diff --git a/main.py b/main.py
old mode 100644
new mode 100755
index 1a2805c..21012ec
--- a/main.py
+++ b/main.py
@@ -1,3 +1,5 @@
+#!/usr/bin/python3
+
 import os
 import re
 import json
@@ -288,6 +290,13 @@ def regenerate_files(config):
         # rewrite HTML
         generate_html_for_item(config, item_json, regenerate=True)
 
+def clear_data(config):
+    for json_path in config.json_root.glob("*.json"):
+        item_json = json.load(json_path.open("r"))
+        remove_html_for_item(config, item_json, ignore_deleted=True)
+        json_path.unlink()
+    remove_empty_html_directories(config)
+
 #%% Run feather
 
 def main():
@@ -296,8 +305,8 @@ def main():
         description="file-based RSS reader"
     )
     parser.add_argument(
-        "action", choices=("sync", "sync-up", "sync-down", "daemon", "regenerate"),
-        help="sync: perform a full synchronization with the server; sync-up: only synchronize local changes to the server (e.g. items read locally); sync-down: only synchronize remote change from the server (e.g. new items or items read from another device); daemon: start in daemon mode (will keep performing synchronizations periodically until process is stopped); regenerate: regenerate all HTML files from the local data"
+        "action", choices=("sync", "sync-up", "sync-down", "daemon", "regenerate", "clear-data"),
+        help="sync: perform a full synchronization with the server; sync-up: only synchronize local changes to the server (e.g. items read locally); sync-down: only synchronize remote change from the server (e.g. new items or items read from another device); daemon: start in daemon mode (will keep performing synchronizations periodically until process is stopped); regenerate: regenerate all HTML files from the local data; clear-data: remove all local data"
     )
     args = parser.parse_args()
 
@@ -319,6 +328,8 @@ def main():
             pass
     elif args.action == "regenerate":
         regenerate_files(config)
+    elif args.action == "clear-data":
+        clear_data(config)
 
 if __name__ == "__main__":
     main()