The “Can’t reach Claude” error appears when your browser or app can’t connect to Claude’s servers. It may show up while opening Claude.ai, sending a prompt, signing in, or loading an old conversation. Sometimes the page keeps trying to reconnect but nothing changes.
This error doesn’t always mean Claude is down. Your internet connection, browser data, VPN, firewall, or Claude app may be causing it. This guide covers the common reasons and gives you practical fixes for the Claude website, mobile app, and desktop app.
What Does “Can’t Reach Claude” Mean?
“Can’t reach Claude” means your device sent a request but couldn’t complete the connection with Claude. The request may have stopped inside your browser, Wi-Fi network, security software, or somewhere between your device and Anthropic’s servers.
The message doesn’t confirm the exact cause. It can appear during an Anthropic service outage but it may also affect only one browser or device. It’s different from an incorrect password, account restriction, or message usage limit.
Why Does the “Can’t Reach Claude” Error Happen?
The problem can start with Claude’s service or with the connection on your side. A quick check across another browser, device, or network can often show where the fault sits. Common causes include:
- Anthropic is facing a service disruption
- Your internet connection is weak or disconnected
- A VPN or proxy is changing the connection route
- Claude’s cookies or cached files are damaged
- A browser extension is blocking scripts
- Your browser or Claude app is outdated
- A firewall or antivirus tool is filtering Claude traffic
- Your DNS server can’t find Claude.ai correctly
- A school or workplace network blocks AI websites
- Your Claude login session has expired
- Public Wi-Fi needs you to complete its sign-in page
- Your device has the wrong date or time
- The Claude app has damaged local data
How to Fix the “Can’t Reach Claude” Error?
If you’re facing this issue, try these fixes one by one. Test Claude after each change so you know which fix worked. Start with the quick checks before changing your security or network settings.
1. Check Whether Claude Is Down
Start by checking Anthropic’s official status page. This page shows whether Claude.ai, the API, or another Claude service has an active problem. Look for a notice about a service disruption or elevated error rates.
The status page may use these labels:
- Operational means the service should be working
- Investigating means Anthropic is checking a reported issue
- Identified means the team has found the cause
- Monitoring means a fix was applied and is being watched
- Resolved means the reported incident has ended
If the status page shows an active incident that matches your problem, wait and try Claude later. Changing your browser or router won’t repair a server-side outage. Anthropic may not provide an exact repair time for every incident.
2. Test Your Internet Connection
Open another website and check whether it loads normally. Try playing a short video or refreshing a page that you haven’t opened before. A website already stored in your browser may load even when the connection is weak.
If you use Wi-Fi, switch to mobile data and open Claude again. You can also connect to another trusted Wi-Fi network. When Claude works on mobile data but fails on your home Wi-Fi, the router, DNS, or network filter is likely involved.
Restart your router if other websites are also slow or failing. Unplug its power cable and wait about 30 seconds. Connect it again and let the network fully return before testing Claude.
3. Refresh Claude and Restart Your Device
A temporary browser or app problem may block the connection. Refresh Claude.ai and wait a few seconds. If that doesn’t work, close the tab and open Claude in a new one. App users should remove Claude from recent apps and open it again.
Restart your phone or computer if the message stays on the screen. This closes stuck network tasks and reloads the system connection. Open Claude after the restart and send a short test prompt.
4. Turn Off Your VPN or Proxy
A VPN changes the route your device uses to reach Claude. That route may be slow, blocked, or connected through a location where access isn’t working. Proxy servers and browser VPN extensions can cause the same problem.
Try this quick test:
- Disconnect your VPN.
- Close the VPN app or browser extension.
- Turn off any manual proxy setting you added.
- Close and reopen your browser.
- Visit Claude.ai again.
If Claude starts working, the VPN or proxy caused the connection problem. You can try a different server or check whether the VPN supports split tunnelling. Don’t change a workplace proxy without asking the network administrator.
5. Clear Claude’s Cache and Cookies
Your browser saves cookies and site files to load Claude faster. Those files can become outdated or damaged. A broken login cookie may also keep sending Claude through a failed session.
It’s better to clear data for Claude.ai instead of deleting cookies from every website. In Chrome or Edge, open Claude.ai and select the site controls icon near the address bar. Open the site data or cookie settings and remove the saved data for Claude.
Firefox and Safari also let you remove data for one website through their privacy settings. After clearing it, close the browser and open it again. Visit Claude.ai and sign back into your account.
Clearing site data will sign you out. It won’t delete conversations stored in your Claude account.
6. Disable Browser Extensions
Some extensions block website scripts, cookies, or network requests. Ad blockers, privacy tools, script blockers, and browser VPNs are the most likely types to affect Claude. Still, don’t assume that every extension is a problem.
Open Claude in a private or incognito window first. Extensions often stay off in this mode unless you allowed them to run there. If Claude works privately, an extension or saved browser file is probably involved.
Return to the normal browser window and turn extensions off one at a time. Reload Claude after each change. When the error disappears, you’ll know which extension needs a new rule or should remain disabled on Claude.ai.
7. Sign Out and Sign Back Into Claude
An old account session can stop working even when your password is still correct. Sign out of Claude and close all open Claude tabs. Reopen the browser and sign in again.
If the page won’t let you sign out, clear Claude’s site data first. Then return to Claude.ai and create a fresh login session. Team and Enterprise users who sign in through SSO may need to check with their organization’s administrator if authentication keeps failing.
