diff --git a/SabreTools.Library/DatItems/BiosSet.cs b/SabreTools.Library/DatItems/BiosSet.cs
index 2a102c03..1f1aa5f1 100644
--- a/SabreTools.Library/DatItems/BiosSet.cs
+++ b/SabreTools.Library/DatItems/BiosSet.cs
@@ -1,4 +1,5 @@
 using SabreTools.Library.Data;
+using Newtonsoft.Json;
 
 namespace SabreTools.Library.DatItems
 {
@@ -12,11 +13,13 @@ namespace SabreTools.Library.DatItems
         /// <summary>
         /// Description of the BIOS
         /// </summary>
+        [JsonProperty("description")]
         public string Description { get; set; }
 
         /// <summary>
         /// Determine whether the BIOS is default
         /// </summary>
+        [JsonProperty("default")]
         public bool? Default { get; set; }
 
         #endregion
diff --git a/SabreTools.Library/DatItems/DatItem.cs b/SabreTools.Library/DatItems/DatItem.cs
index 363deae6..5ac50432 100644
--- a/SabreTools.Library/DatItems/DatItem.cs
+++ b/SabreTools.Library/DatItems/DatItem.cs
@@ -7,6 +7,7 @@ using SabreTools.Library.Data;
 using SabreTools.Library.DatFiles;
 using SabreTools.Library.Tools;
 using NaturalSort;
+using Newtonsoft.Json;
 
 namespace SabreTools.Library.DatItems
 {
@@ -17,7 +18,7 @@ namespace SabreTools.Library.DatItems
     {
         #region Protected instance variables
 
-        // Machine information
+        [JsonIgnore]
         protected Machine _machine = new Machine();
 
         #endregion
@@ -29,16 +30,19 @@ namespace SabreTools.Library.DatItems
         /// <summary>
         /// Name of the item
         /// </summary>
+        [JsonProperty("name")]
         public string Name { get; set; }
 
         /// <summary>
         /// Item type for outputting
         /// </summary>
+        [JsonIgnore]
         public ItemType ItemType { get; set; }
 
         /// <summary>
         /// Duplicate type when compared to another item
         /// </summary>
+        [JsonIgnore]
         public DupeType DupeType { get; set; }
 
