diff --git a/README.md b/README.md
index 7706263d..a04dbaf7 100644
--- a/README.md
+++ b/README.md
@@ -175,6 +175,10 @@ To start coding, the easiest way is load the `goldendict.pro` file to Qt Creator
 
 check the document [how to use clang-format](howto/how%20to%20use%20.clang-format%20to%20format%20the%20code.md)
 
+## Online document
+
+[document](https://xiaoyifang.github.io/goldendict/)
+
 ## Support
 
 Bug reporting: [GoldenDict issue tracker](https://github.com/xiaoyifang/goldendict/issues)