AO3 Kudos Checker

AO3 Kudos Checker adds a small status badge next to every work title on Archive of Our Own, letting you check whether you've left kudos on a fic — even without being logged in.

Simply enter your AO3 username (or multiple usernames) in the extension popup, then click the ◎ badge next to any work to trigger a check. The extension scans the work's public kudos pages, stops as soon as it finds a match, and saves the result locally so each work only needs to be checked once.

Features:

• Works on listing pages, search results, user pages, and individual work pages
• Supports multiple usernames (useful if you have alt accounts)
• Results are cached locally — no repeat scanning
• Rate-limited requests to be considerate of AO3's servers
• Works while logged out — uses public kudos pages only
• Light and dark mode support. ‎ Limitations:
• Can only scan 1 work at a time and works with over 4k kudos will take some time
• Guest kudos are anonymous and cannot be detected
• Works with login-locked fics only if you are logged into AO3 in your browser
• Large works with many kudos may take a moment to scan