diff --git a/src/file.js.c b/src/file.js.c
index 984859a1..ff77c0e3 100644
--- a/src/file.js.c
+++ b/src/file.js.c
@@ -21,6 +21,7 @@ static JSValue _file_read_file(JSContext* context, JSValueConst this_val, int ar
 static JSValue _file_read_file_zip(JSContext* context, JSValueConst this_val, int argc, JSValueConst* argv);
 static JSValue _file_stat(JSContext* context, JSValueConst this_val, int argc, JSValueConst* argv);
 static JSValue _file_stat_zip(JSContext* context, JSValueConst this_val, int argc, JSValueConst* argv);
+static JSValue _file_write_file(JSContext* context, JSValueConst this_val, int argc, JSValueConst* argv);
 
 static double _time_spec_to_double(const uv_timespec_t* time_spec);
 static void _file_on_stat_complete(uv_fs_t* request);
@@ -47,6 +48,7 @@ void tf_file_register(JSContext* context)
 	const char* zip = tf_task_get_zip_path(task);
 	JS_SetPropertyStr(context, global, "File", file);
 	JS_SetPropertyStr(context, file, "readFile", JS_NewCFunction(context, zip ? _file_read_file_zip : _file_read_file, "readFile", 1));
+	JS_SetPropertyStr(context, file, "writeFile", JS_NewCFunction(context, _file_write_file, "writeFile", 2));
 	JS_SetPropertyStr(context, file, "stat", JS_NewCFunction(context, zip ? _file_stat_zip : _file_stat, "stat", 1));
 	JS_FreeValue(context, global);
 }
@@ -59,6 +61,103 @@ static void _file_async_close_callback(uv_fs_t* req)
 	tf_free(req);
 }
 
+static void _file_write_write_callback(uv_fs_t* req)
+{
+	uv_fs_req_cleanup(req);
+	fs_req_t* fsreq = (fs_req_t*)req;
+	tf_task_t* task = req->loop->data;
+	JSContext* context = tf_task_get_context(task);
+	promiseid_t promise = (promiseid_t)(intptr_t)req->data;
+	if (req->result >= 0)
+	{
+		tf_task_resolve_promise(task, promise, JS_NewInt64(context, req->result));
+	}
+	else
+	{
+		tf_task_reject_promise(task, promise, JS_ThrowInternalError(context, "%s", uv_strerror(req->result)));
+	}
+	int result = uv_fs_close(req->loop, req, fsreq->file, _file_async_close_callback);
+	if (result < 0)
+	{
+		uv_fs_req_cleanup(req);
+		tf_free(fsreq);
+	}
+}
+
+static void _file_write_open_callback(uv_fs_t* req)
+{
+	fs_req_t* fsreq = (fs_req_t*)req;
+	uv_fs_req_cleanup(req);
+	tf_task_t* task = req->loop->data;
+	JSContext* context = tf_task_get_context(task);
+	promiseid_t promise = (promiseid_t)(intptr_t)req->data;
+	if (req->result >= 0)
+	{
+		uv_buf_t buf = { .base = fsreq->buffer, .len = fsreq->size };
+		fsreq->file = req->result;
+		int result = uv_fs_write(req->loop, req, fsreq->file, &buf, 1, 0, _file_write_write_callback);
+		if (result < 0)
+		{
+			tf_task_reject_promise(task, promise, JS_ThrowInternalError(context, "%s", uv_strerror(result)));
+			result = uv_fs_close(req->loop, req, fsreq->file, _file_async_close_callback);
+			if (result < 0)
+			{
+				uv_fs_req_cleanup(req);
+				tf_free(fsreq);
+			}
+		}
+	}
+	else
+	{
+		tf_task_reject_promise(task, promise, JS_ThrowInternalError(context, "%s", uv_strerror(req->result)));
+		uv_fs_req_cleanup(req);
+		tf_free(req);
+	}
+}
+
+static JSValue _file_write_file(JSContext* context, JSValueConst this_val, int argc, JSValueConst* argv)
+{
+	void* task = JS_GetContextOpaque(context);
+	const char* file_name = JS_ToCString(context, argv[0]);
+
+	size_t size;
+	uint8_t* buffer = tf_util_try_get_array_buffer(context, &size, argv[1]);
+	bool is_array_buffer = false;
+	if (buffer)
+	{
+		is_array_buffer = true;
+	}
+	else
+	{
+		buffer = (uint8_t*)JS_ToCStringLen(context, &size, argv[1]);
+	}
+
+	promiseid_t promise = -1;
+	JSValue promise_value = tf_task_allocate_promise(task, &promise);
+	fs_req_t* req = tf_malloc(sizeof(fs_req_t) + size);
+	*req = (fs_req_t)
+	{
+		.fs =
+		{
+			.data = (void*)(intptr_t)promise,
+		},
+		.size = size,
+	};
+	memcpy(req->buffer, buffer, size);
+	if (!is_array_buffer)
+	{
+		JS_FreeCString(context, (const char*)buffer);
+	}
+
+	int result = uv_fs_open(tf_task_get_loop(task), &req->fs, file_name, UV_FS_O_CREAT | UV_FS_O_WRONLY, 0644, _file_write_open_callback);
+	if (result < 0)
+	{
+		tf_task_reject_promise(task, promise, JS_ThrowInternalError(context, "%s", uv_strerror(result)));
+	}
+	JS_FreeCString(context, file_name);
+	return promise_value;
+}
+
 static void _file_read_read_callback(uv_fs_t* req)
 {
 	uv_fs_req_cleanup(req);