diff --git a/lib/serialization/base64UrlSpec.ts b/lib/serialization/base64UrlSpec.ts
new file mode 100644
index 0000000..dbdf91e
--- /dev/null
+++ b/lib/serialization/base64UrlSpec.ts
@@ -0,0 +1,27 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+import { TypeSpec, createValidationErrorMessage } from "./typeSpec";
+
+/**
+ * A type specification that describes how to validate and serialize a Base64Url encoded ByteArray.
+ */
+const byteArraySpec: TypeSpec<string> = {
+  typeName: "Base64Url",
+
+  serialize(propertyPath: string[], value: any): string {
+    if (!value || typeof value.constructor.isBuffer !== "function" || !value.constructor.isBuffer(value)) {
+      throw new Error(createValidationErrorMessage(propertyPath, value, "a Buffer"));
+    }
+
+    const result: string = value.toString("base64");
+
+    let trimmedResultLength = result.length;
+    while ((trimmedResultLength - 1) >= 0 && result[trimmedResultLength - 1] === "=") {
+      --trimmedResultLength;
+    }
+
+    return result.substr(0, trimmedResultLength).replace(/\+/g, "-").replace(/\//g, "_");
+  }
+};
+
+export default byteArraySpec;
\ No newline at end of file
diff --git a/lib/serialization/byteArraySpec.ts b/lib/serialization/byteArraySpec.ts
index 47a13e8..40c078c 100644
--- a/lib/serialization/byteArraySpec.ts
+++ b/lib/serialization/byteArraySpec.ts
@@ -6,14 +6,14 @@ import { TypeSpec, createValidationErrorMessage } from "./typeSpec";
  * A type specification that describes how to validate and serialize a ByteArray.
  */
 const byteArraySpec: TypeSpec<string> = {
-    typeName: "ByteArray(Buffer)",
+  typeName: "ByteArray",
 
-    serialize(propertyPath: string[], value: any): string {
-        if (!value || typeof value.constructor.isBuffer !== "function" || !value.constructor.isBuffer(value)) {
-            throw new Error(createValidationErrorMessage(propertyPath, value, "a ByteArray(Buffer)"));
-        }
-        return value.toString("base64");
+  serialize(propertyPath: string[], value: any): string {
+    if (!value || typeof value.constructor.isBuffer !== "function" || !value.constructor.isBuffer(value)) {
+      throw new Error(createValidationErrorMessage(propertyPath, value, "a Buffer"));
     }
+    return value.toString("base64");
+  }
 };
 
 export default byteArraySpec;
\ No newline at end of file
diff --git a/lib/serialization/dateSpec.ts b/lib/serialization/dateSpec.ts
index 6241fbf..447982a 100644
--- a/lib/serialization/dateSpec.ts
+++ b/lib/serialization/dateSpec.ts
@@ -6,14 +6,14 @@ import { TypeSpec, createValidationErrorMessage } from "./typeSpec";
  * A type specification that describes how to validate and serialize a Date.
  */
 const dateSpec: TypeSpec<string> = {
-    typeName: "Date",
+  typeName: "Date",
 
-    serialize(propertyPath: string[], value: any): string {
-        if (!value || (!(value instanceof Date) && (typeof value !== "string" || isNaN(Date.parse(value))))) {
-            throw new Error(createValidationErrorMessage(propertyPath, value, `an instanceof Date or a string in ISO8601 format`));
-        }
-        return (value instanceof Date ? value : new Date(value)).toISOString().substring(0, 10);
+  serialize(propertyPath: string[], value: any): string {
+    if (!value || (!(value instanceof Date) && (typeof value !== "string" || isNaN(Date.parse(value))))) {
+      throw new Error(createValidationErrorMessage(propertyPath, value, `an instanceof Date or a string in ISO8601 format`));
     }
+    return (value instanceof Date ? value : new Date(value)).toISOString().substring(0, 10);
+  }
 };
 
 export default dateSpec;
\ No newline at end of file
diff --git a/lib/serialization/dateTimeRfc1123Spec.ts b/lib/serialization/dateTimeRfc1123Spec.ts
index 3a34bdf..a968d63 100644
--- a/lib/serialization/dateTimeRfc1123Spec.ts
+++ b/lib/serialization/dateTimeRfc1123Spec.ts
@@ -6,14 +6,14 @@ import { TypeSpec, createValidationErrorMessage } from "./typeSpec";
  * A type specification that describes how to validate and serialize a Date.
  */
 const dateTimeRfc1123Spec: TypeSpec<string> = {
-    typeName: "DateTimeRFC1123",
+  typeName: "DateTimeRFC1123",
 
