Claude Login Not Working: How to Fix

Claude sign-in problems usually fall into three groups: the email link never arrives, the login loops back to the same screen, or the verification code is rejected. Each has a different fix.

1. Confirm the service is up

A sign-in loop during an incident is not your account's fault. Check current Claude status before changing anything.

2. Magic link never arrives

Check spam and promotions folders, then search your mailbox for the sender domain. Corporate mail filters frequently quarantine login links. Request one new link only — older links are invalidated each time you request another.

3. Login loops back to the sign-in page

This is a cookie problem. Allow third-party cookies for claude.ai, disable strict tracking protection for the site, then retry. Private windows with blocking enabled will loop indefinitely.

4. Google or SSO sign-in fails

Sign out of all Google accounts, then sign in with the single account tied to your Claude subscription. Mixed sessions are the usual cause of "account not found" after an otherwise successful Google prompt.

5. Verification code rejected

Codes expire quickly and are single-use. Make sure your device clock is set automatically, then request a fresh code and enter it immediately.

6. Still locked out

If sign-in fails on every device and network, treat it as an account issue rather than an app issue — see Claude not responding and Claude billing problems if your plan recently lapsed.