I created (with Claude code's help) a page to compare two texts --- to allow teachers to see exactly how a modified reading is different from the original. Many LLMs do not do a great job of modifying texts in the ways that teachers ask for. The "Reading Modification Analyzer" compares two texts and shows helpful data on how they differ.
The analyzer is at: https://spackman-chris.neocities.org/text-compare/text-compare
As always, feedback and suggestions are most welcome.