-    serialize(propertyPath: string[], value: any): string {
-        if (!value || (!(value instanceof Date) && (typeof value !== "string" || isNaN(Date.parse(value))))) {
-            throw new Error(createValidationErrorMessage(propertyPath, value, `an instanceof Date or a string in ISO8601 format`));
-        }
-        return (value instanceof Date ? value : new Date(value)).toUTCString();
+  serialize(propertyPath: string[], value: any): string {
+    if (!value || (!(value instanceof Date) && (typeof value !== "string" || isNaN(Date.parse(value))))) {
+      throw new Error(createValidationErrorMessage(propertyPath, value, `an instanceof Date or a string in ISO8601 format`));
     }
+    return (value instanceof Date ? value : new Date(value)).toUTCString();
+  }
 };
 
 export default dateTimeRfc1123Spec;
\ No newline at end of file
diff --git a/lib/serialization/dateTimeSpec.ts b/lib/serialization/dateTimeSpec.ts
index d1671cc..74f40e5 100644
--- a/lib/serialization/dateTimeSpec.ts
+++ b/lib/serialization/dateTimeSpec.ts
@@ -6,14 +6,14 @@ import { TypeSpec, createValidationErrorMessage } from "./typeSpec";
  * A type specification that describes how to validate and serialize a Date.
  */
 const dateTimeSpec: TypeSpec<string> = {
-    typeName: "DateTime",
+  typeName: "DateTime",
 
-    serialize(propertyPath: string[], value: any): string {
-        if (!value || (!(value instanceof Date) && (typeof value !== "string" || isNaN(Date.parse(value))))) {
-            throw new Error(createValidationErrorMessage(propertyPath, value, `an instanceof Date or a string in ISO8601 format`));
-        }
-        return (value instanceof Date ? value : new Date(value)).toISOString();
+  serialize(propertyPath: string[], value: any): string {
+    if (!value || (!(value instanceof Date) && (typeof value !== "string" || isNaN(Date.parse(value))))) {
+      throw new Error(createValidationErrorMessage(propertyPath, value, `an instanceof Date or a string in ISO8601 format`));
     }
+    return (value instanceof Date ? value : new Date(value)).toISOString();
+  }
 };
 
 export default dateTimeSpec;
\ No newline at end of file
diff --git a/lib/serialization/numberSpec.ts b/lib/serialization/numberSpec.ts
index e7e05ea..8c4e3dd 100644
--- a/lib/serialization/numberSpec.ts
+++ b/lib/serialization/numberSpec.ts
@@ -6,14 +6,14 @@ import { TypeSpec, createValidationErrorMessage } from "./typeSpec";
  * A type specification that describes how to validate and serialize a number.
  */
 const numberSpec: TypeSpec<number> = {
-    typeName: "number",
+  typeName: "number",
 
-    serialize(propertyPath: string[], value: any): number {
-        if (typeof value !== "number") {
-            throw new Error(createValidationErrorMessage(propertyPath, value, "a number"));
-        }
-        return value;
+  serialize(propertyPath: string[], value: any): number {
+    if (typeof value !== "number") {
+      throw new Error(createValidationErrorMessage(propertyPath, value, "a number"));
     }
+    return value;
+  }
 };
 
 export default numberSpec;
\ No newline at end of file
diff --git a/lib/serialization/objectSpec.ts b/lib/serialization/objectSpec.ts
index 94b1c58..ce8a28e 100644
--- a/lib/serialization/objectSpec.ts
+++ b/lib/serialization/objectSpec.ts
@@ -6,14 +6,14 @@ import { TypeSpec, createValidationErrorMessage } from "./typeSpec";
  * A type specification that describes how to validate and serialize an object.
  */
 const objectSpec: TypeSpec<{}> = {
-    typeName: "object",
+  typeName: "object",
 
