diff --git a/build_web.sh b/build_web.sh
new file mode 100755
index 0000000..36507f9
--- /dev/null
+++ b/build_web.sh
@@ -0,0 +1,38 @@
+#!/bin/bash -eu
+
+# Point this to where you installed emscripten. Optional on systems that already
+# have `emcc` in the path.
+EMSCRIPTEN_SDK_DIR="$HOME/Probe/emsdk"
+OUT_DIR="build/web"
+
+mkdir -p $OUT_DIR
+
+export EMSDK_QUIET=1
+[[ -f "$EMSCRIPTEN_SDK_DIR/emsdk_env.sh" ]] && . "$EMSCRIPTEN_SDK_DIR/emsdk_env.sh"
+
+# Note RAYLIB_WASM_LIB=env.o -- env.o is an internal WASM object file. You can
+# see how RAYLIB_WASM_LIB is used inside <odin>/vendor/raylib/raylib.odin.
+#
+# The emcc call will be fed the actual raylib library file. That stuff will end
+# up in env.o
+#
+# Note that there is a rayGUI equivalent: -define:RAYGUI_WASM_LIB=env.o
+# odin build src/main_web -target:js_wasm32 -build-mode:obj -define:RAYLIB_WASM_LIB=env.o -define:RAYGUI_WASM_LIB=env.o -vet -strict-style -out:$OUT_DIR/game.wasm.o
+odin build src/main_web -target:js_wasm32 -build-mode:obj -define:RAYLIB_WASM_LIB=env.o -define:RAYGUI_WASM_LIB=env.o -out:$OUT_DIR/game.wasm.o
+
+ODIN_PATH=$(odin root)
+
+cp $ODIN_PATH/core/sys/wasm/js/odin.js $OUT_DIR
+
+files="$OUT_DIR/game.wasm.o ${ODIN_PATH}/vendor/raylib/wasm/libraylib.a ${ODIN_PATH}/vendor/raylib/wasm/libraygui.a"
+
+# index_template.html contains the javascript code that calls the procedures in
+# src/main_web/main_web.odin
+flags="-sEXPORTED_RUNTIME_METHODS=['HEAPF32'] -sSTACK_SIZE=524288  -sUSE_GLFW=3 -sWASM_BIGINT -sWARN_ON_UNDEFINED_SYMBOLS=0 -sASSERTIONS --shell-file src/main_web/index_template.html --preload-file assets"
+
+# For debugging: Add `-g` to `emcc` (gives better error callstack in chrome)
+emcc -o $OUT_DIR/index.html $files $flags
+
+rm $OUT_DIR/game.wasm.o
+
+echo "Web build created in ${OUT_DIR}"
diff --git a/src/main_web/index_template.html b/src/main_web/index_template.html
index 39579c5..1c61e7f 100644
--- a/src/main_web/index_template.html
+++ b/src/main_web/index_template.html
@@ -10,13 +10,14 @@
 	<meta name="viewport" content="width=device-width">
 
 	<style>
-		body { 
-			margin: 0px; 
-			overflow: hidden; 
+		body {
+			margin: 0px;
+			overflow: hidden;
 			background-color: black;
 		}
-		canvas.game_canvas { 
-			border: 0px none; 
+		canvas.game_canvas {
+			max-width: 1550px;
+			border: 0px none;
 			background-color: black;
 			padding-left: 0;
 			padding-right: 0;
diff --git a/src/main_web/main_web.odin b/src/main_web/main_web.odin
index 047a4aa..d5605e3 100644
--- a/src/main_web/main_web.odin
+++ b/src/main_web/main_web.odin
@@ -63,6 +63,4 @@ main_end :: proc "c" () {
 @export
 web_window_size_changed :: proc "c" (w: c.int, h: c.int) {
 	context = web_context
-	// TODO
-	game.parent_window_size_changed(int(w), int(h))
 }