diff --git a/Start/Shared/BookmarkContainerDto.cs b/Start/Shared/BookmarkContainerDto.cs
new file mode 100644
index 0000000..73a0eb9
--- /dev/null
+++ b/Start/Shared/BookmarkContainerDto.cs
@@ -0,0 +1,26 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+
+namespace Start.Shared {
+	public class BookmarkContainerDto {
+		public int BookmarkContainerId { get; set; }
+		[StringLength(300)]
+		public string Title { get; set; }
+
+		public IList<BookmarkGroupDto>? BookmarkGroups { get; set; }
+
+		public BookmarkContainerDto(string title) {
+			this.Title = title;
+		}
+
+		public BookmarkContainerDto(int bookmarkContainerId, string title) : this(title) {
+			this.BookmarkContainerId = bookmarkContainerId;
+		}
+
+		public BookmarkContainerDto(int bookmarkContainerId, string title,
+			IList<BookmarkGroupDto> bookmarkGroups) : this(bookmarkContainerId, title) {
+			this.BookmarkGroups = bookmarkGroups;
+		}
+	}
+}
diff --git a/Start/Shared/BookmarkDto.cs b/Start/Shared/BookmarkDto.cs
new file mode 100644
index 0000000..04ce10d
--- /dev/null
+++ b/Start/Shared/BookmarkDto.cs
@@ -0,0 +1,25 @@
+using System;
+using System.ComponentModel.DataAnnotations;
+
+namespace Start.Shared {
+	public class BookmarkDto {
+		public int BookmarkId { get; set; }
+		[StringLength(300)]
+		public string Title { get; set; }
+		[StringLength(2000)]
+		public string Url { get; set; }
+		[StringLength(5000)]
+		public string? Notes { get; set; }
+
+		public BookmarkDto(string title, string url, string? notes) {
+			this.Title = title;
+			this.Url = url;
+			this.Notes = notes;
+		}
+
+		public BookmarkDto(int bookmarkId, string title, string url, string? notes)
+			: this(title, url, notes) {
+			this.BookmarkId = bookmarkId;
+		}
+	}
+}
diff --git a/Start/Shared/BookmarkGroupDto.cs b/Start/Shared/BookmarkGroupDto.cs
new file mode 100644
index 0000000..cfafd4e
--- /dev/null
+++ b/Start/Shared/BookmarkGroupDto.cs
@@ -0,0 +1,30 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+
+namespace Start.Shared {
+	public class BookmarkGroupDto {
+		public int BookmarkGroupId { get; set; }
+		[StringLength(300)]
+		public string Title { get; set; }
+		[StringLength(6)]
+		public string Color { get; set; }
+
+		public IList<BookmarkDto>? Bookmarks { get; set; }
+
+		public BookmarkGroupDto(string title, string color) {
+			this.Title = title;
+			this.Color = color;
+		}
+
+		public BookmarkGroupDto(int bookmarkGroupId, string title, string color)
+			: this(title, color) {
+			this.BookmarkGroupId = bookmarkGroupId;
+		}
+
+		public BookmarkGroupDto(int bookmarkGroupId, string title, string color,
+			IList<BookmarkDto> bookmarks) : this(bookmarkGroupId, title, color) {
+			this.Bookmarks = bookmarks;
+		}
+	}
+}