diff --git a/Yesod/Json.hs b/Yesod/Json.hs
--- a/Yesod/Json.hs
+++ b/Yesod/Json.hs
@@ -5,6 +5,8 @@
     ( -- * Convert from a JSON value
       defaultLayoutJson
     , jsonToRepJson
+      -- * Convert to a JSON value
+    , parseJsonBody
       -- * Compatibility wrapper for old API
     , Json
     , jsonScalar
@@ -22,8 +24,10 @@
 import qualified Data.Aeson as J
 import qualified Data.Aeson.Encode as JE
 import Data.Aeson.Encode (fromValue)
+import Data.Attoparsec.Enumerator (iterParser)
 import Data.Text (pack)
 import Control.Arrow (first)
+import Control.Monad.Trans.Class (lift)
 #if MIN_VERSION_aeson(0, 4, 0)
 import Data.HashMap.Strict (fromList)
 #else
@@ -61,6 +65,13 @@
 -- | Wraps the 'Content' generated by 'jsonToContent' in a 'RepJson'.
 jsonToRepJson :: J.Value -> GHandler sub master RepJson
 jsonToRepJson = return . RepJson . toContent
+
+-- | Parse the request body as a JSON value.
+--
+-- /Since: 0.2.3/
+parseJsonBody :: GHandler sub master J.Value
+parseJsonBody = lift $ iterParser J.json'
+
 
 type Json = J.Value
 
diff --git a/yesod-json.cabal b/yesod-json.cabal
--- a/yesod-json.cabal
+++ b/yesod-json.cabal
@@ -1,5 +1,5 @@
 name:            yesod-json
-version:         0.2.2.3
+version:         0.2.3
 license:         BSD3
 license-file:    LICENSE
 author:          Michael Snoyman <michael@snoyman.com>
@@ -13,15 +13,17 @@
 description:     Generate content for Yesod using the aeson package.
 
 library
-    build-depends:   base                 >= 4        && < 5
-                   , yesod-core           >= 0.9      && < 0.10
-                   , aeson                >= 0.3
-                   , text                 >= 0.8      && < 0.12
-                   , shakespeare-js       >= 0.10     && < 0.11
-                   , vector               >= 0.9
-                   , containers           >= 0.2      && < 0.5
+    build-depends:   base                  >= 4        && < 5
+                   , yesod-core            >= 0.9      && < 0.10
+                   , aeson                 >= 0.3
+                   , text                  >= 0.8      && < 0.12
+                   , shakespeare-js        >= 0.10     && < 0.11
+                   , vector                >= 0.9
+                   , containers            >= 0.2      && < 0.5
                    , unordered-containers
                    , blaze-builder
+                   , attoparsec-enumerator >= 0.3      && < 0.4
+                   , transformers          >= 0.2.2    && < 0.3
     exposed-modules: Yesod.Json
     ghc-options:     -Wall