diff --git a/quic/core/chlo_extractor.h b/quic/core/chlo_extractor.h
new file mode 100644
index 0000000..4e53a10
--- /dev/null
+++ b/quic/core/chlo_extractor.h
@@ -0,0 +1,45 @@
+// Copyright (c) 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef QUICHE_QUIC_CORE_CHLO_EXTRACTOR_H_
+#define QUICHE_QUIC_CORE_CHLO_EXTRACTOR_H_
+
+#include "net/third_party/quiche/src/quic/core/crypto/crypto_handshake_message.h"
+#include "net/third_party/quiche/src/quic/core/quic_packets.h"
+
+namespace quic {
+
+// A utility for extracting QUIC Client Hello messages from packets,
+// without needs to spin up a full QuicSession.
+class ChloExtractor {
+ public:
+  class Delegate {
+   public:
+    virtual ~Delegate() {}
+
+    // Called when a CHLO message is found in the packets.
+    virtual void OnChlo(QuicTransportVersion version,
+                        QuicConnectionId connection_id,
+                        const CryptoHandshakeMessage& chlo) = 0;
+  };
+
+  // Extracts a CHLO message from |packet| and invokes the OnChlo
+  // method of |delegate|. Return true if a CHLO message was found,
+  // and false otherwise. If non-empty,
+  // |create_session_tag_indicators| contains a list of QUIC tags that
+  // if found will result in the session being created early, to
+  // enable support for multi-packet CHLOs.
+  static bool Extract(const QuicEncryptedPacket& packet,
+                      const ParsedQuicVersionVector& versions,
+                      const QuicTagVector& create_session_tag_indicators,
+                      Delegate* delegate,
+                      uint8_t connection_id_length);
+
+  ChloExtractor(const ChloExtractor&) = delete;
+  ChloExtractor operator=(const ChloExtractor&) = delete;
+};
+
+}  // namespace quic
+
+#endif  // QUICHE_QUIC_CORE_CHLO_EXTRACTOR_H_