diff --git a/common/quiche_text_utils.h b/common/quiche_text_utils.h
new file mode 100644
index 0000000..c99d9e2
--- /dev/null
+++ b/common/quiche_text_utils.h
@@ -0,0 +1,60 @@
+// Copyright 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_COMMON_QUICHE_TEXT_UTILS_H_
+#define QUICHE_COMMON_QUICHE_TEXT_UTILS_H_
+
+#include <string>
+
+#include "absl/strings/ascii.h"
+#include "absl/strings/escaping.h"
+#include "absl/strings/string_view.h"
+#include "absl/types/optional.h"
+#include "common/platform/api/quiche_export.h"
+
+namespace quiche {
+
+// Various utilities for manipulating text.
+class QUICHE_EXPORT QuicheTextUtils {
+ public:
+  // Returns a new string in which |data| has been converted to lower case.
+  static std::string ToLower(absl::string_view data) {
+    return absl::AsciiStrToLower(data);
+  }
+
+  // Removes leading and trailing whitespace from |data|.
+  static void RemoveLeadingAndTrailingWhitespace(absl::string_view* data) {
+    *data = absl::StripAsciiWhitespace(*data);
+  }
+
+  // Base64 encodes with no padding |data_len| bytes of |data| into |output|.
+  static void Base64Encode(const uint8_t* data,
+                           size_t data_len,
+                           std::string* output);
+
+  // Decodes a base64-encoded |input|.  Returns nullopt when the input is
+  // invalid.
+  static absl::optional<std::string> Base64Decode(absl::string_view input);
+
+  // Returns a string containing hex and ASCII representations of |binary|,
+  // side-by-side in the style of hexdump. Non-printable characters will be
+  // printed as '.' in the ASCII output.
+  // For example, given the input "Hello, QUIC!\01\02\03\04", returns:
+  // "0x0000:  4865 6c6c 6f2c 2051 5549 4321 0102 0304  Hello,.QUIC!...."
+  static std::string HexDump(absl::string_view binary_data);
+
+  // Returns true if |data| contains any uppercase characters.
+  static bool ContainsUpperCase(absl::string_view data) {
+    return std::any_of(data.begin(), data.end(), absl::ascii_isupper);
+  }
+
+  // Returns true if |data| contains only decimal digits.
+  static bool IsAllDigits(absl::string_view data) {
+    return std::all_of(data.begin(), data.end(), absl::ascii_isdigit);
+  }
+};
+
+}  // namespace quiche
+
+#endif  // QUICHE_COMMON_QUICHE_TEXT_UTILS_H_