diff --git a/README.md b/README.md
index 7fed8e7..55e1b9d 100644
--- a/README.md
+++ b/README.md
@@ -5,3 +5,14 @@ erlAarango 二进制序列化库
 Build
 -----
     $ rebar3 compile
+
+# vpackVal
+    * `vpackVal`: this tool can be used to validate a VPack value in a file for
+      correctness. The tool expects the (binary) VPack input file it should read from 
+      in its first argument. It will return status code 0 if the VPack is valid, and
+      a non-0 exit code if the VPack is invalid.
+    
+      Further options for *vpack-validate* are:
+      * `--hex`: try to turn hex-encoded input into binary vpack
+    
+      On Linux, *vpack-validate* supports the pseudo filename `-` for stdin.
\ No newline at end of file
diff --git a/src/eVPTest.erl b/src/eVPTest.erl
new file mode 100644
index 0000000..871a943
--- /dev/null
+++ b/src/eVPTest.erl
@@ -0,0 +1,64 @@
+-module(eVPTest).
+
+-export([binToHex/1, test/1, test/3]).
+
+-define(Hex(X), (getHex(X)):16).
+
+binToHex(Bin) ->
+   <<<<?Hex(X)>> || <<X:8>> <= Bin>>.
+
+getHex(X) ->
+   element(X + 1,
+      {
+         16#3030, 16#3031, 16#3032, 16#3033, 16#3034, 16#3035, 16#3036,
+         16#3037, 16#3038, 16#3039, 16#3061, 16#3062, 16#3063, 16#3064,
+         16#3065, 16#3066, 16#3130, 16#3131, 16#3132, 16#3133, 16#3134,
+         16#3135, 16#3136, 16#3137, 16#3138, 16#3139, 16#3161, 16#3162,
+         16#3163, 16#3164, 16#3165, 16#3166, 16#3230, 16#3231, 16#3232,
+         16#3233, 16#3234, 16#3235, 16#3236, 16#3237, 16#3238, 16#3239,
+         16#3261, 16#3262, 16#3263, 16#3264, 16#3265, 16#3266, 16#3330,
+         16#3331, 16#3332, 16#3333, 16#3334, 16#3335, 16#3336, 16#3337,
+         16#3338, 16#3339, 16#3361, 16#3362, 16#3363, 16#3364, 16#3365,
+         16#3366, 16#3430, 16#3431, 16#3432, 16#3433, 16#3434, 16#3435,
+         16#3436, 16#3437, 16#3438, 16#3439, 16#3461, 16#3462, 16#3463,
+         16#3464, 16#3465, 16#3466, 16#3530, 16#3531, 16#3532, 16#3533,
+         16#3534, 16#3535, 16#3536, 16#3537, 16#3538, 16#3539, 16#3561,
+         16#3562, 16#3563, 16#3564, 16#3565, 16#3566, 16#3630, 16#3631,
+         16#3632, 16#3633, 16#3634, 16#3635, 16#3636, 16#3637, 16#3638,
+         16#3639, 16#3661, 16#3662, 16#3663, 16#3664, 16#3665, 16#3666,
+         16#3730, 16#3731, 16#3732, 16#3733, 16#3734, 16#3735, 16#3736,
+         16#3737, 16#3738, 16#3739, 16#3761, 16#3762, 16#3763, 16#3764,
+         16#3765, 16#3766, 16#3830, 16#3831, 16#3832, 16#3833, 16#3834,
+         16#3835, 16#3836, 16#3837, 16#3838, 16#3839, 16#3861, 16#3862,
+         16#3863, 16#3864, 16#3865, 16#3866, 16#3930, 16#3931, 16#3932,
+         16#3933, 16#3934, 16#3935, 16#3936, 16#3937, 16#3938, 16#3939,
+         16#3961, 16#3962, 16#3963, 16#3964, 16#3965, 16#3966, 16#6130,
+         16#6131, 16#6132, 16#6133, 16#6134, 16#6135, 16#6136, 16#6137,
+         16#6138, 16#6139, 16#6161, 16#6162, 16#6163, 16#6164, 16#6165,
+         16#6166, 16#6230, 16#6231, 16#6232, 16#6233, 16#6234, 16#6235,
+         16#6236, 16#6237, 16#6238, 16#6239, 16#6261, 16#6262, 16#6263,
+         16#6264, 16#6265, 16#6266, 16#6330, 16#6331, 16#6332, 16#6333,
+         16#6334, 16#6335, 16#6336, 16#6337, 16#6338, 16#6339, 16#6361,
+         16#6362, 16#6363, 16#6364, 16#6365, 16#6366, 16#6430, 16#6431,
+         16#6432, 16#6433, 16#6434, 16#6435, 16#6436, 16#6437, 16#6438,
+         16#6439, 16#6461, 16#6462, 16#6463, 16#6464, 16#6465, 16#6466,
+         16#6530, 16#6531, 16#6532, 16#6533, 16#6534, 16#6535, 16#6536,
+         16#6537, 16#6538, 16#6539, 16#6561, 16#6562, 16#6563, 16#6564,
+         16#6565, 16#6566, 16#6630, 16#6631, 16#6632, 16#6633, 16#6634,
+         16#6635, 16#6636, 16#6637, 16#6638, 16#6639, 16#6661, 16#6662,
+         16#6663, 16#6664, 16#6665, 16#6666
+      }).
+
+test(Term) ->
+   VPBin = eVPack:encodeBin(Term),
+   VPBinHex = binToHex(VPBin),
+   file:write_file("./vpackbin", VPBinHex),
+   os:cmd("./vpackVal --hex vpackbin").
+
+test(Term, ArrOpt, ObjOpt) ->
+   VPBin = eVPack:encodeBin(Term, ArrOpt, ObjOpt),
+   VPBinHex = binToHex(VPBin),
+   file:write_file("./vpackbin", VPBinHex),
+   os:cmd("./vpackVal --hex vpackbin").
+
+
diff --git a/vpackVal b/vpackVal
new file mode 100644
index 0000000..cdeb842
Binary files /dev/null and b/vpackVal differ