         #endregion
@@ -48,6 +52,7 @@ namespace SabreTools.Library.DatItems
         /// <summary>
         /// Name of the machine associated with the item
         /// </summary>
+        [JsonIgnore]
         public string MachineName
         {
             get
@@ -73,6 +78,7 @@ namespace SabreTools.Library.DatItems
         /// <summary>
         /// Additional notes on the machine
         /// </summary>
+        [JsonIgnore]
         public string Comment
         {
             get
@@ -98,6 +104,7 @@ namespace SabreTools.Library.DatItems
         /// <summary>
         /// Extended description of the machine
         /// </summary>
+        [JsonIgnore]
         public string MachineDescription
         {
             get
@@ -123,6 +130,7 @@ namespace SabreTools.Library.DatItems
         /// <summary>
         /// Machine year(s) of release/manufacture
         /// </summary>
+        [JsonIgnore]
         public string Year
         {
             get
@@ -148,6 +156,7 @@ namespace SabreTools.Library.DatItems
         /// <summary>
         /// Machine manufacturer, if available
         /// </summary>
+        [JsonIgnore]
         public string Manufacturer
         {
             get
@@ -173,6 +182,7 @@ namespace SabreTools.Library.DatItems
         /// <summary>
         /// Machine publisher, if available
         /// </summary>
+        [JsonIgnore]
         public string Publisher
         {
             get
@@ -198,6 +208,7 @@ namespace SabreTools.Library.DatItems
         /// <summary>
         /// Machine romof parent
         /// </summary>
+        [JsonIgnore]
         public string RomOf
         {
             get
@@ -223,6 +234,7 @@ namespace SabreTools.Library.DatItems
         /// <summary>
         /// Machine cloneof parent
         /// </summary>
+        [JsonIgnore]
         public string CloneOf
         {
             get
@@ -248,6 +260,7 @@ namespace SabreTools.Library.DatItems
         /// <summary>
         /// Machine sampleof parent
         /// </summary>
+        [JsonIgnore]
         public string SampleOf
         {
             get
@@ -274,6 +287,7 @@ namespace SabreTools.Library.DatItems
         /// Machine support status
         /// </summary>
         /// <remarks>yes = true, partial = null, no = false</remarks>
+        [JsonIgnore]
         public bool? Supported
         {
             get
@@ -299,6 +313,7 @@ namespace SabreTools.Library.DatItems
         /// <summary>
         /// Emulator source file related to the machine
         /// </summary>
+        [JsonIgnore]
         public string SourceFile
         {
             get
@@ -325,6 +340,7 @@ namespace SabreTools.Library.DatItems
         /// Machine runnable status
         /// </summary>
         /// <remarks>yes = true, partial = null, no = false</remarks>
+        [JsonIgnore]
         public bool? Runnable
         {
             get
@@ -350,6 +366,7 @@ namespace SabreTools.Library.DatItems
         /// <summary>
         /// Machine board name
         /// </summary>
+        [JsonIgnore]
         public string Board
         {
             get
@@ -375,6 +392,7 @@ namespace SabreTools.Library.DatItems
         /// <summary>
         /// Rebuild location if different than machine name
         /// </summary>
+        [JsonIgnore]
         public string RebuildTo
         {
             get
@@ -400,6 +418,7 @@ namespace SabreTools.Library.DatItems
         /// <summary>
         /// List of associated device names
         /// </summary>
+        [JsonIgnore]
         public List<string> Devices
         {
             get
@@ -425,6 +444,7 @@ namespace SabreTools.Library.DatItems
         /// <summary>
         /// List of slot options
         /// </summary>
+        [JsonIgnore]
         public List<string> SlotOptions
         {
             get
@@ -450,6 +470,7 @@ namespace SabreTools.Library.DatItems
         /// <summary>
         /// List of info items
         /// </summary>
+        [JsonIgnore]
         public List<KeyValuePair<string, string>> Infos
         {
             get
@@ -475,6 +496,7 @@ namespace SabreTools.Library.DatItems
         /// <summary>
         /// Type of the associated machine
         /// </summary>
+        [JsonIgnore]
         public MachineType MachineType
         {
             get
@@ -504,26 +526,31 @@ namespace SabreTools.Library.DatItems
         /// <summary>
         /// Original hardware part associated with the item
         /// </summary>
+        [JsonProperty("partname")]
         public string PartName { get; set; }
 
         /// <summary>
         /// Original hardware interface associated with the item
         /// </summary>
+        [JsonProperty("partinterface")]
         public string PartInterface { get; set; }
 
         /// <summary>
         /// Features provided to/by the item
         /// </summary>
+        [JsonProperty("features")]
         public List<KeyValuePair<string, string>> Features { get; set; }
 
         /// <summary>
         /// Original hardware part name within an item
         /// </summary>
+        [JsonProperty("areaname")]
         public string AreaName { get; set; }
 
         /// <summary>
         /// Original hardware size within the part
         /// </summary>
+        [JsonProperty("areasize")]
         public long? AreaSize { get; set; }
 
         #endregion
@@ -533,26 +560,31 @@ namespace SabreTools.Library.DatItems
         /// <summary>
         /// Internal system ID for organization
         /// </summary>
+        [JsonIgnore]
         public int SystemID { get; set; }
 
         /// <summary>
         /// Internal system name for organization
         /// </summary>
+        [JsonIgnore]
         public string System { get; set; }
 
         /// <summary>
         /// Internal source ID for organization
         /// </summary>
+        [JsonIgnore]
         public int SourceID { get; set; }
 
         /// <summary>
         /// Internal source name for organization
         /// </summary>
+        [JsonIgnore]
         public string Source { get; set; }
 
         /// <summary>
         /// Flag if item should be removed
         /// </summary>
+        [JsonIgnore]
         public bool Remove { get; set; }
 