-    serialize(propertyPath: string[], value: any): {} {
-        if (typeof value !== "object" || Array.isArray(value)) {
-            throw new Error(createValidationErrorMessage(propertyPath, value, "an object"));
-        }
-        return value;
+  serialize(propertyPath: string[], value: any): {} {
+    if (typeof value !== "object" || Array.isArray(value)) {
+      throw new Error(createValidationErrorMessage(propertyPath, value, "an object"));
     }
+    return value;
+  }
 };
 
 export default objectSpec;
\ No newline at end of file
diff --git a/lib/serialization/streamSpec.ts b/lib/serialization/streamSpec.ts
index 64d8426..1fd5613 100644
--- a/lib/serialization/streamSpec.ts
+++ b/lib/serialization/streamSpec.ts
@@ -7,14 +7,14 @@ import { TypeSpec, createValidationErrorMessage } from "./typeSpec";
  * A type specification that describes how to validate and serialize a Stream.
  */
 const streamSpec: TypeSpec<any> = {
-    typeName: "Stream",
+  typeName: "Stream",
 
-    serialize(propertyPath: string[], value: any): any {
-        if (!isStream(value)) {
-            throw new Error(createValidationErrorMessage(propertyPath, value, "a Stream"));
-        }
-        return value;
+  serialize(propertyPath: string[], value: any): any {
+    if (!isStream(value)) {
+      throw new Error(createValidationErrorMessage(propertyPath, value, "a Stream"));
     }
+    return value;
+  }
 };
 
 export default streamSpec;
\ No newline at end of file
diff --git a/lib/serialization/stringSpec.ts b/lib/serialization/stringSpec.ts
index 9da44f3..9ee3bbe 100644
--- a/lib/serialization/stringSpec.ts
+++ b/lib/serialization/stringSpec.ts
@@ -6,14 +6,14 @@ import { TypeSpec, createValidationErrorMessage } from "./typeSpec";
  * A type specification that describes how to validate and serialize a string.
  */
 const stringSpec: TypeSpec<string> = {
-    typeName: "string",
+  typeName: "string",
 
-    serialize(propertyPath: string[], value: any): string {
-        if (typeof value !== "string") {
-            throw new Error(createValidationErrorMessage(propertyPath, value, "a string"));
-        }
-        return value;
+  serialize(propertyPath: string[], value: any): string {
+    if (typeof value !== "string") {
+      throw new Error(createValidationErrorMessage(propertyPath, value, "a string"));
     }
+    return value;
+  }
 };
 
 export default stringSpec;
\ No newline at end of file
diff --git a/lib/serialization/timeSpanSpec.ts b/lib/serialization/timeSpanSpec.ts
index 0a0f7a9..ceed075 100644
--- a/lib/serialization/timeSpanSpec.ts
+++ b/lib/serialization/timeSpanSpec.ts
@@ -7,14 +7,14 @@ import { isDuration } from "moment";
  * A type specification that describes how to validate and serialize a Date.
  */
 const timeSpanSpec: TypeSpec<string> = {
-    typeName: "TimeSpan",
+  typeName: "TimeSpan",
 
-    serialize(propertyPath: string[], value: any): string {
-        if (!value || (!isDuration(value) && !(value.constructor && value.constructor.name === "Duration" && typeof value.isValid === "function" && value.isValid()))) {
-            throw new Error(createValidationErrorMessage(propertyPath, value, `a TimeSpan/Duration`));
-        }
-        return value.toISOString();
+  serialize(propertyPath: string[], value: any): string {
+    if (!value || (!isDuration(value) && !(value.constructor && value.constructor.name === "Duration" && typeof value.isValid === "function" && value.isValid()))) {
+      throw new Error(createValidationErrorMessage(propertyPath, value, `a TimeSpan/Duration`));
     }
+    return value.toISOString();
+  }
 };
 
 export default timeSpanSpec;
\ No newline at end of file
diff --git a/lib/serialization/typeSpec.ts b/lib/serialization/typeSpec.ts
index 7fcf532..df6bd90 100644
--- a/lib/serialization/typeSpec.ts
+++ b/lib/serialization/typeSpec.ts
@@ -5,24 +5,24 @@
  * A type specification that describes how to validate and serialize an object of a given type.
  */
 export interface TypeSpec<TSerialized> {
-    /**
-     * The name of the type that this TypeSpec validates.
-     */
-    typeName: string;
+  /**
+   * The name of the type that this TypeSpec validates.
+   */
+  typeName: string;
 
