diff --git a/src/Squidex.Core/Schemas/BooleanField.cs b/src/Squidex.Core/Schemas/BooleanField.cs
index 1097d3eb9..31d3c840b 100644
--- a/src/Squidex.Core/Schemas/BooleanField.cs
+++ b/src/Squidex.Core/Schemas/BooleanField.cs
@@ -6,8 +6,10 @@
 //  All rights reserved.
 // ==========================================================================
 
+using System;
 using System.Collections.Generic;
 using Newtonsoft.Json.Linq;
+using NJsonSchema;
 using Squidex.Core.Schemas.Validators;
 
 namespace Squidex.Core.Schemas
@@ -31,5 +33,10 @@ namespace Squidex.Core.Schemas
         {
             return (bool?)value;
         }
+
+        protected override void PrepareJsonSchema(JsonProperty jsonProperty)
+        {
+            jsonProperty.Type = JsonObjectType.Boolean;
+        }
     }
 }
diff --git a/src/Squidex.Core/Schemas/Field.cs b/src/Squidex.Core/Schemas/Field.cs
index 57805b577..44a22ea0a 100644
--- a/src/Squidex.Core/Schemas/Field.cs
+++ b/src/Squidex.Core/Schemas/Field.cs
@@ -10,6 +10,7 @@ using System;
 using System.Collections.Generic;
 using System.Threading.Tasks;
 using Newtonsoft.Json.Linq;
+using NJsonSchema;
 using Squidex.Infrastructure;
 // ReSharper disable InvertIf
 // ReSharper disable ConvertIfStatementToReturnStatement
@@ -127,8 +128,64 @@ namespace Squidex.Core.Schemas
             return Clone<Field>(clone => clone.name = newName);
         }
 
+        public void AddToSchema(JsonSchema4 schema, HashSet<Language> languages)
+        {
+            Guard.NotNull(schema, nameof(schema));
+            Guard.NotEmpty(languages, nameof(languages));
+
+            if (RawProperties.IsLocalizable)
+            {
+                var localizableProperty = new JsonProperty { IsRequired = true, Type = JsonObjectType.Object };
+                var localizableType = new JsonSchema4 { Id = $"{Name}ByLanguage" };
+
+                foreach (var language in languages)
+                {
+                    var languageProperty = CreateProperty();
+
+                    if (!string.IsNullOrWhiteSpace(languageProperty.Title))
+                    {
+                        languageProperty.Title += $" ({language.EnglishName})";
+                    }
+
+                    localizableType.Properties.Add(language.Iso2Code, languageProperty);
+                }
+
+                localizableProperty.OneOf.Add(localizableType);
+
+                schema.Properties.Add(Name, localizableProperty);
+            }
+            else
+            {
+                schema.Properties.Add(Name, CreateProperty());
+            }
+        }
+
+        public JsonProperty CreateProperty()
+        {
+            var jsonProperty = new JsonProperty { IsRequired = RawProperties.IsRequired };
+
+            if (!string.IsNullOrWhiteSpace(RawProperties.Hints))
+            {
+                jsonProperty.Title = RawProperties.Hints;
+            }
+            else if (!string.IsNullOrWhiteSpace(RawProperties.Label))
+            {
+                jsonProperty.Title = $"The {RawProperties.Label} field";
+            }
+            else
+            {
+                jsonProperty.Title = $"The {Name} field";
+            }
+
+            PrepareJsonSchema(jsonProperty);
+
+            return jsonProperty;
+        }
+
         protected abstract IEnumerable<IValidator> CreateValidators();
 
+        protected abstract void PrepareJsonSchema(JsonProperty jsonProperty);
+
         protected abstract object ConvertValue(JToken value);
     }
 }
\ No newline at end of file
diff --git a/src/Squidex.Core/Schemas/NumberField.cs b/src/Squidex.Core/Schemas/NumberField.cs
index c9095c45f..c07bcf360 100644
--- a/src/Squidex.Core/Schemas/NumberField.cs
+++ b/src/Squidex.Core/Schemas/NumberField.cs
@@ -9,6 +9,7 @@
 using System.Collections.Generic;
 using System.Linq;
 using Newtonsoft.Json.Linq;
+using NJsonSchema;
 using Squidex.Core.Schemas.Validators;
 
 namespace Squidex.Core.Schemas
@@ -38,6 +39,21 @@ namespace Squidex.Core.Schemas
             }
         }
 