         #endregion
diff --git a/SabreTools.Library/DatItems/Disk.cs b/SabreTools.Library/DatItems/Disk.cs
index ee95c759..50b3fd52 100644
--- a/SabreTools.Library/DatItems/Disk.cs
+++ b/SabreTools.Library/DatItems/Disk.cs
@@ -3,6 +3,7 @@
 using SabreTools.Library.Data;
 using SabreTools.Library.FileTypes;
 using SabreTools.Library.Tools;
+using Newtonsoft.Json;
 
 namespace SabreTools.Library.DatItems
 {
@@ -27,6 +28,7 @@ namespace SabreTools.Library.DatItems
         /// <summary>
         /// Data MD5 hash
         /// </summary>
+        [JsonProperty("md5")]
         public string MD5
         {
             get { return _md5.IsNullOrWhiteSpace() ? null : Utilities.ByteArrayToString(_md5); }
@@ -36,6 +38,7 @@ namespace SabreTools.Library.DatItems
         /// <summary>
         /// Data RIPEMD160 hash
         /// </summary>
+        [JsonProperty("ripemd160")]
         public string RIPEMD160
         {
             get { return _ripemd160.IsNullOrWhiteSpace() ? null : Utilities.ByteArrayToString(_ripemd160); }
@@ -45,6 +48,7 @@ namespace SabreTools.Library.DatItems
         /// <summary>
         /// Data SHA-1 hash
         /// </summary>
+        [JsonProperty("sha1")]
         public string SHA1
         {
             get { return _sha1.IsNullOrWhiteSpace() ? null : Utilities.ByteArrayToString(_sha1); }
@@ -54,6 +58,7 @@ namespace SabreTools.Library.DatItems
         /// <summary>
         /// Data SHA-256 hash
         /// </summary>
+        [JsonProperty("sha256")]
         public string SHA256
         {
             get { return _sha256.IsNullOrWhiteSpace() ? null : Utilities.ByteArrayToString(_sha256); }
@@ -63,6 +68,7 @@ namespace SabreTools.Library.DatItems
         /// <summary>
         /// Data SHA-384 hash
         /// </summary>
+        [JsonProperty("sha384")]
         public string SHA384
         {
             get { return _sha384.IsNullOrWhiteSpace() ? null : Utilities.ByteArrayToString(_sha384); }
@@ -72,6 +78,7 @@ namespace SabreTools.Library.DatItems
         /// <summary>
         /// Data SHA-512 hash
         /// </summary>
+        [JsonProperty("sha512")]
         public string SHA512
         {
             get { return _sha512.IsNullOrWhiteSpace() ? null : Utilities.ByteArrayToString(_sha512); }
@@ -81,31 +88,37 @@ namespace SabreTools.Library.DatItems
         /// <summary>
         /// Disk name to merge from parent
         /// </summary>
+        [JsonProperty("merge")]
         public string MergeTag { get; set; }
 
         /// <summary>
         /// Disk region
         /// </summary>
+        [JsonProperty("region")]
         public string Region { get; set; }
 
         /// <summary>
         /// Disk index
         /// </summary>
+        [JsonProperty("index")]
         public string Index { get; set; }
 
         /// <summary>
         /// Disk writable flag
         /// </summary>
+        [JsonProperty("writable")]
         public bool? Writable { get; set; }
 
         /// <summary>
         /// Disk dump status
         /// </summary>
+        [JsonProperty("status")]
         public ItemStatus ItemStatus { get; set; }
 
         /// <summary>
         /// Determine if the disk is optional in the set
         /// </summary>
+        [JsonProperty("optional")]
         public bool? Optional { get; set; }
 
         #endregion
diff --git a/SabreTools.Library/DatItems/Machine.cs b/SabreTools.Library/DatItems/Machine.cs
index 79028323..89ab533b 100644
--- a/SabreTools.Library/DatItems/Machine.cs
+++ b/SabreTools.Library/DatItems/Machine.cs
@@ -2,6 +2,7 @@
 using System.Collections.Generic;
 
 using SabreTools.Library.Data;
+using Newtonsoft.Json;
 
 namespace SabreTools.Library.DatItems
 {
@@ -15,93 +16,111 @@ namespace SabreTools.Library.DatItems
         /// <summary>
         /// Name of the machine
         /// </summary>
+        [JsonProperty("name")]
         public string Name { get; set; }
 
         /// <summary>
         /// Additional notes
         /// </summary>
+        [JsonProperty("comment")]
         public string Comment { get; set; }
 
         /// <summary>
         /// Extended description
         /// </summary>
+        [JsonProperty("description")]
         public string Description { get; set; }
 
