diff --git a/Utilities/LibMatrix.E2eeTestKit/Pages/CSTJApiComparison.razor b/Utilities/LibMatrix.E2eeTestKit/Pages/CSTJApiComparison.razor
new file mode 100644
index 0000000..3aad27c
--- /dev/null
+++ b/Utilities/LibMatrix.E2eeTestKit/Pages/CSTJApiComparison.razor
@@ -0,0 +1,134 @@
+@page "/CSTJApiComparison"
+@using System.Reflection
+@using System.Text
+@using System.Text.Json
+@using LibMatrix.Extensions
+
+<PageTitle>Counter</PageTitle>
+
+<h3>Compare STJ API</h3>
+
+// side by side table
+<table class="table table-bordered">
+ <thead>
+ <tr>
+ @foreach (var type in TypesToCompare) {
+ <th>@type.Name</th>
+ }
+ </tr>
+ </thead>
+ <tbody>
+ @* // display all public static methods in matching rows, put non matching at the end, by signature *@
+ @* // do not use type.GetMethod as it throws ambiguous match errors *@
+ @{ var methods = TypesToCompare.Select(t => (Type: t, Methods: t.GetMethods())); }
+ @foreach (var method in methods.SelectMany(m => m.Methods).DistinctBy(m => GetMethodSignature(m))) {
+ <tr>
+ @foreach (var (type, _) in methods) {
+ var methodInfo = type.GetMethods().FirstOrDefault(m => GetMethodSignature(m) == GetMethodSignature(method));
+ if (methodInfo != null) {
+ <td>@GetMethodSignature(methodInfo)</td>
+ }
+ else {
+ <td></td>
+ }
+ }
+ </tr>
+ }
+
+ </tbody>
+</table>
+
+@code {
+ private static readonly Type[] TypesToCompare = [typeof(JsonSerializer), typeof(CanonicalJsonSerializer)];
+
+ private string GetMethodSignature(MethodInfo method, bool includeModifiers = true, bool includeReturnType = true, bool includeParameters = true) {
+ var sb = new StringBuilder();
+
+ //modifiers
+ if (includeModifiers) {
+ if (method.IsPublic) {
+ sb.Append("public ");
+ }
+ if (method.IsStatic) {
+ sb.Append("static ");
+ }
+ }
+
+ //return type
+ if (includeReturnType) {
+ if (method.ReturnType.IsGenericType) {
+ sb.Append(method.ReturnType.Name.Split('`')[0]);
+ sb.Append("<");
+ var genericArguments = method.ReturnType.GetGenericArguments();
+ foreach (var genericArgument in genericArguments) {
+ sb.Append(genericArgument.Name);
+ if (genericArgument != genericArguments.Last())
+ sb.Append(", ");
+ }
+
+ sb.Append(">");
+ }
+ else {
+ //lowercase primitives
+ sb.Append(method.ReturnType.Name);
+ }
+
+ sb.Append(' ');
+ }
+
+ sb.Append(method.Name);
+ if (method.IsGenericMethod) {
+ sb.Append("<");
+ var genericArguments = method.GetGenericArguments();
+ foreach (var genericArgument in genericArguments) {
+ sb.Append(genericArgument.Name);
+ if (genericArgument != genericArguments.Last())
+ sb.Append(", ");
+ }
+
+ sb.Append(">");
+ }
+ sb.Append("(");
+ var parameters = method.GetParameters();
+ foreach (var parameter in parameters) {
+ //handle generics
+ if (parameter.ParameterType.IsGenericType) {
+ sb.Append(parameter.ParameterType.Name.Split('`')[0]);
+ sb.Append("<");
+ var genericArguments = parameter.ParameterType.GetGenericArguments();
+ foreach (var genericArgument in genericArguments) {
+ sb.Append(genericArgument.Name);
+ if (genericArgument != genericArguments.Last())
+ sb.Append(", ");
+ }
+
+ sb.Append(">");
+ }
+ else {
+ sb.Append(parameter.ParameterType.Name);
+ }
+ sb.Append(" ");
+ sb.Append(parameter.Name);
+ if (parameter.HasDefaultValue) {
+ sb.Append(" = ");
+ //handle default value
+ if (parameter.DefaultValue == null) {
+ sb.Append("null");
+ }
+ else if (parameter.ParameterType == typeof(string)) {
+ sb.Append($"\"{parameter.DefaultValue}\"");
+ }
+ else {
+ sb.Append(parameter.DefaultValue);
+ }
+ }
+
+ if (parameter != parameters.Last())
+ sb.Append(", ");
+ }
+
+ sb.Append(")");
+ return sb.ToString();
+ }
+
+}
\ No newline at end of file
diff --git a/Utilities/LibMatrix.E2eeTestKit/Pages/CSTJTest.razor b/Utilities/LibMatrix.E2eeTestKit/Pages/CSTJTest.razor
new file mode 100644
index 0000000..0d01428
--- /dev/null
+++ b/Utilities/LibMatrix.E2eeTestKit/Pages/CSTJTest.razor
@@ -0,0 +1,39 @@
+@page "/CSTJTest"
+@using System.Text.Json
+@using System.Text.Json.Nodes
+@using LibMatrix.Extensions
+
+<PageTitle>Counter</PageTitle>
+
+<h3>Canonicalise JSON</h3>
+<hr/>
+
+<InputTextArea @bind-Value="@JsonInput" rows="@(JsonInput.Split('\n').Length + 1)"></InputTextArea>
+<br/>
+<pre>@JsonOutput</pre>
+
+@code {
+ private string _jsonInput = "";
+
+ private string JsonInput {
+ get => _jsonInput;
+ set {
+ _jsonInput = value;
+ try {
+ Console.WriteLine("Input updated");
+ var obj = JsonSerializer.Deserialize<dynamic>(value);
+ Console.WriteLine("Deserialised");
+ JsonOutput = CanonicalJsonSerializer.Serialize(obj);
+ Console.WriteLine("Serialised: " + JsonOutput ?? "null");
+ }
+ catch (Exception e) {
+ JsonOutput = e.ToString();
+ }
+
+ StateHasChanged();
+ }
+ }
+
+ private string? JsonOutput { get; set; }
+
+}
\ No newline at end of file
diff --git a/Utilities/LibMatrix.E2eeTestKit/Pages/Home.razor b/Utilities/LibMatrix.E2eeTestKit/Pages/Home.razor
new file mode 100644
index 0000000..df05023
--- /dev/null
+++ b/Utilities/LibMatrix.E2eeTestKit/Pages/Home.razor
@@ -0,0 +1,7 @@
+@page "/"
+
+<PageTitle>Home</PageTitle>
+
+<h1>Hello, world!</h1>
+
+Welcome to your new app.
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