diff --git a/.travis.yml b/.travis.yml
index aef60fa3c7..0aab748960 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -12,4 +12,5 @@ install:
   - pip install pylint
 script:
   - python pylint-recursive.py
+  - python json-validate.py configs/*.json.*
   - python -m unittest discover -v -p "*_test.py"
diff --git a/configs/config.json.cluster.example b/configs/config.json.cluster.example
index 621177658b..ae3c3ad857 100644
--- a/configs/config.json.cluster.example
+++ b/configs/config.json.cluster.example
@@ -108,7 +108,7 @@
 				    "berry_wait_max": 3,
 				    "changeball_wait_min": 2,
 				    "changeball_wait_max": 3
-				  },
+				  }
 	      }
 	    },
       {
diff --git a/configs/config.json.example b/configs/config.json.example
index 48925efd89..5950ef0d08 100644
--- a/configs/config.json.example
+++ b/configs/config.json.example
@@ -108,7 +108,7 @@
 				    "berry_wait_max": 3,
 				    "changeball_wait_min": 2,
 				    "changeball_wait_max": 3
-				  },
+				  }
 	      }
 	    },
       {
diff --git a/configs/config.json.map.example b/configs/config.json.map.example
index 73eff3d465..ba0716eefd 100644
--- a/configs/config.json.map.example
+++ b/configs/config.json.map.example
@@ -108,7 +108,7 @@
 				    "berry_wait_max": 3,
 				    "changeball_wait_min": 2,
 				    "changeball_wait_max": 3
-				  },
+				  }
 	      }
 	    },
       {
diff --git a/configs/config.json.optimizer.example b/configs/config.json.optimizer.example
index fa1c2c3fb1..1dd826428f 100644
--- a/configs/config.json.optimizer.example
+++ b/configs/config.json.optimizer.example
@@ -49,7 +49,7 @@
                     "// would have transfered if the parameter was true": {},
                 "transfer": true,
                     "// 'transfer_wait_min' and 'transfer_wait_max' are the minimum and maximum": {},
-                    "// "time to wait when transferring a pokemon": {},
+                    "// time to wait when transferring a pokemon": {},
                 "transfer_wait_min": 1,
                 "transfer_wait_max": 4,
                     "// the 'evolve' parameter activate or deactivate the evolution of pokemons": {},
@@ -166,7 +166,7 @@
                     "berry_wait_max": 3,
                     "changeball_wait_min": 2,
                     "changeball_wait_max": 3
-                  },
+                  }
           }
         },
       {
diff --git a/configs/config.json.path.example b/configs/config.json.path.example
index acfd9db0cb..9f8f10cbde 100644
--- a/configs/config.json.path.example
+++ b/configs/config.json.path.example
@@ -108,7 +108,7 @@
             "berry_wait_max": 3,
             "changeball_wait_min": 2,
             "changeball_wait_max": 3
-          },
+          }
         }
       },
       {
diff --git a/configs/config.json.pokemon.example b/configs/config.json.pokemon.example
index 5f35a03e80..56eaf60b6a 100644
--- a/configs/config.json.pokemon.example
+++ b/configs/config.json.pokemon.example
@@ -108,7 +108,7 @@
 				    "berry_wait_max": 3,
 				    "changeball_wait_min": 2,
 				    "changeball_wait_max": 3
-				  },
+				  }
 	      }
 	    },
       {
diff --git a/json-validate.py b/json-validate.py
new file mode 100644
index 0000000000..00061ba256
--- /dev/null
+++ b/json-validate.py
@@ -0,0 +1,44 @@
+#! /usr/bin/env python
+'''
+Check whether a json file is loadable
+''' 
+
+import json
+import sys
+
+passed = 0
+failed = 0
+errors = list()
+
+def check(filename):
+  global passed, failed
+
+  print "CHECKING ", filename
+
+  f = open(filename).read()
+  try:
+      _ = json.loads(f)
+      print "PASSED: ", filename
+      passed += 1
+      return True
+  except ValueError as e:
+      failed += 1
+      print "FAILED: ", filename
+      errors.append("FILE: " + filename)
+      errors.append(e)
+      return False
+ 
+  return False
+  
+if __name__ == "__main__":
+  for filename in sys.argv[1:]:
+    check(filename)
+
+  print "Passed: " + str(passed) + " Failed: " + str(failed)
+  print "\n"
+  print "Showing errors:"
+  if failed > 0:
+    for err in errors:
+      print err
+
+    sys.exit("JSON check Failed with errors")