         /// <summary>
         /// Year(s) of release/manufacture
         /// </summary>
+        [JsonProperty("year")]
         public string Year { get; set; }
 
         /// <summary>
         /// Manufacturer, if available
         /// </summary>
+        [JsonProperty("manufacturer")]
         public string Manufacturer { get; set; }
 
         /// <summary>
         /// Publisher, if available
         /// </summary>
+        [JsonProperty("publisher")]
         public string Publisher { get; set; }
 
         /// <summary>
         /// fomof parent
         /// </summary>
+        [JsonProperty("romof")]
         public string RomOf { get; set; }
 
         /// <summary>
         /// cloneof parent
         /// </summary>
+        [JsonProperty("cloneof")]
         public string CloneOf { get; set; }
 
         /// <summary>
         /// sampleof parent
         /// </summary>
+        [JsonProperty("sampleof")]
         public string SampleOf { get; set; }
 
         /// <summary>
         /// Support status
         /// </summary>
         /// <remarks>yes = true, partial = null, no = false</remarks>
+        [JsonProperty("supported")]
         public bool? Supported { get; set; }
 
         /// <summary>
         /// Emulator source file related to the machine
         /// </summary>
+        [JsonProperty("sourcefile")]
         public string SourceFile { get; set; }
 
         /// <summary>
         /// Machine runnable status
         /// </summary>
         /// <remarks>yes = true, partial = null, no = false</remarks>
+        [JsonProperty("runnable")]
         public bool? Runnable { get; set; }
 
         /// <summary>
         /// Machine board name
         /// </summary>
+        [JsonProperty("board")]
         public string Board { get; set; }
 
         /// <summary>
         /// Rebuild location if different than machine name
         /// </summary>
+        [JsonProperty("rebuildto")]
         public string RebuildTo { get; set; }
 
         /// <summary>
         /// List of associated device names
         /// </summary>
+        [JsonProperty("devices")]
         public List<string> Devices { get; set; }
 
         /// <summary>
         /// List of slot options
         /// </summary>
+        [JsonProperty("slotoptions")]
         public List<string> SlotOptions { get; set; }
 
         /// <summary>
         /// List of info items
         /// </summary>
+        [JsonProperty("infos")]
         public List<KeyValuePair<string, string>> Infos { get; set; }
 
         /// <summary>
         /// Type of the machine
         /// </summary>
+        [JsonProperty("type")]
         public MachineType MachineType { get; set; }
 
         #endregion
diff --git a/SabreTools.Library/DatItems/Release.cs b/SabreTools.Library/DatItems/Release.cs
index a3b6349b..b73602e5 100644
--- a/SabreTools.Library/DatItems/Release.cs
+++ b/SabreTools.Library/DatItems/Release.cs
@@ -1,4 +1,5 @@
 using SabreTools.Library.Data;
+using Newtonsoft.Json;
 
 namespace SabreTools.Library.DatItems
 {
@@ -12,21 +13,25 @@ namespace SabreTools.Library.DatItems
         /// <summary>
         /// Release region(s)
         /// </summary>
+        [JsonProperty("region")]
         public string Region { get; set; }
 
         /// <summary>
         /// Release language(s)
         /// </summary>
+        [JsonProperty("language")]
         public string Language { get; set; }
 
         /// <summary>
         /// Date of release
         /// </summary>
+        [JsonProperty("date")]
         public string Date { get; set; }
 
         /// <summary>
         /// Default release, if applicable
         /// </summary>
+        [JsonProperty("default")]
         public bool? Default { get; set; }
 
         #endregion
diff --git a/SabreTools.Library/DatItems/Rom.cs b/SabreTools.Library/DatItems/Rom.cs
index 7d9996fe..ef477ed7 100644
--- a/SabreTools.Library/DatItems/Rom.cs
+++ b/SabreTools.Library/DatItems/Rom.cs
@@ -3,6 +3,7 @@
 using SabreTools.Library.Data;
 using SabreTools.Library.FileTypes;
 using SabreTools.Library.Tools;
+using Newtonsoft.Json;
 
 namespace SabreTools.Library.DatItems
 {
@@ -28,16 +29,19 @@ namespace SabreTools.Library.DatItems
         /// <summary>
         /// What BIOS is required for this rom
         /// </summary>
+        [JsonProperty("bios")]
         public string Bios { get; set; }
 