-    /**
-     * The values that are allowed for this TypeSpec. If this is undefined, then all values of the
-     * correct type are valid.
-     */
-    allowedValues?: TSerialized[];
+  /**
+   * The values that are allowed for this TypeSpec. If this is undefined, then all values of the
+   * correct type are valid.
+   */
+  allowedValues?: TSerialized[];
 
-    /**
-     * Validate and serialize the provided value into the return type T.
-     * @param propertyPath The path from the root of the type being serialized down to this
-     * property.
-     * @param value The value to validate and serialize.
-     */
-    serialize(propertyPath: string[], value: any): TSerialized;
+  /**
+   * Validate and serialize the provided value into the return type T.
+   * @param propertyPath The path from the root of the type being serialized down to this
+   * property.
+   * @param value The value to validate and serialize.
+   */
+  serialize(propertyPath: string[], value: any): TSerialized;
 }
 
 /**
@@ -32,5 +32,5 @@ export interface TypeSpec<TSerialized> {
  * @param expectedConditionDescription A brief description of what type was expected.
  */
 export function createValidationErrorMessage(propertyPath: string[], value: any, expectedConditionDescription: string): string {
-    return `Property ${propertyPath.join(".")} with value ${JSON.stringify(value)} must be ${expectedConditionDescription}.`;
+  return `Property ${propertyPath.join(".")} with value ${JSON.stringify(value)} must be ${expectedConditionDescription}.`;
 }
\ No newline at end of file
diff --git a/lib/serialization/unixTimeSpec.ts b/lib/serialization/unixTimeSpec.ts
index 070c25e..4dd550d 100644
--- a/lib/serialization/unixTimeSpec.ts
+++ b/lib/serialization/unixTimeSpec.ts
@@ -6,15 +6,15 @@ import { TypeSpec, createValidationErrorMessage } from "./typeSpec";
  * A type specification that describes how to validate and serialize a Date.
  */
 const unixTimeSpec: TypeSpec<number> = {
-    typeName: "UnixTime",
+  typeName: "UnixTime",
 
-    serialize(propertyPath: string[], value: any): number {
-        if (!value || (!(value instanceof Date) && (typeof value !== "string" || isNaN(Date.parse(value))))) {
-            throw new Error(createValidationErrorMessage(propertyPath, value, `an instanceof Date or a string in ISO8601 format`));
-        }
-        const valueDate: Date = (value instanceof Date ? value : new Date(value));
-        return Math.floor(valueDate.getTime() / 1000);
+  serialize(propertyPath: string[], value: any): number {
+    if (!value || (!(value instanceof Date) && (typeof value !== "string" || isNaN(Date.parse(value))))) {
+      throw new Error(createValidationErrorMessage(propertyPath, value, `an instanceof Date or a string in ISO8601 format`));
     }
+    const valueDate: Date = (value instanceof Date ? value : new Date(value));
+    return Math.floor(valueDate.getTime() / 1000);
+  }
 };
 
 export default unixTimeSpec;
\ No newline at end of file
diff --git a/lib/serialization/uuidSpec.ts b/lib/serialization/uuidSpec.ts
index ecebc2f..0960222 100644
--- a/lib/serialization/uuidSpec.ts
+++ b/lib/serialization/uuidSpec.ts
@@ -7,14 +7,14 @@ import * as utils from "../util/utils";
  * A type specification that describes how to validate and serialize a UUID.
  */
 const uuidSpec: TypeSpec<string> = {
-    typeName: "UUID",
+  typeName: "UUID",
 
