diff --git a/tools/arch_diagram/gen_memory_svg.py b/tools/arch_diagram/gen_memory_svg.py
index f6e53116..58e36690 100644
--- a/tools/arch_diagram/gen_memory_svg.py
+++ b/tools/arch_diagram/gen_memory_svg.py
@@ -365,7 +365,7 @@ def main():
     for filename, gen_func in targets:
         path = os.path.join(out_dir, filename)
         svg = gen_func()
-        with open(path, "w", encoding="utf-8") as f:
+        with open(path, "w", encoding="utf-8", newline="\n") as f:
             f.write(svg)
         print(f"OK: {filename} ({len(svg)} bytes)")
 
diff --git a/tools/arch_diagram/gen_net_pending_svg.py b/tools/arch_diagram/gen_net_pending_svg.py
index 3387fdb9..a9fd381d 100644
--- a/tools/arch_diagram/gen_net_pending_svg.py
+++ b/tools/arch_diagram/gen_net_pending_svg.py
@@ -284,13 +284,13 @@ def build():
            'viewBox="0 0 %d %d" font-family="%s">' % (W, H, W, H, FONT)]
     svg.extend(out)
     svg.append('</svg>')
-    return "\n".join(svg)
+    return "\n".join(svg) + "\n"
 
 
 def main():
     svg = build()
     os.makedirs(os.path.dirname(OUT), exist_ok=True)
-    with open(OUT, "w", encoding="utf-8") as f:
+    with open(OUT, "w", encoding="utf-8", newline="\n") as f:
         f.write(svg)
     print("已生成: %s (%d bytes)" % (OUT, len(svg.encode("utf-8"))))