. = ..()
 	C.adminhelp()
 
+/datum/keybinding/client/toggle_fullscreen
+	name ="Toggle Fullscreen"
+	keys = list("F11")
+
+/datum/keybinding/client/toggle_fullscreen/down(client/C)
+	. = ..()
+	C.toggle_fullscreen()
+
 /datum/keybinding/client/toggle_min_hud
 	name = "Toggle Minimal HUD"
 	keys = list("F12")
diff --git a/code/modules/client/client_defines.dm b/code/modules/client/client_defines.dm
index d47f82b5e02..1f724e7386a 100644
--- a/code/modules/client/client_defines.dm
+++ b/code/modules/client/client_defines.dm
@@ -225,6 +225,9 @@
 	/// Our object window datum. It stores info about and handles behavior for the object tab
 	var/datum/object_window_info/obj_window
 
+	/// The current fullscreen state for /client/toggle_fullscreen()
+	var/fullscreen = FALSE
+
 /client/vv_edit_var(var_name, var_value)
 	switch(var_name)
 		// I know we will never be in a world where admins are editing client vars to let people bypass TOS
diff --git a/code/modules/client/client_procs.dm b/code/modules/client/client_procs.dm
index 73c0d726df4..02145bca38e 100644
--- a/code/modules/client/client_procs.dm
+++ b/code/modules/client/client_procs.dm
@@ -1270,6 +1270,31 @@
 				class = "unknown"
 			debug_variables(stat_item)
 			message_admins("Admin [key_name_admin(usr)] is debugging the [stat_item] [class].")
+/**
+*	Handles fullscreen on the client.
+*/
+/client/verb/toggle_fullscreen()
+	set name = "Toggle Fullscreen"
+	set category = "OOC"
+
+	fullscreen = !fullscreen
+
+	if(fullscreen)
+		winset(usr, "mainwindow", "titlebar=false")
+		winset(usr, "mainwindow", "can-resize=false")
+		winset(usr, "mainwindow", "is-maximized=false")  // Ensures the window doesn't get stretched oddly.
+		winset(usr, "mainwindow", "is-maximized=true")
+		winset(usr, "mainwindow", "is-fullscreen=true")
+		winset(usr, "mainwindow", "menu=")				 // Top-Menu bar [DISABLED]
+	else
+		winset(usr, "mainwindow", "titlebar=true")
+		winset(usr, "mainwindow", "can-resize=true")
+		winset(usr, "mainwindow", "is-fullscreen=false") // Order matters. Fullscreen [OFF] -> Maximize [TRUE]
+		winset(usr, "mainwindow", "is-maximized=true")
+		winset(usr, "mainwindow", "menu=menu")
+	var/fullscreen_state = fullscreen ? "on" : "off"
+	to_chat(usr, "Toggled fullscreen [fullscreen_state]. To Toggle fullscreen; Go to the tab OOC -> Toggle fullscreen or press F11")
+	fit_viewport()
 
 /client/proc/try_open_reagent_editor(atom/target)
 	var/target_UID = target.UID()