diff --git a/services/web/frontend/js/features/source-editor/hunspell/wasm/README.md b/services/web/frontend/js/features/source-editor/hunspell/wasm/README.md
new file mode 100644
index 0000000000..317c7031c5
--- /dev/null
+++ b/services/web/frontend/js/features/source-editor/hunspell/wasm/README.md
@@ -0,0 +1,7 @@
+# Hunspell
+
+The files in this directory are:
+
+* `hunspell.wasm`: [Hunspell](https://github.com/hunspell/hunspell) compiled to WebAssembly using Emscripten, via the [build.sh](../build.sh) script.
+* `hunspell.mjs`: a JavaScript wrapper for the WebAssembly module, generated by Emscripten.
+* `hunspell.d.ts`: manually-created types for the exports from the JavaScript module.