Why Claude Login Fails
Claude supports exactly three login methods: email and password, Google OAuth, and Apple ID. The vast majority of login failures come down to three root causes: using the wrong method for your account type, corrupted browser session data, or a temporary issue with Anthropic's authentication service.
The single most important thing to know: using the wrong login method always fails, even if the email address is correct. If you registered with Google, you cannot log in with an email and password. There is no password to use — the account does not have one.
Step-by-Step Fix
1. Check Anthropic's System Status
Visit status.anthropic.com before doing anything else. If Anthropic's authentication services are experiencing an incident, no local troubleshooting will restore access. Anthropic posts status updates within minutes of incidents starting. If you see a yellow or red status for authentication services, wait 15–30 minutes and retry.
2. Confirm Your Login Method
On the login page at claude.ai/login, you have three options:
- Continue with Google — Use this if you registered with a Gmail or Google Workspace account
- Sign in with Apple — Use this if you registered using an Apple ID
- Email and password — Use this only if you explicitly set a password when you registered
If you are unsure which method you used, try the "Forgot password" link. Enter your email and submit the form. If you receive a password reset email from noreply@anthropic.com, you have a direct email/password account. If you do not receive anything within 10 minutes, your account uses Google or Apple — use the corresponding button on the login page.
3. Fix Google OAuth Login Issues
If you use "Continue with Google" and it is failing:
- Make sure you are selecting the correct Google account — if you have multiple Google accounts signed into Chrome, it is easy to click the wrong one
- Go to myaccount.google.com → Security → Third-party apps with account access and confirm Claude/Anthropic is still listed
- If Claude is not listed, you may have revoked access — click through the "Continue with Google" flow again to re-authorize
- If you get an error during the Google OAuth popup, try disabling browser extensions first and retrying
4. Fix Apple ID Login Issues
If "Sign in with Apple" is failing:
- Go to appleid.apple.com → Sign-In and Security → Apps Using Apple ID and confirm Claude is listed
- If you used the "Hide My Email" option when signing up, verify the relay address is still active — Apple occasionally deactivates these when account settings change
- Check that pop-ups are allowed for claude.ai in your browser — Apple Sign In uses a popup window that gets blocked by pop-up blockers
- On iOS Safari, make sure you are logged into your Apple ID in Settings and that "Sign in with Apple" is not restricted in Screen Time settings
5. Fix Email and Password Login Issues
If you are using email and password and it is failing:
- Double-check that you are typing the exact email address you registered with — including any periods or plus signs in Gmail addresses
- Use "Forgot password" to reset your password if you cannot remember it
- Check that your caps lock key is not on when typing the password
- If you have a password manager, make sure it is autofilling the correct credentials for claude.ai specifically (not a cached version for a different site)
6. Clear Claude Cookies and Session Data
Corrupted session data in your browser causes a large share of login issues, including redirect loops, blank screens, and login forms that submit but do nothing:
- Go to your browser settings → Privacy → Cookies and site data
- Search for claude.ai and anthropic.com
- Delete all stored data for both domains
- Close the browser completely (all windows, not just the tab)
- Reopen the browser and go to claude.ai/login
On Chrome: Settings → Privacy and security → Cookies and other site data → See all site data → search for "claude" and "anthropic" → delete each.
On Firefox: Settings → Privacy & Security → Cookies and Site Data → Manage Data → search and remove.
On Safari: Develop menu → Empty Caches, then Preferences → Privacy → Manage Website Data → search and remove.
7. Test in Incognito Mode With Extensions Disabled
Open a private or incognito window and navigate to claude.ai/login. Incognito mode disables most installed extensions and uses no cached data from your regular session.
- If login works in incognito: a browser extension is blocking authentication. Return to regular mode and disable all extensions, then re-enable them one at a time to find the culprit. Common offenders: uBlock Origin, Privacy Badger, Ghostery, HTTPS Everywhere, and any corporate security extensions.
- If login fails in incognito too: the issue is your network, your account status, or Anthropic's servers — not your browser.
8. Check Your Verification Code Email
Claude sends a one-time verification code to your email address during some login flows, particularly when logging in from a new device or after a long time away. If the code is not arriving:
- Check your spam and junk folders for email from noreply@anthropic.com — this address is frequently treated as spam
- Wait 5 full minutes — do not click resend repeatedly, as multiple rapid requests can cause rate limiting
- Confirm you are checking the inbox for the exact email address you registered with
- For iCloud Mail users: log into iCloud webmail directly rather than using an email client — the mail app can sometimes delay delivery
- For Microsoft 365 / Outlook users: check your quarantine folder at security.microsoft.com
- If still nothing after 10 minutes, request one new code and wait again
The verification code from Anthropic expires after 15 minutes. If you receive the code but get an error when entering it, request a fresh code.