         /// <summary>
         /// Byte size of the rom
         /// </summary>
+        [JsonProperty("size")]
         public long Size { get; set; }
 
         /// <summary>
         /// File CRC32 hash
         /// </summary>
+        [JsonProperty("crc")]
         public string CRC
         {
             get { return _crc.IsNullOrWhiteSpace() ? null : Utilities.ByteArrayToString(_crc); }
@@ -47,6 +51,7 @@ namespace SabreTools.Library.DatItems
         /// <summary>
         /// File MD5 hash
         /// </summary>
+        [JsonProperty("md5")]
         public string MD5
         {
             get { return _md5.IsNullOrWhiteSpace() ? null : Utilities.ByteArrayToString(_md5); }
@@ -56,6 +61,7 @@ namespace SabreTools.Library.DatItems
         /// <summary>
         /// File RIPEMD160 hash
         /// </summary>
+        [JsonProperty("ripemd160")]
         public string RIPEMD160
         {
             get { return _ripemd160.IsNullOrWhiteSpace() ? null : Utilities.ByteArrayToString(_ripemd160); }
@@ -65,6 +71,7 @@ namespace SabreTools.Library.DatItems
         /// <summary>
         /// File SHA-1 hash
         /// </summary>
+        [JsonProperty("sha1")]
         public string SHA1
         {
             get { return _sha1.IsNullOrWhiteSpace() ? null : Utilities.ByteArrayToString(_sha1); }
@@ -74,6 +81,7 @@ namespace SabreTools.Library.DatItems
         /// <summary>
         /// File SHA-256 hash
         /// </summary>
+        [JsonProperty("sha256")]
         public string SHA256
         {
             get { return _sha256.IsNullOrWhiteSpace() ? null : Utilities.ByteArrayToString(_sha256); }
@@ -83,6 +91,7 @@ namespace SabreTools.Library.DatItems
         /// <summary>
         /// File SHA-384 hash
         /// </summary>
+        [JsonProperty("sha384")]
         public string SHA384
         {
             get { return _sha384.IsNullOrWhiteSpace() ? null : Utilities.ByteArrayToString(_sha384); }
@@ -92,6 +101,7 @@ namespace SabreTools.Library.DatItems
         /// <summary>
         /// File SHA-512 hash
         /// </summary>
+        [JsonProperty("sha512")]
         public string SHA512
         {
             get { return _sha512.IsNullOrWhiteSpace() ? null : Utilities.ByteArrayToString(_sha512); }
@@ -101,31 +111,37 @@ namespace SabreTools.Library.DatItems
         /// <summary>
         /// Rom name to merge from parent
         /// </summary>
+        [JsonProperty("merge")]
         public string MergeTag { get; set; }
 
         /// <summary>
         /// Rom region
         /// </summary>
+        [JsonProperty("region")]
         public string Region { get; set; }
 
         /// <summary>
         /// Data offset within rom
         /// </summary>
+        [JsonProperty("offset")]
         public string Offset { get; set; }
 
         /// <summary>
         /// File created date
         /// </summary>
+        [JsonProperty("date")]
         public string Date { get; set; }
 
         /// <summary>
         /// Rom dump status
         /// </summary>
+        [JsonProperty("status")]
         public ItemStatus ItemStatus { get; set; }
 
         /// <summary>
         /// Determine if the rom is optional in the set
         /// </summary>
+        [JsonProperty("optional")]
         public bool? Optional { get; set; }
 
         #endregion
diff --git a/SabreTools.Library/SabreTools.Library.csproj b/SabreTools.Library/SabreTools.Library.csproj
index 0e231743..569ddcb5 100644
--- a/SabreTools.Library/SabreTools.Library.csproj
+++ b/SabreTools.Library/SabreTools.Library.csproj
@@ -59,6 +59,7 @@
 
   <ItemGroup>
     <PackageReference Include="Mono.Data.Sqlite.Portable" Version="1.0.3.5" />
+    <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
     <PackageReference Include="SevenZipSharp.Net45" Version="1.0.19" />
     <PackageReference Include="SharpCompress" Version="0.25.1" />
     <PackageReference Include="System.ValueTuple" Version="4.5.0" />