To protect your account and data, you should use official links provided by the Organization for Transformative Works (OTW) . Many "unofficial" mirrors are actually proxy sites that can see your login credentials.
Navigating AO3 Mirror Links: How to Access Your Favorite Fanfics Anytime ao3 mirror link
(Official Mirror - popular for bypassing filters) To protect your account and data, you should
Visit the official AO3_Status Twitter/X account for real-time updates on outages. Official AO3 proxies are required to display a
Official AO3 proxies are required to display a banner at the top of the page warning you that you are not on the main site. If a mirror looks like a "clone" with no warning, avoid it. Staying Connected
According to the official AO3 FAQ on Accessing Fanworks, the following are official and safe URLs: (Primary Domain)
Many readers use tools like FicHub or the AO3 "Download" button to save stories as EPUB or PDF files ahead of time.