diff --git a/attributed_text/lib/src/attributed_spans.dart b/attributed_text/lib/src/attributed_spans.dart
index 5f714d779..3333f24ce 100644
--- a/attributed_text/lib/src/attributed_spans.dart
+++ b/attributed_text/lib/src/attributed_spans.dart
@@ -1038,9 +1038,22 @@ class AttributionSpan {
   });
 
   final Attribution attribution;
+
+  /// The start of the span, inclusive.
+  ///
+  /// Content at this index will have [attribution] applied.
   final int start;
+
+  /// The end of the span, exclusive.
+  ///
+  /// Content at this index will _not_ have [attribution] applied.
   final int end;
 
+  /// The end of the span, inclusive.
+  ///
+  /// Content at this index will have [attribution] applied.
+  int get endIndex => end - 1;
+
   AttributionSpan constrain({
     required int start,
     required int end,
@@ -1093,9 +1106,22 @@ class MultiAttributionSpan {
   });
 
   final Set<Attribution> attributions;
+
+  /// The start of the span, inclusive.
+  ///
+  /// Content at this index will have [attributions] applied.
   final int start;
+
+  /// The end of the span, exclusive.
+  ///
+  /// Content at this index will _not_ have [attributions] applied.
   final int end;
 
+  /// The end of the span, inclusive.
+  ///
+  /// Content at this index will have [attributions] applied.
+  int get endIndex => end - 1;
+
   MultiAttributionSpan copyWith({
     Set<Attribution>? attributions,
     int? start,