This fix is for a damaged or expired session. If Claude says your password is wrong, use the normal account recovery process instead.
8. Try Another Browser or Device
Testing another browser helps separate a Claude account issue from a local browser problem. If you normally use Chrome, try Edge, Firefox, or Safari. Make sure the second browser is updated before testing.
You can compare the problem in a few ways:
- Same device with a different browser
- Same account on another device
- Same device on another network
- Claude app instead of Claude.ai
- Claude.ai instead of the mobile app
If Claude works in another browser on the same computer, the original browser likely has damaged site data or an extension conflict. If it fails on every device connected to one Wi-Fi network, check the router, DNS, and firewall. When it fails across different devices and networks, review the Claude status page and your account access.
9. Update Your Browser or Claude App
An outdated browser may not handle Claude’s current website features correctly. Open your browser settings and check for an update. Install it then fully restart the browser.
Mobile users should open the Google Play Store or Apple App Store and search for Claude. Install any available app update. Restart the phone after the update if the connection problem remains.
Desktop app users should check for an update inside the app or download the current installer from the official Claude website. Your operating system may also need an update if it no longer supports the current app version. Don’t download Claude installers from unknown websites.
10. Check Firewall and Antivirus Settings
A firewall can block the browser or Claude desktop app from reaching the internet. Antivirus tools may also inspect encrypted website traffic. A bad rule can interrupt Claude while other websites continue to load.
Check these areas:
- Allow your web browser through the firewall
- Allow the Claude desktop app on trusted networks
- Review blocked-app lists inside third-party antivirus software
- Check whether web protection or HTTPS scanning blocks Claude.ai
- Remove an old rule that blocks Anthropic domains
Don’t leave your firewall or antivirus turned off. If you disable one feature for a short test, turn it back on as soon as the test ends. Add a narrow permission for the browser or Claude app if security software caused the error.
People using a managed computer may not have permission to change these settings. In that case, ask the workplace or school administrator to check whether Claude is blocked.
11. Change the DNS Server
DNS helps your device find the address behind a website name. If the current DNS service can’t resolve Claude.ai correctly, the browser may show a connection error even when other websites work.
You can test a trusted public DNS service from providers such as Cloudflare or Google. Write down your current settings before making any change. That gives you a way to restore them if the new DNS doesn’t help.
After changing the DNS, close the browser and restart your device. Open Claude.ai and test it again. If there’s no difference, restore the old DNS settings. Workplace and school users shouldn’t bypass required network controls without permission.
12. Clear or Reinstall the Claude App
If Claude works in a browser but not in the mobile app, the app may have damaged local files. Android users can try clearing only the cache first.
On Android:
- Open Settings.
- Select Apps.
- Find and open Claude.
- Select Storage & cache.
- Tap Clear cache.
- Reopen Claude and test it.
Clearing the cache shouldn’t remove your account. Avoid selecting Clear storage unless you’re ready to sign in again.
On an iPhone, close the Claude app and restart the phone first. If the error stays, uninstall Claude and download it again from the App Store. Android users can also reinstall the app when clearing its cache doesn’t work.
Reinstalling the app removes local app data but it doesn’t delete conversations saved to your Claude account. Make sure you know your login details before removing it.
13. Check the Device Date and Time
Claude uses secure web connections. A device with the wrong date or time may fail to verify that connection. This can happen after a battery issue, manual time change, or travel between time zones.
Open the date and time settings on your phone or computer. Turn on automatic time and automatic time zone. Restart the browser or Claude app after the correct time appears.
14. Contact Claude Support or Your Network Administrator
If Claude fails only on a school or workplace network, speak with the network administrator. The organization may block Claude.ai through a firewall, web filter, proxy, or DNS policy. Trying to bypass those controls may break workplace rules.
For other problems, contact Claude Support through the Help option in your Claude account when available. Prepare these details before sending your message:
- The full error text
- A screenshot of the error
- The time when it happened
- Your device and operating system
- Your browser or Claude app version
- The type of network you were using
- Whether Claude worked on another device or network
- The fixes you already tried
Don’t send your password, API key, private conversation, or full payment details. Support doesn’t need those items to begin checking a connection error.
How to Prevent the “Can’t Reach Claude” Error?
You can’t prevent an Anthropic server outage. You can still lower the chance of browser, app, and local network problems. Keep your setup stable and avoid changing several connection settings at the same time.
- Keep your browser and Claude app updated
- Use a stable Wi-Fi or wired internet connection
- Avoid unreliable VPN and proxy servers
- Allow your browser or Claude app through the firewall
- Keep automatic date and time enabled
- Use browser extensions from trusted developers
- Restart the router when the whole network becomes unstable
Don’t clear all browser cookies as a regular habit. Remove Claude’s site data only when you’re fixing a login or loading problem. This keeps other website sessions in place.
Final Thoughts
The “Can’t reach Claude” error means your browser or app couldn’t complete its connection with Claude. First check Anthropic’s service status and test your internet. Then restart Claude, turn off the VPN, clear Claude’s site data, and check browser extensions.
Testing another device or network can save time. If Claude works elsewhere, the problem is likely on the original browser, app, or network. If Anthropic reports an outage, wait for the service to recover. If you found another fix that worked, share it in the comments so other Claude users can try it.
