diff --git a/src/json.js b/src/json.js
new file mode 100644
index 0000000..3e42d36
--- /dev/null
+++ b/src/json.js
@@ -0,0 +1,268 @@
+// Copyright 2009 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+var $JSON = global.JSON;
+
+function ParseJSONUnfiltered(text) {
+  var s = $String(text);
+  var f = %CompileString(text, true);
+  return f();
+}
+
+function Revive(holder, name, reviver) {
+  var val = holder[name];
+  if (IS_OBJECT(val)) {
+    if (IS_ARRAY(val)) {
+      var length = val.length;
+      for (var i = 0; i < length; i++) {
+        var newElement = Revive(val, $String(i), reviver);
+        val[i] = newElement;
+      }
+    } else {
+      for (var p in val) {
+        if (ObjectHasOwnProperty.call(val, p)) {
+          var newElement = Revive(val, p, reviver);
+          if (IS_UNDEFINED(newElement)) {
+            delete val[p];
+          } else {
+            val[p] = newElement;
+          }
+        }
+      }
+    }
+  }
+  return reviver.call(holder, name, val);
+}
+
+function JSONParse(text, reviver) {
+  var unfiltered = ParseJSONUnfiltered(text);
+  if (IS_FUNCTION(reviver)) {
+    return Revive({'': unfiltered}, '', reviver);
+  } else {
+    return unfiltered;
+  }
+}
+
+var characterQuoteCache = {
+  '\"': '\\"',
+  '\\': '\\\\',
+  '/': '\\/',
+  '\b': '\\b',
+  '\f': '\\f',
+  '\n': '\\n',
+  '\r': '\\r',
+  '\t': '\\t',
+  '\x0B': '\\u000b'
+};
+
+function QuoteSingleJSONCharacter(c) {
+  if (c in characterQuoteCache) {
+    return characterQuoteCache[c];
+  }
+  var charCode = c.charCodeAt(0);
+  var result;
+  if (charCode < 16) result = '\\u000';
+  else if (charCode < 256) result = '\\u00';
+  else if (charCode < 4096) result = '\\u0';
+  else result = '\\u';
+  result += charCode.toString(16);
+  characterQuoteCache[c] = result;
+  return result;
+}
+
+function QuoteJSONString(str) {
+  var quotable = /[\\\"\x00-\x1f\x80-\uffff]/g;
+  return '"' + str.replace(quotable, QuoteSingleJSONCharacter) + '"';
+}
+
+function StackContains(stack, val) {
+  var length = stack.length;
+  for (var i = 0; i < length; i++) {
+    if (stack[i] === val) {
+      return true;
+    }
+  }
+  return false;
+}
+
+function SerializeArray(value, replacer, stack, indent, gap) {
+  if (StackContains(stack, value)) {
+    throw MakeTypeError('circular_structure', []);
+  }
+  stack.push(value);
+  var stepback = indent;
+  indent += gap;
+  var partial = [];
+  var len = value.length;
+  for (var i = 0; i < len; i++) {
+    var strP = JSONSerialize($String(i), value, replacer, stack,
+                             indent, gap);
+    if (IS_UNDEFINED(strP)) {
+      strP = "null";
+    }
+    partial.push(strP);
+  }
+  var final;
+  if (gap == "") {
+    final = "[" + partial.join(",") + "]";
+  } else if (partial.length > 0) {
+    var separator = ",\n" + indent;
+    final = "[\n" + indent + partial.join(separator) + "\n" +
+        stepback + "]";
+  } else {
+    final = "[]";
+  }
+  stack.pop();
+  return final;
+}
+
+function SerializeObject(value, replacer, stack, indent, gap) {
+  if (StackContains(stack, value)) {
+    throw MakeTypeError('circular_structure', []);
+  }
+  stack.push(value);
+  var stepback = indent;
+  indent += gap;
+  var partial = [];
+  if (IS_ARRAY(replacer)) {
+    var length = replacer.length;
+    for (var i = 0; i < length; i++) {
+      if (ObjectHasOwnProperty.call(replacer, i)) {
+        var p = replacer[i];
+        var strP = JSONSerialize(p, value, replacer, stack, indent, gap);
+        if (!IS_UNDEFINED(strP)) {
+          var member = QuoteJSONString(p) + ":";
+          if (gap != "") member += " ";
+          member += strP;
+          partial.push(member);
+        }
+      }
+    }
+  } else {
+    for (var p in value) {
+      if (ObjectHasOwnProperty.call(value, p)) {
+        var strP = JSONSerialize(p, value, replacer, stack, indent, gap);
+        if (!IS_UNDEFINED(strP)) {
+          var member = QuoteJSONString(p) + ":";
+          if (gap != "") member += " ";
+          member += strP;
+          partial.push(member);
+        }
+      }
+    }
+  }
+  var final;
+  if (gap == "") {
+    final = "{" + partial.join(",") + "}";
+  } else if (partial.length > 0) {
+    var separator = ",\n" + indent;
+    final = "{\n" + indent + partial.join(separator) + "\n" +
+        stepback + "}";
+  } else {
+    final = "{}";
+  }
+  stack.pop();
+  return final;
+}
+
+function JSONSerialize(key, holder, replacer, stack, indent, gap) {
+  var value = holder[key];
+  if (IS_OBJECT(value) && value) {
+    var toJSON = value.toJSON;
+    if (IS_FUNCTION(toJSON)) {
+      value = toJSON.call(value, key);
+    }
+  }
+  if (IS_FUNCTION(replacer)) {
+    value = replacer.call(holder, key, value);
+  }
+  // Unwrap value if necessary
+  if (IS_OBJECT(value)) {
+    if (IS_NUMBER_WRAPPER(value)) {
+      value = $Number(value);
+    } else if (IS_STRING_WRAPPER(value)) {
+      value = $String(value);
+    } else if (IS_BOOLEAN_WRAPPER(value)) {
+      value = $Boolean(value);
+    }
+  }
+  switch (typeof value) {
+    case "string":
+      return QuoteJSONString(value);
+    case "object":
+      if (!value) {
+        return "null";
+      } else if (IS_ARRAY(value)) {
+        return SerializeArray(value, replacer, stack, indent, gap);
+      } else {
+        return SerializeObject(value, replacer, stack, indent, gap);
+      }
+    case "number":
+      return $isFinite(value) ? $String(value) : "null";
+    case "boolean":
+      return value ? "true" : "false";
+  }
+}
+
+function JSONStringify(value, replacer, space) {
+  var stack = [];
+  var indent = "";
+  if (IS_OBJECT(space)) {
+    // Unwrap 'space' if it is wrapped
+    if (IS_NUMBER_WRAPPER(space)) {
+      space = $Number(space);
+    } else if (IS_STRING_WRAPPER(space)) {
+      space = $String(space);
+    }
+  }
+  var gap;
+  if (IS_NUMBER(space)) {
+    space = $Math.min(space, 10);
+    gap = "";
+    for (var i = 0; i < space; i++) {
+      gap += " ";
+    }
+  } else if (IS_STRING(space)) {
+    if (space.length > 10) {
+      gap = space.substring(0, 10);
+    } else {
+      gap = space;
+    }
+  } else {
+    gap = "";
+  }
+  return JSONSerialize('', {'': value}, replacer, stack, indent, gap);
+}
+
+function SetupJSON() {
+  InstallFunctions($JSON, DONT_ENUM, $Array(
+    "parse", JSONParse,
+    "stringify", JSONStringify
+  ));
+}
+
+SetupJSON();