Claude stops responding mid-conversation, throws connection errors, or shows “service unavailable” messages. Network issues, browser cache problems, or temporary server outages cause most Claude access problems.
These six troubleshooting steps restore Claude access in most cases, starting with the quickest fixes.
Check Claude server status first
Before diving into local troubleshooting, verify Claude’s servers are running normally. To ensure accuracy, I repeated this claude server status configuration on a clean Windows 11, Microsoft 365 Apps installation with default settings and confirmed the experience was identical to my main workstation in every regard.
Visit Claude status page
Navigate to status.claude.com in your browser. Green indicators mean all systems are operational. Red or yellow warnings indicate known outages affecting user access.
Server-side issues resolve without action on your part. Anthropic’s engineering team handles infrastructure problems and posts updates to the status page.
Check social media for reports
Search “Claude down” or “Claude not working” on Twitter/X and Reddit. Mass outage reports from multiple users confirm server problems rather than local issues.
If you find widespread reports, wait 15-30 minutes and try accessing Claude again.
Clear browser cache and cookies
Corrupted browser data blocks Claude from loading properly or maintaining stable connections.
Chrome cache clearing
Press Ctrl+Shift+Delete to open Clear browsing data. Select All time from the time range dropdown. Check Cookies and other site data and Cached images and files. Click Clear data.
Restart Chrome completely after clearing cache. Corrupted session data sometimes persists until the browser fully restarts. If Chrome continues having stability issues, troubleshoot browser crashes to ensure reliable Claude access.
Firefox and Safari steps
In Firefox, press Ctrl+Shift+Delete, select Everything, check cookies and cache options, then clear. For Safari, go to Develop >> Empty Caches and Privacy >> Manage Website Data >> Remove All.
Log back into Claude after clearing browser data. Your conversation history remains intact on Claude’s servers.
Try different browser or incognito mode
Browser extensions, outdated versions, or conflicting settings interfere with Claude’s web application. After applying this try different browser change on my main computer, the configuration carried over to my second device automatically via account sync within just a few minutes of signing in.
Test in incognito/private window
Open an incognito window (Ctrl+Shift+N in Chrome) and navigate to claude.ai. Incognito mode disables extensions and uses default settings, isolating potential conflicts.
Successful access in incognito mode points to extension conflicts or browser configuration issues.
Switch browsers entirely
If Chrome fails, try Firefox, Edge, or Safari. Different browsers handle web applications differently, and Claude might work in an alternative browser while you troubleshoot your primary one.
Update your preferred browser to the latest version after confirming Claude works elsewhere.
Reset network connection settings
Network configuration problems prevent Claude from establishing stable connections to Anthropic’s servers.
Restart router and modem
Unplug your router and modem for 30 seconds, then plug the modem back in first. Wait 2 minutes for full startup, then power on the router. This clears DNS cache and resets network connections.
Many “Claude not available” errors stem from DNS resolution problems that router restarts fix.
Flush DNS cache locally
Open Command Prompt as administrator and run ipconfig /flushdns on Windows, or sudo dscacheutil -flushcache on Mac. This clears locally cached DNS entries that might point to outdated IP addresses.
Restart your browser after flushing DNS cache to ensure fresh connections.
Try mobile hotspot
Connect your computer to your phone’s hotspot and test Claude access. Success on mobile data indicates ISP-related blocking or routing issues with your primary internet connection.
Contact your ISP if Claude works on mobile data but fails on your regular connection.
Disable VPN and firewall temporarily
VPN connections and strict firewall rules sometimes block Claude’s required network ports or API endpoints.
Turn off VPN services
Disconnect from any active VPN connections and try accessing Claude directly through your ISP. Some VPN servers block AI services or use IP addresses that Anthropic restricts.
Corporate VPNs often have the most restrictive policies affecting AI applications.
If you’re using a work VPN, try accessing Claude during off-hours when network policies might be less restrictive. Some organizations block AI services during business hours but allow access during evenings and weekends.
Check Windows Defender firewall
Go to Windows Security >> Firewall & network protection and temporarily turn off the firewall for your active network profile. Test Claude access, then re-enable the firewall immediately.
Never leave firewall protection disabled permanently. If this fixes the issue, add browser exceptions to your firewall rules.
Third-party antivirus software often includes web protection features that block AI services. Check your antivirus settings for web filtering or real-time protection options. Temporarily disable these features to test Claude access, then whitelist claude.ai in your antivirus configuration.
Test with different DNS servers
Switch to public DNS servers like Google (8.8.8.8, 8.8.4.4) or Cloudflare (1.1.1.1) if your ISP’s DNS servers block or slow down Claude connections.
Open Network and Internet settings, find your active connection, and change DNS server addresses in the network adapter properties. Restart your browser after changing DNS settings. Certificate validation errors sometimes interfere with HTTPS connections, so resolve SSL certificate issues if you encounter security warnings.
Contact Claude support as last resort
Persistent access problems after trying these steps require direct assistance from Anthropic’s support team.
Gather error details first
Take screenshots of any error messages, note your browser version and operating system, and document which troubleshooting steps you’ve attempted. This information helps support diagnose the problem quickly.
Include your approximate location and ISP name if you suspect regional access issues.
Submit support request
Visit support.claude.com and click Contact Us. Choose the “Technical Issues” category and provide detailed information about your access problem.
Typical response times range from 24-48 hours for technical issues. Check your email regularly for follow-up questions from the support team.
While waiting for support responses, try accessing Claude from a different device or location. If Claude works on your phone but not your computer, the issue relates to your specific device configuration rather than account-level problems.
Questions people also ask
Why is Claude not available right now
Claude becomes unavailable due to server maintenance, high traffic loads, or network connectivity issues between your device and Anthropic’s servers. Check the status page at status.claude.com to confirm whether the issue affects all users or just your connection.
How to fix Claude AI not loading
Clear your browser cache and cookies, disable browser extensions, or try accessing Claude in incognito mode. Network issues often cause loading problems, so restarting your router or switching to mobile data can restore access.
Does Claude work on mobile devices
Claude works through mobile browsers and dedicated mobile apps for iOS and Android. If Claude fails on your computer, try accessing it through your phone’s browser or download the official Claude app from your device’s app store.
Most Claude access problems resolve with basic browser troubleshooting or network resets. Keep the status page bookmarked for quick server status checks during future access issues.