diff --git a/go.mod b/go.mod
index 7a8d626..415bf18 100644
--- a/go.mod
+++ b/go.mod
@@ -4,6 +4,6 @@ go 1.13
 
 require (
 	github.com/davecgh/go-spew v1.1.1
+	github.com/google/go-cmp v0.3.1
 	github.com/zclconf/go-cty v1.2.1
-	gotest.tools/gotestsum v0.5.2 // indirect
 )
diff --git a/go.sum b/go.sum
index ecf2086..1bb6997 100644
--- a/go.sum
+++ b/go.sum
@@ -1,56 +1,19 @@
 github.com/apparentlymart/go-textseg v1.0.0/go.mod h1:z96Txxhf3xSFMPmb5X/1W05FF/Nj9VFpLOpjS5yuumk=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/fatih/color v1.9.0 h1:8xPHl4/q1VyqGIPif1F+1V3Y3lSmrq01EabUW3CoW5s=
-github.com/fatih/color v1.9.0/go.mod h1:eQcE1qtQxscV5RaZvpXrrb8Drkc3/DdQ+uUYCNjL+zU=
 github.com/golang/protobuf v1.1.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
-github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
 github.com/google/go-cmp v0.3.1 h1:Xye71clBPdm5HgqGwUkwhbynsUJZhDbS20FvLhQ2izg=
 github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
-github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510 h1:El6M4kTTCOh6aBiKaUGG7oYTSPP8MxqL4YI3kZKwcP4=
-github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510/go.mod h1:pupxD2MaaD3pAXIBCelhxNneeOaAeabZDe5s4K6zSpQ=
-github.com/jonboulle/clockwork v0.1.0 h1:VKV+ZcuP6l3yW9doeqz6ziZGgcynBVQO+obU0+0hcPo=
-github.com/jonboulle/clockwork v0.1.0/go.mod h1:Ii8DK3G1RaLaWxj9trq07+26W01tbo22gdxWY5EU2bo=
 github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
 github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
 github.com/kylelemons/godebug v0.0.0-20170820004349-d65d576e9348/go.mod h1:B69LEHPfb2qLo0BaaOLcbitczOKLWTsrBG9LczfCD4k=
-github.com/mattn/go-colorable v0.1.4/go.mod h1:U0ppj6V5qS13XJ6of8GYAs25YV2eR4EVcfRqFIhoBtE=
-github.com/mattn/go-colorable v0.1.6 h1:6Su7aK7lXmJ/U79bYtBjLNaha4Fs1Rg9plHpcH+vvnE=
-github.com/mattn/go-colorable v0.1.6/go.mod h1:u6P/XSegPjTcexA+o6vUJrdnUu04hMope9wVRipJSqc=
-github.com/mattn/go-isatty v0.0.8/go.mod h1:Iq45c/XA43vh69/j3iqttzPXn0bhXyGjM0Hdxcsrc5s=
-github.com/mattn/go-isatty v0.0.11/go.mod h1:PhnuNfih5lzO57/f3n+odYbM4JtupLOxQOAqxQCu2WE=
-github.com/mattn/go-isatty v0.0.12 h1:wuysRhFDzyxgEmMf5xjvJ2M9dZoWAXNNr5LSBS7uHXY=
-github.com/mattn/go-isatty v0.0.12/go.mod h1:cbi8OIDigv2wuxKPP5vlRcQ1OAZbq2CE4Kysco4FUpU=
-github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
-github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
-github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
-github.com/spf13/pflag v1.0.3 h1:zPAT6CGy6wXeQ7NtTnaTerfKOsV6V6F8agHXFiazDkg=
-github.com/spf13/pflag v1.0.3/go.mod h1:DYY7MBk1bdzusC3SYhjObp+wFpr4gzcvqqNjLnInEg4=
 github.com/vmihailenco/msgpack v3.3.3+incompatible/go.mod h1:fy3FlTQTDXWkZ7Bh6AcGMlsjHatGryHQYUTf1ShIgkk=
 github.com/zclconf/go-cty v1.2.1 h1:vGMsygfmeCl4Xb6OA5U5XVAaQZ69FvoG7X2jUtQujb8=
 github.com/zclconf/go-cty v1.2.1/go.mod h1:hOPWgoHbaTUnI5k4D2ld+GRpFJSCe6bCM7m1q/N4PQ8=
-golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2 h1:VklqNMn3ovrHsnt90PveolxSbWFaJdECFbxSq0Mqo2M=
-golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/net v0.0.0-20180811021610-c39426892332/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
-golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.0.0-20190423024810-112230192c58 h1:8gQV6CLnAEikrhgkHFbMAEhagSSnXWGV915qUMm9mrU=
-golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200116001909-b77594299b42/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200515095857-1151b9dac4a9 h1:YTzHMGlqJu67/uEo1lBv0n3wBXhXNeUbB1XfN2vmTm0=
-golang.org/x/sys v0.0.0-20200515095857-1151b9dac4a9/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
-golang.org/x/tools v0.0.0-20190624222133-a101b041ded4 h1:1mMox4TgefDwqluYCv677yNXwlfTkija4owZve/jr78=
-golang.org/x/tools v0.0.0-20190624222133-a101b041ded4/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc=
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gotest.tools v2.2.0+incompatible h1:VsBPFP1AI068pPrMxtb/S8Zkgf9xEmTLJjfM+P5UIEo=
