Claude Sign In Not Working – How to Fix
Try incognito mode, clear cookies for Claude/Anthropic, disable extensions, and retry. If you use Sign in with Google/Apple, re-authorize the provider and check for outages.
Step-by-Step Fix
Claude sign-in issues are usually caused by browser session problems or blocked authentication redirects. Try these fixes in order:
1. Use Incognito / Private Mode
- Open an incognito window
- Go to Claude sign-in again
- Try signing in without any extensions running
2. Clear Cookies and Site Data
- Clear cookies for Claude/Anthropic domains
- Close and reopen the browser
- Try signing in again
3. Disable Browser Extensions
Extensions that commonly break auth flows:
- Ad blockers
- Script blockers
- Privacy/anti-tracking extensions
Disable them temporarily and retry.
4. Try a Different Sign-In Method
If available, switch between:
- Sign in with Google
- Sign in with Apple
- Email sign-in (if supported)
5. Switch Browser or Network
- Try Chrome ↔ Safari ↔ Edge
- Try mobile hotspot (to rule out network filtering)
6. Check for Service Outages
If Claude or the auth provider has an outage, sign-in may fail temporarily. Wait a few minutes and retry.
7. Contact Support
If none of the steps work, capture:
- exact error message
- time + timezone
- sign-in method used (Google/Apple/email)
and contact support.
Common Mistakes to Avoid
- Troubleshooting the wrong account or workspace.
- Retrying without checking whether there is an active outage or plan restriction.
- Clearing local state only after multiple failed attempts instead of testing in a clean browser first.
What to Gather Before Contacting Support
- Capture the exact error message and the time it happened.
- Record whether the issue happens on another browser, device, or network.
- Note which account, workspace, or subscription plan is affected.
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