-    serialize(propertyPath: string[], value: any): string {
-        if (typeof value !== "string" || !utils.isValidUuid(value)) {
-            throw new Error(createValidationErrorMessage(propertyPath, value, "a UUID"));
-        }
-        return value;
+  serialize(propertyPath: string[], value: any): string {
+    if (typeof value !== "string" || !utils.isValidUuid(value)) {
+      throw new Error(createValidationErrorMessage(propertyPath, value, "a UUID"));
     }
+    return value;
+  }
 };
 
 export default uuidSpec;
\ No newline at end of file
diff --git a/test/serialization/base64UrlSpecTests.ts b/test/serialization/base64UrlSpecTests.ts
new file mode 100644
index 0000000..330d93b
--- /dev/null
+++ b/test/serialization/base64UrlSpecTests.ts
@@ -0,0 +1,43 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+import * as assert from "assert";
+import base64UrlSpec from "../../lib/serialization/base64UrlSpec";
+
+describe("base64UrlSpec", () => {
+  it("should have \"Base64Url\" for its typeName property", () => {
+    assert.strictEqual("Base64Url", base64UrlSpec.typeName);
+  });
+
+  describe("serialize()", () => {
+    it("should throw an error when given undefined", () => {
+      try {
+        base64UrlSpec.serialize(["a", "property", "path"], undefined);
+        assert.fail("Expected an error to be thrown.");
+      } catch (error) {
+        assert.strictEqual(error.message, "Property a.property.path with value undefined must be a Buffer.");
+      }
+    });
+
+    it("should throw an error when given 5", () => {
+      try {
+        base64UrlSpec.serialize(["another", "property", "path"], 5);
+        assert.fail("Expected an error to be thrown.");
+      } catch (error) {
+        assert.strictEqual(error.message, "Property another.property.path with value 5 must be a Buffer.");
+      }
+    });
+
+    it("should throw an error when given {}", () => {
+      try {
+        base64UrlSpec.serialize(["another", "property", "path"], {});
+        assert.fail("Expected an error to be thrown.");
+      } catch (error) {
+        assert.strictEqual(error.message, "Property another.property.path with value {} must be a Buffer.");
+      }
+    });
+
+    it("should return a base64 encoded string with no error when given a Buffer", () => {
+      assert.strictEqual(base64UrlSpec.serialize(["this", "one", "works"], new Buffer([0, 1, 2, 3, 4])), "AAECAwQ");
+    });
+  });
+});
\ No newline at end of file
diff --git a/test/serialization/byteArraySpecTests.ts b/test/serialization/byteArraySpecTests.ts
index 0a27d25..5ee5917 100644
--- a/test/serialization/byteArraySpecTests.ts
+++ b/test/serialization/byteArraySpecTests.ts
@@ -4,8 +4,8 @@ import * as assert from "assert";
 import byteArraySpec from "../../lib/serialization/byteArraySpec";
 
 describe("byteArraySpec", () => {
-  it("should have \"ByteArray(Buffer)\" for its typeName property", () => {
-    assert.strictEqual("ByteArray(Buffer)", byteArraySpec.typeName);
+  it("should have \"ByteArray\" for its typeName property", () => {
+    assert.strictEqual("ByteArray", byteArraySpec.typeName);
   });
 
   describe("serialize()", () => {
@@ -14,7 +14,7 @@ describe("byteArraySpec", () => {
         byteArraySpec.serialize(["a", "property", "path"], undefined);
         assert.fail("Expected an error to be thrown.");
       } catch (error) {
-        assert.strictEqual(error.message, "Property a.property.path with value undefined must be a ByteArray(Buffer).");
+        assert.strictEqual(error.message, "Property a.property.path with value undefined must be a Buffer.");
       }
     });
 
@@ -23,7 +23,7 @@ describe("byteArraySpec", () => {
         byteArraySpec.serialize(["another", "property", "path"], 5);
         assert.fail("Expected an error to be thrown.");
       } catch (error) {
-        assert.strictEqual(error.message, "Property another.property.path with value 5 must be a ByteArray(Buffer).");
+        assert.strictEqual(error.message, "Property another.property.path with value 5 must be a Buffer.");
       }
     });
 
@@ -32,7 +32,7 @@ describe("byteArraySpec", () => {
         byteArraySpec.serialize(["another", "property", "path"], {});
         assert.fail("Expected an error to be thrown.");
       } catch (error) {
-        assert.strictEqual(error.message, "Property another.property.path with value {} must be a ByteArray(Buffer).");
+        assert.strictEqual(error.message, "Property another.property.path with value {} must be a Buffer.");
       }
     });