diff --git a/File.zig b/File.zig
index d826958f36445c13569cf5cb7ef1e9943fb4fc11..216b2c5252291c297a083a4ec045067cf1e5e655 100644
--- a/File.zig
+++ b/File.zig
@@ -170,3 +170,16 @@ pub const Kind = enum {
     unix_socket,
     unknown,
 };
+
+/// Maps file content into memory with a single syscall.
+/// If length is null it will also call stat.
+pub fn mmap(self: File) ![]const u8 {
+    return sys.mmap(
+        null,
+        (try self.stat()).size,
+        sys.PROT.READ,
+        sys.MAP.PRIVATE,
+        @intFromEnum(self.fd),
+        0,
+    );
+}
diff --git a/nfs.zig b/nfs.zig
index 3c18dff389718e9075dd57bc2c0ee77881533e67..7447f5932affa2abe758c2e8534d43bdf1c9cdc6 100644
--- a/nfs.zig
+++ b/nfs.zig
@@ -36,3 +36,9 @@ pub fn stderr() File {
 pub fn memfd_create(name: [*:0]const u8, flags: c_uint) !File {
     return .{ .fd = @enumFromInt(try sys.memfd_create(name, flags)) };
 }
+
+/// Free a region of memory allocated with mmap.
+/// Any error calling munmap is ignored.
+pub fn munmap(region: []const u8) void {
+    return sys.munmap(region.ptr, region.len) catch {};
+}