+        protected override void PrepareJsonSchema(JsonProperty jsonProperty)
+        {
+            jsonProperty.Type = JsonObjectType.Number;
+
+            if (Properties.MinValue.HasValue)
+            {
+                jsonProperty.Minimum = (decimal)Properties.MinValue.Value;
+            }
+
+            if (Properties.MaxValue.HasValue)
+            {
+                jsonProperty.Maximum = (decimal)Properties.MaxValue.Value;
+            }
+        }
+
         protected override object ConvertValue(JToken value)
         {
             return (double?)value;
diff --git a/src/Squidex.Core/Schemas/Schema.cs b/src/Squidex.Core/Schemas/Schema.cs
index 15cb646c7..f7caa72e4 100644
--- a/src/Squidex.Core/Schemas/Schema.cs
+++ b/src/Squidex.Core/Schemas/Schema.cs
@@ -12,6 +12,7 @@ using System.Collections.Immutable;
 using System.Linq;
 using System.Threading.Tasks;
 using Newtonsoft.Json.Linq;
+using NJsonSchema;
 using Squidex.Infrastructure;
 
 // ReSharper disable InvertIf
@@ -165,6 +166,33 @@ namespace Squidex.Core.Schemas
             return AddOrUpdateField(newField);
         }
 
+        public JsonSchema4 BuildSchema(HashSet<Language> languages)
+        {
+            Guard.NotEmpty(languages, nameof(languages));
+
+            var schema = new JsonSchema4 { Id = Name };
+
+            if (!string.IsNullOrWhiteSpace(Properties.Hints))
+            {
+                schema.Title = Properties.Hints;
+            }
+            else if (!string.IsNullOrWhiteSpace(Properties.Label))
+            {
+                schema.Title = $"The {Properties.Label} field";
+            }
+            else
+            {
+                schema.Title = $"The {Name} field";
+            }
+
+            foreach (var field in fieldsByName.Values)
+            {
+                field.AddToSchema(schema, languages);
+            }
+
+            return schema;
+        }
+
         public async Task ValidateAsync(JObject data, IList<ValidationError> errors, HashSet<Language> languages)
         {
             Guard.NotNull(data, nameof(data));
diff --git a/src/Squidex.Core/Schemas/StringField.cs b/src/Squidex.Core/Schemas/StringField.cs
index 412c6f23a..8b57f3490 100644
--- a/src/Squidex.Core/Schemas/StringField.cs
+++ b/src/Squidex.Core/Schemas/StringField.cs
@@ -7,8 +7,10 @@
 // ==========================================================================
 
 using System.Collections.Generic;
+using System.Collections.ObjectModel;
 using System.Linq;
 using Newtonsoft.Json.Linq;
+using NJsonSchema;
 using Squidex.Core.Schemas.Validators;
 
