diff --git a/SharpNBT/EndianExtensions.cs b/SharpNBT/NumberExtensions.cs
similarity index 89%
rename from SharpNBT/EndianExtensions.cs
rename to SharpNBT/NumberExtensions.cs
index 8436ca8..9def7af 100644
--- a/SharpNBT/EndianExtensions.cs
+++ b/SharpNBT/NumberExtensions.cs
@@ -8,7 +8,7 @@ namespace SharpNBT;
 /// Contains extension methods dealing with endianness of numeric types.
 /// </summary>
 [PublicAPI]
-public static class EndianExtensions
+public static class NumberExtensions
 {
     /// <summary>
     /// Swap the endian of the given <paramref name="value"/>.
@@ -71,4 +71,13 @@ public static class EndianExtensions
         var n = BitConverter.DoubleToInt64Bits(value);
         return BitConverter.Int64BitsToDouble(n.SwapEndian());
     }
+
+    public static bool IsValidUnquoted(this char c)
+    {
+        return c == '_' || c == '-' ||
+               c == '.' || c == '+' ||
+               c >= '0' && c <= '9' ||
+               c >= 'A' && c <= 'Z' ||
+               c >= 'a' && c <= 'z';
+    }
 }
\ No newline at end of file
diff --git a/SharpNBT/SNBT/StringNbt.cs b/SharpNBT/SNBT/StringNbt.cs
index 3619ff9..b9b2383 100644
--- a/SharpNBT/SNBT/StringNbt.cs
+++ b/SharpNBT/SNBT/StringNbt.cs
@@ -175,7 +175,7 @@ public static class StringNbt
         var start = scanner.Position;
         for (var length = 0; scanner.MoveNext(false, true); length++)
         {
-            if (AllowedInUnquoted(scanner.Current))
+            if (scanner.Current.IsValidUnquoted())
                 continue;
 
             // Step back one character so not to consume the one that failed the permission check.
@@ -365,15 +365,6 @@ public static class StringNbt
         return values;
     }
     
-    private static bool AllowedInUnquoted(char c)
-    {
-        return c == '_' || c == '-' ||
-               c == '.' || c == '+' ||
-               c >= '0' && c <= '9' ||
-               c >= 'A' && c <= 'Z' ||
-               c >= 'a' && c <= 'z';
-    }
-    
     private const StringSplitOptions SplitOpts = StringSplitOptions.TrimEntries | StringSplitOptions.RemoveEmptyEntries;
     private static readonly char[] SplitSeparators = new[] { ',', 'b', 'B', 'l', 'L' };
 }
\ No newline at end of file