diff --git a/README.md b/README.md
index fdab5d0..4a15268 100644
--- a/README.md
+++ b/README.md
@@ -51,6 +51,7 @@ docker pull jiisanda/docflow
 | Authorization and Authentication |                                                                  |
 | Access Control List              |                                                                  |
 | Deletion and Archiving           |                                                                  |
+| Document Preview                 | [Detail](https://github.com/jiisanda/docflow#-document-preview)  |
 | Send File via Email              |                                                                  |
 | Conversion to PDF                |                                                                  |
 | Full Text Search                 |                                                                  |
@@ -81,6 +82,14 @@ Learn how to share documents in DocFlow:
 
 For detailed instructions, visit the [Document Sharing Documentation]().
 
+### 👀 Document Preview
+
+Here's how preview of docs works in DocFlow.
+
+![preview-document](docs/imgs/document/document_preview.png)
+
+For detailed instructions, visit the [Document Preview Documentation](https://github.com/jiisanda/docflow/blob/master/docs/features/preview.md)
+
 ## 📜 License
 
 [![Licence](https://img.shields.io/github/license/Ileriayo/markdown-badges?style=for-the-badge)](./LICENSE)
diff --git a/TODO.md b/TODO.md
index ebb0b3a..bf75b5c 100644
--- a/TODO.md
+++ b/TODO.md
@@ -18,7 +18,7 @@
 - ✅ User Authentication
 - ✅ Access Control List (ACL)
 - ✅ Document Deletion and Archiving
-- 🟥 Document Preview
+- ✅ Document Preview
 - 🟥 Send File via Email
 - 🟥 Text Analysis
 - 🟥 Conversion to PDF