 namespace Squidex.Core.Schemas
@@ -47,5 +49,18 @@ namespace Squidex.Core.Schemas
         {
             return value.ToString();
         }
+
+        protected override void PrepareJsonSchema(JsonProperty jsonProperty)
+        {
+            jsonProperty.Type = JsonObjectType.String;
+
+            jsonProperty.MinLength = Properties.MinLength;
+            jsonProperty.MaxLength = Properties.MaxLength;
+
+            if (Properties.AllowedValues != null)
+            {
+                jsonProperty.EnumerationNames = new Collection<string>(Properties.AllowedValues);
+            }
+        }
     }
 }
diff --git a/src/Squidex.Core/project.json b/src/Squidex.Core/project.json
index 8692a4f1a..1a55ec103 100644
--- a/src/Squidex.Core/project.json
+++ b/src/Squidex.Core/project.json
@@ -4,7 +4,8 @@
     "Squidex.Infrastructure": "1.0.0-*",
     "protobuf-net": "2.1.0",
     "NETStandard.Library": "1.6.1",
-    "Microsoft.NETCore.App": "1.1.0"
+    "Microsoft.NETCore.App": "1.1.0",
+    "NJsonSchema": "7.6.6221.22528"
   },
   "frameworks": {
     "netcoreapp1.0": {
diff --git a/tests/Squidex.Core.Tests/Schemas/Json/JsonSerializerTests.cs b/tests/Squidex.Core.Tests/Schemas/Json/JsonSerializerTests.cs
index 39577e06c..5b6e33bbc 100644
--- a/tests/Squidex.Core.Tests/Schemas/Json/JsonSerializerTests.cs
+++ b/tests/Squidex.Core.Tests/Schemas/Json/JsonSerializerTests.cs
@@ -32,12 +32,13 @@ namespace Squidex.Core.Schemas.Json
         {
             var schema =
                 Schema.Create("my-schema", new SchemaProperties())
-                    .AddOrUpdateField(new StringField(1, "field1", new StringFieldProperties { Label = "Field1", Pattern = "[0-9]{3}" }))
-                    .AddOrUpdateField(new NumberField(2, "field2", new NumberFieldProperties { Hints = "Hints" }))
-                    .AddOrUpdateField(new BooleanField(2, "field2", new BooleanFieldProperties()))
-                    .Publish()
-                    .HideField(2)
-                    .DisableField(1);
+                    .AddOrUpdateField(new StringField(1, "field1", 
+                        new StringFieldProperties { Label = "Field1", Pattern = "[0-9]{3}" })).DisableField(1)
+                    .AddOrUpdateField(new NumberField(2, "field2", 
+                        new NumberFieldProperties { Hints = "Hints" }))
+                    .AddOrUpdateField(new BooleanField(3, "field2", 
+                        new BooleanFieldProperties())).HideField(2)
+                    .Publish();
 
 
             var sut = new SchemaJsonSerializer(new FieldRegistry(), serializerSettings);
diff --git a/tests/Squidex.Core.Tests/Schemas/SchemaTests.cs b/tests/Squidex.Core.Tests/Schemas/SchemaTests.cs
index 38f2ca803..7770d1937 100644
--- a/tests/Squidex.Core.Tests/Schemas/SchemaTests.cs
+++ b/tests/Squidex.Core.Tests/Schemas/SchemaTests.cs
@@ -8,6 +8,7 @@
 
 using System;
 using System.Collections.Generic;
+using System.Collections.Immutable;
 using Squidex.Infrastructure;
 using Xunit;
 
@@ -243,6 +244,25 @@ namespace Squidex.Core.Schemas
             Assert.Throws<DomainException>(() => sut.Unpublish());
         }
 
+        [Fact]
+        public void Should_build_schema()
+        {
+            var schema = 
+                Schema.Create("user", new SchemaProperties { Hints = "The User" })
+                    .AddOrUpdateField(new StringField(1, "firstName", 
+                        new StringFieldProperties { Label = "FirstName", IsLocalizable = true, IsRequired = true, AllowedValues = new [] { "1", "2" }.ToImmutableList() }))
+                    .AddOrUpdateField(new StringField(2, "lastName",  
+                        new StringFieldProperties { Hints = "Last Name" }))
+                    .AddOrUpdateField(new BooleanField(3, "admin", 
+                        new BooleanFieldProperties()))
+                    .AddOrUpdateField(new NumberField(4, "age",
+                        new NumberFieldProperties()));
+
+            var json = schema.BuildSchema(new HashSet<Language>(new [] { Language.GetLanguage("de"), Language.GetLanguage("en") })).ToJson();
+
+            Assert.NotNull(json);
+        }
+
         private NumberField AddField()
         {
             var field = new NumberField(1, "my-field", new NumberFieldProperties());