9. Switch Networks
Corporate networks, university networks, and some ISPs block Anthropic's authentication endpoints. The authentication server at auth.anthropic.com may be on a blocklist. Test by switching to your mobile phone's hotspot. If login succeeds on the hotspot but not on your regular network:
- On a corporate or school network: contact your IT department and request that auth.anthropic.com be whitelisted
- On a home network: try restarting your router, and check whether your ISP or router has parental controls or content filtering enabled
10. Try a Different Browser
If Chrome is failing, install and try Firefox, Safari, or Edge. Browser-level issues — corrupted profiles, conflicting security policies, unusual extension combinations — can break authentication flows in ways that are difficult to diagnose within that same browser. A fresh browser with default settings will quickly tell you whether the issue is browser-specific.
Why This Happens
Claude uses OAuth 2.0 for Google and Apple sign-in, and its own session management for email/password accounts. Login failures typically fall into one of four categories:
- Method mismatch: Trying to authenticate via a method that was not used at registration — always fails silently with a generic error
- Session/cookie corruption: A previous incomplete login attempt left malformed cookies that interfere with new attempts
- Browser extension interference: Extensions that block third-party requests or rewrite headers can interrupt the OAuth redirect chain
- Network blocking: Firewalls or content filters that block auth.anthropic.com or the Google/Apple OAuth endpoints
Common Mistakes to Avoid
- Requesting verification codes repeatedly in quick succession — Multiple rapid requests can trigger rate limiting on your email address. Wait 5 minutes between requests.
- Signing in with the wrong Google account — If you have multiple Google accounts, the browser will ask which one to use. Carefully select the exact account you registered with.
- Assuming a password exists for SSO accounts — Google and Apple sign-in accounts have no separate password in Claude. Attempting to use email/password for an SSO account will always fail.
- Revoking Apple ID app access — Apple lets you revoke app access from appleid.apple.com. If you did this at any point, Claude's Apple Sign In will stop working until you re-authorize it.
- Ignoring the spam folder — Authentication emails from noreply@anthropic.com are frequently filtered, especially by corporate email systems. Always check spam before giving up on verification codes.
- Not restarting the browser — Clearing cookies while the browser is open sometimes does not fully take effect. A full browser restart is important after clearing session data.
Does Being Unable to Log In Affect Your Data?
No. Your conversations, Projects, uploaded files, and account settings are stored server-side on Anthropic's infrastructure. A login failure does not put any data at risk. Once you recover access through any of the methods above, everything is intact exactly as you left it. Claude does not automatically delete inactive accounts over short periods, so taking a day or two to work through recovery will not result in data loss.
Logging Into Claude on Mobile
Mobile login issues follow a slightly different pattern:
- iOS: If Sign in with Apple is failing, check that your Apple ID is not restricted for third-party apps in Settings → Apple ID → Password and Security. Also check that Screen Time is not blocking the Apple authentication popup.
- Android: Clear the Claude app cache in Settings → Apps → Claude → Storage → Clear Cache, then force-stop the app and reopen it. Do not clear app data unless you want to log out.
- Both platforms: If the app shows a loading spinner indefinitely after sign-in, force-close the app and reopen it — the session likely completed in the background and a fresh open will show you as logged in.
The mobile app uses the same authentication system as the browser, so an issue on one platform usually reflects an account-level or network-level problem, not a platform-specific bug.
Claude for Teams and Enterprise Login
If you access Claude through a team or enterprise plan, your login may route through your organization's SSO provider — such as Okta, Azure Active Directory, or Google Workspace — rather than standard Google or Apple sign-in. If you cannot log in to an enterprise Claude instance:
- Contact your IT administrator, not Anthropic support — your IT team controls who is provisioned and whether your account is active
- Confirm that your organization's SSO configuration includes your current email address as an authorized user
- Check whether your organization's Claude subscription has expired or whether your seat has been deprovisioned
Individual browser troubleshooting (clearing cookies, trying incognito) still applies to enterprise logins, but the root cause is usually on the organization's SSO configuration side.
Quick Reference: Login Error by Symptom
- "Wrong password" error → You are using email login for an SSO account — use the Google or Apple button instead
- No verification email → Check spam folder, wait 5 minutes, verify you are checking the right inbox
- Redirect loop after login → Delete all claude.ai and anthropic.com cookies and session data
- Blank screen after login → Open incognito and disable extensions — one is blocking the post-login redirect
- "Account not found" → You are selecting the wrong Google account or the email does not match any account
- Spinner that never stops → Force-close browser, clear cookies, retry from fresh