Enhance Your AO3 Reading Experience

AO3 Advanced Marker is a clean, browser extension designed to elevate how you read, organize, and track your favorite works on Archive of Our Own. Sync your bookmarks, highlights, and history seamlessly.

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AO3 Advanced Marker Dashboard Options

Designed for Avid Readers

Enjoy a host of modern features tailored specifically to optimize your browsing and reading habits on Archive of Our Own.

Reading Progress Sync

Automatically bookmarks your reading position. Pick up exactly where you left off on multi-chapter fanfics, whether you are on desktop or mobile.

Want to Read Queue

Organize your reading list dynamically. Mark works as "Want to Read" and access your customized queue directly from the AO3 header menu.

Highlights & Notes

Highlight your favorite lines, reactions, or dialogue directly within the work. Add personal notes that persist on the page for future re-reads.

Secure & Private Cloud Backup

We believe your reading habits should remain private. Unlike other extensions, AO3 Advanced Marker does not utilize central servers to store your data. Instead, it utilizes your personal cloud storage.

  • Direct Sync: Syncs bookmarks, highlights, and history directly with your Google Drive.
  • App-Specific Access: Only accesses its own dedicated app folder inside your Drive. It cannot view, edit, or delete any other files.
  • Strict Privacy: No personal details, passwords, or browsing data are ever collected, sold, or shared with third parties.
Read Full Privacy Policy
Google Drive Verified
Fully compliant with Google API OAuth 2.0 security policies and limited use guidelines.