Welcome to amendiff. Text is diffed entirely inside this page (WebAssembly) and is never sent
anywhere; the network tab stays empty while you type. Deletions appear like {this}, struck
through; insertions like `this´, underlined. Only the page itself is fetched, once,
over plain local HTTP — your pasted text never travels. On an untrusted network that one
page-fetch could in principle be tampered with, so for confidential work save this page
(Ctrl+S — it is a single self-contained HTML file) and open the saved copy directly from
disk: it works fully offline, no server needed.
⚠️ Confidentiality: REMOVE or disable all spelling/grammar browser
extensions (LanguageTool, Grammarly, …) before pasting confidential text. They read the
paste boxes and send their contents to their own servers, bypassing everything this page
does to keep text local. An extension badge or arrow appearing inside the paste boxes is
the tell-tale. The browser's built-in basic spell check is fine (it stays on this
machine); keep any "enhanced"/cloud spell check off too.