diff --git a/web/src/lib/downloadBlob.ts b/web/src/lib/downloadBlob.ts
new file mode 100644
index 0000000..8614abf
--- /dev/null
+++ b/web/src/lib/downloadBlob.ts
@@ -0,0 +1,8 @@
+export function downloadBlob(filename: string, content: string, mimeType = "text/plain") {
+  const blob = new Blob([content], { type: mimeType });
+  const a = document.createElement("a");
+  a.href = URL.createObjectURL(blob);
+  a.download = filename;
+  a.click();
+  URL.revokeObjectURL(a.href);
+}