-gotest.tools/gotestsum v0.5.2 h1:sSKWtEFqorHhuBCHU6MeUl50cq9U2J3d1m5NlQTVrbY=
-gotest.tools/gotestsum v0.5.2/go.mod h1:hC9TQserDVTWcJuARh76Ydp3ZwuE+pIIWpt2BzDLD6M=
-gotest.tools/v3 v3.0.2/go.mod h1:3SzNCllyD9/Y+b5r9JIKQ474KzkZyqLqEfYqMsX94Bk=
diff --git a/validate.go b/validate.go
new file mode 100644
index 0000000..7de13ad
--- /dev/null
+++ b/validate.go
@@ -0,0 +1,33 @@
+package tfjson
+
+// Pos represents a position in a config file
+type Pos struct {
+	Line   int `json:"line"`
+	Column int `json:"column"`
+	Byte   int `json:"byte"`
+}
+
+// Range represents a range of bytes between two positions
+type Range struct {
+	Filename string `json:"filename"`
+	Start    Pos    `json:"start"`
+	End      Pos    `json:"end"`
+}
+
+// Diagnostic represents information to be presented to a user about an
+// error or anomaly in parsing or evaluating configuration
+type Diagnostic struct {
+	Severity string `json:"severity,omitempty"`
+	Summary  string `json:"summary,omitempty"`
+	Detail   string `json:"detail,omitempty"`
+	Range    *Range `json:"range,omitempty"`
+}
+
+// ValidateOutput represents JSON output from terraform validate
+// (available from 0.12 onwards)
+type ValidateOutput struct {
+	Valid        bool         `json:"valid"`
+	ErrorCount   int          `json:"error_count"`
+	WarningCount int          `json:"warning_count"`
+	Diagnostics  []Diagnostic `json:"diagnostics"`
+}
diff --git a/validate_test.go b/validate_test.go
new file mode 100644
index 0000000..2ddb59c
--- /dev/null
+++ b/validate_test.go
@@ -0,0 +1,109 @@
+package tfjson
+
+import (
+	"encoding/json"
+	"testing"
+
+	"github.com/google/go-cmp/cmp"
+)
+
+func TestValidateOutput_error(t *testing.T) {
+	errOutput := `{
+  "valid": false,
+  "error_count": 1,
+  "warning_count": 0,
+  "diagnostics": [
+    {
+      "severity": "error",
+      "summary": "Could not load plugin",
+      "detail": "\nPlugin reinitialization required..."
+    }
+  ]
+}`
+	var parsed ValidateOutput
+	if err := json.Unmarshal([]byte(errOutput), &parsed); err != nil {
+		t.Fatal(err)
+	}
+
+	expected := &ValidateOutput{
+		ErrorCount: 1,
+		Diagnostics: []Diagnostic{
+			{
+				Severity: "error",
+				Summary:  "Could not load plugin",
+				Detail:   "\nPlugin reinitialization required...",
+			},
+		},
+	}
+	if diff := cmp.Diff(expected, &parsed); diff != "" {
+		t.Fatalf("output mismatch: %s", diff)
+	}
+}
+
+func TestValidateOutput_basic(t *testing.T) {
+	errOutput := `{
+  "valid": false,
+  "error_count": 1,
+  "warning_count": 1,
+  "diagnostics": [
+    {
+      "severity": "warning",
+      "summary": "\"anonymous\": [DEPRECATED] For versions later than 3.0.0, absence of a token enables this mode"
+    },
+    {
+      "severity": "error",
+      "summary": "Missing required argument",
+      "detail": "The argument \"name\" is required, but no definition was found.",
+      "range": {
+        "filename": "main.tf",
+        "start": {
+          "line": 14,
+          "column": 37,
+          "byte": 200
+        },
+        "end": {
+          "line": 14,
+          "column": 37,
+          "byte": 200
+        }
+      }
+    }
+  ]
+}`
+	var parsed ValidateOutput
+	if err := json.Unmarshal([]byte(errOutput), &parsed); err != nil {
+		t.Fatal(err)
+	}
+
+	expected := &ValidateOutput{
+		ErrorCount:   1,
+		WarningCount: 1,
+		Diagnostics: []Diagnostic{
+			{
+				Severity: "warning",
+				Summary:  "\"anonymous\": [DEPRECATED] For versions later than 3.0.0, absence of a token enables this mode",
+			},
+			{
+				Severity: "error",
+				Summary:  "Missing required argument",
+				Detail:   "The argument \"name\" is required, but no definition was found.",
+				Range: &Range{
+					Filename: "main.tf",
+					Start: Pos{
+						Line:   14,
+						Column: 37,
+						Byte:   200,
+					},
+					End: Pos{
+						Line:   14,
+						Column: 37,
+						Byte:   200,
+					},
+				},
+			},
+		},
+	}
+	if diff := cmp.Diff(expected, &parsed); diff != "" {
+		t.Fatalf("output mismatch: %s", diff)
+	}
+}