Claude.ai Not Loading, Showing Blank Page, or Login Failing — How to Fix It

You open Claude.ai expecting a quick conversation — and get a completely white page, an infinite spinner, or an error you've never seen before.

The silence is frustrating. No error message means no obvious starting point. Is it your network? Your account? The server? This guide walks through the most common causes in the order that resolves them fastest, so you can get back to work without burning time on guesswork.

Step One: Check Whether Anthropic's Servers Are Down

Before blaming your browser or network, spend thirty seconds confirming that Claude.ai itself is operational.

Visit status.anthropic.com and look at the current status indicator.

If everything shows Operational, the problem is on your end. If you see Degraded Performance or Partial Outage, Anthropic's infrastructure is under stress and there's nothing to do but wait and retry later. Following Anthropic's X account (@AnthropicAI) for incident updates can be helpful during outages.

Once you've confirmed the service is up, move on to the browser-side causes.

Browser Cache and Cookie Issues — The Most Common Culprit

If Claude.ai was working fine before and suddenly isn't, stale cache or a corrupted session cookie is the first place to look. This accounts for the majority of blank-page reports.

Clearing Cache and Cookies

Chrome / Edge:

Press Ctrl + Shift + Delete (Mac: Cmd + Shift + Delete) to open the clear browsing data panel
Set the time range to All time
Check Cached images and files and Cookies and other site data
Click Delete data and restart the browser

Safari:

Open Safari → Settings → Privacy
Click Manage Website Data → Remove All
Restart Safari

Firefox:

Press Ctrl + Shift + Delete
Select Everything as the time range
Check Cookies and Site Data and Cache
Click Clear Now and restart

After clearing, navigate directly to claude.ai — don't use a bookmark or previously cached URL.

Quick Test: Private / Incognito Mode

If clearing cache feels like a lot of steps, open an incognito window first and try loading Claude.ai there. Incognito bypasses all stored cookies and cache automatically.

Chrome: Ctrl + Shift + N (Mac: Cmd + Shift + N)
Safari: Cmd + Shift + N
Firefox: Ctrl + Shift + P

If Claude.ai loads normally in private mode but not in your regular browser window, cached data is definitely the cause. Clear it using the steps above and the problem goes away.

Browser Extensions Blocking the Page

Ad blockers, script blockers, and certain privacy extensions can interfere with the JavaScript and authentication scripts Claude.ai depends on — particularly Cloudflare's bot detection layer.

How to Isolate an Extension

In Chrome:

Navigate to chrome://extensions/
Toggle off any ad blockers or privacy-focused extensions one at a time
Reload claude.ai after each toggle to identify the culprit

If an ad blocker is the problem, whitelist Claude.ai rather than disabling the extension entirely. For uBlock Origin, add the following to your custom filters:

@@||claude.ai^$document
@@||anthropic.com^$document

This tells uBlock to allow all requests from Claude.ai without modifying them.

VPN and Corporate Network Problems

VPNs and office firewalls are frequent Claude.ai blockers, especially if you've recently changed networks or connected to a different VPN server.

Diagnosing VPN Issues

Turn off your VPN temporarily and try loading Claude.ai. If it loads, the VPN is the issue. Switching to a different VPN server region often resolves this — Claude.ai is accessible from most countries, but some server locations may be flagged.

To prevent the problem without turning off your VPN, add claude.ai and anthropic.com to your VPN's split-tunnel exclusion list so traffic to those domains bypasses the VPN entirely.

If you're on a corporate or school network, switch to your phone's mobile data and try again. If Claude.ai loads on mobile, your organization's firewall is blocking it. Ask your IT department to whitelist the following domains:

claude.ai
anthropic.com
statsig.anthropic.com

These are required for the full Claude.ai experience. Without statsig.anthropic.com, some features may silently fail even if the main page loads.

Login and Account Issues

"Email and password don't match"

Use the Forgot your password? link on the login screen to reset your password. Even if you're confident you know the password, it's worth resetting — browsers sometimes autofill an outdated version.

Google / GitHub SSO Login Fails

If you're logging in via Google or GitHub and seeing an error:

Make sure you're using the same Google or GitHub account you originally signed up with. Check for typos or multiple email addresses
If you recently changed your Google or GitHub password, sign out of that account and sign back in to refresh the SSO token, then try Claude.ai again

A common pitfall: signing up via Google but then trying to log in with email/password. Claude.ai treats these as different login methods. If you signed up with Google, always use the "Continue with Google" button.

Session Keeps Expiring

If you're logged out every time you restart your browser, check whether your browser is set to delete cookies on close. If so, add claude.ai to the exception list so its cookies persist across sessions.

Also note that enabling Block all third-party cookies in Chrome settings can break session persistence on some sites including Claude.ai. Consider relaxing that setting specifically for Claude.ai.

Still Not Working — Final Checks

If you've been through everything above and Claude.ai still won't load:

Try a different browser. Chrome, Firefox, and Safari all behave differently at the network and cookie level. If one browser is broken, another often isn't.

Try a different device. If your phone opens Claude.ai without issue, the problem is specific to your computer. This narrows down whether it's a system-level DNS or firewall issue.

Flush your DNS cache. Stale DNS entries occasionally cause connection failures.

# macOS
sudo dscacheutil -flushcache && sudo killall -HUP mDNSResponder
 
# Windows (run Command Prompt as Administrator)
ipconfig /flushdns

Contact Anthropic Support. If nothing resolves the issue, Anthropic's support team can check your account status, investigate regional blocks, and advise on anything that can't be fixed from your side.

In practice, clearing your browser cache or opening an incognito window resolves Claude.ai loading issues the vast majority of the time. Start there, and work through the other causes only if the quick fix doesn't help.

If Claude.ai loads but stops responding mid-conversation, that's a different issue — see Claude Not Responding or Freezing Mid-Reply — Complete Troubleshooting Guide for those fixes. If you're seeing errors during payment or subscription, Claude Credit Card Declined and Billing Error Fixes covers the most common causes.