Grammarly AI Not Working in Browser Fix (2026)

To fix Grammarly AI not working in your browser, verify the extension has “Access all sites” permission enabled, clear browser cache and cookies for Grammarly domains, then uninstall and reinstall the extension from the official store. If the issue persists, create a clean browser profile with only Grammarly installed to test for extension conflicts, and confirm your subscription includes AI features by checking your Grammarly account dashboard.

Common Causes of Grammarly AI Failures

Understanding the root causes helps you apply the right solution faster. Grammarly AI features typically fail due to browser extension conflicts, permission issues, cache corruption, outdated application versions, or network restrictions. Each cause requires a different approach, so work through these solutions systematically.

Step-by-Step Fixes

Fix 1: Verify Browser Extension Permissions

Grammarly requires specific permissions to function correctly. Open your browser’s extension manager and confirm Grammarly has permission to access all websites or the specific sites where you’re experiencing issues.

In Chrome, navigate to chrome://extensions, find Grammarly, and click “Details.” Check that “Access all sites” is enabled. If Grammarly only has access to specific sites, add the domains where you need AI assistance. Some users report that restricting permissions to “when clicked” prevents AI features from loading automatically on page load.

Fix 2: Clear Browser Cache and Cookies

Corrupted cache data frequently causes AI features to fail to load. Clear your browser’s cache and cookies specifically for Grammarly’s domains.

For Chrome, go to chrome://settings/cookies, search for “grammarly,” and delete all stored data. In Firefox, access about:preferences#privacy, search for cookies, and remove Grammarly entries. After clearing, restart your browser and log back into Grammarly to regenerate fresh cache files.

Fix 3: Update or Reinstall the Extension

An outdated extension version may lack compatibility with Grammarly’s latest AI server changes. Uninstall the current extension completely, then reinstall the latest version from your browser’s extension store.

Before reinstalling, note your account email so you can sign back in. Some users find that downloading the extension fresh from the official Chrome Web Store or Firefox Add-ons portal resolves version conflicts that auto-updates miss.

Fix 4: Disable Conflicting Extensions

Browser extensions that modify page content, inject scripts, or manage network requests often conflict with Grammarly’s AI features. Common culprits include other grammar checkers, ad blockers, privacy extensions, and developer tools that intercept requests.

Create a new browser profile with only Grammarly installed to test for extension conflicts. If AI works in the clean profile, systematically re-enable your other extensions one by one to identify the culprit. Popular conflict sources include uBlock Origin, Privacy Badger, and various VPN extensions that route traffic through proxies.

Fix 5: Check Network and Firewall Settings

Grammarly’s AI features require stable connections to their servers. Corporate networks, VPNs, and firewalls may block the API endpoints necessary for AI processing. Check if you can access https://api.grammarly.io from your browser. If the connection times out or fails, your network is likely blocking necessary traffic.

Try disconnecting from your VPN temporarily to see if AI features resume. For corporate networks, contact your IT administrator to whitelist Grammarly’s domains. Some users report success using browser-specific DNS settings or adding exceptions through their firewall software.

Fix 6: Verify Account Status and Subscription

AI features require an active Grammarly subscription. Free accounts have limited AI access compared to Premium or Business tiers. Log into your Grammarly account dashboard and confirm your subscription is active. Check if you’re logged into the correct account associated with your browser extension.

Sometimes users have multiple Grammarly accounts, and the browser extension connects to an account without AI access. Sign out from the extension, clear tokens, and sign back in with the correct account credentials.

Fix 7: Browser-Specific Solutions

Chrome: Enable hardware acceleration if it’s disabled, as Grammarly’s AI uses GPU acceleration for processing. Navigate to chrome://settings/system and ensure “Use hardware acceleration when available” is turned on. Restart Chrome after changing this setting.

Firefox: Check that Enhanced Tracking Protection isn’t blocking Grammarly. Click the shield icon in the address bar and adjust protections for sites where Grammarly operates. Firefox’s container extensions can also isolate Grammarly’s cookies, breaking AI functionality.

Edge: Microsoft’s browser includes built-in tracking prevention that may interfere. Go to edge://settings/privacy and set tracking prevention to “Balanced” or add exceptions for Grammarly domains. Edge’s efficiency mode can also throttle extension performance—disable it for testing.

Safari: Grammarly’s Safari extension requires specific permissions. Go to Safari Preferences, click Extensions, and ensure Grammarly has permission to access all websites. Safari’s Intelligent Tracking Prevention can also disrupt Grammarly’s session management.

Fix 8: Console Diagnostics for Developers

If you’re comfortable with browser developer tools, check the console for specific error messages. Open Developer Tools (F12 or Cmd+Option+I), navigate to the Console tab, and look for network failures or JavaScript errors when Grammarly attempts to load AI features.

Common error patterns include CORS failures indicating blocked cross-origin requests, authentication errors showing expired tokens, and WebSocket connection failures to Grammarly’s real-time processing servers. Screenshot these errors when contacting Grammarly support for faster resolution.

Prevention Tips

Maintain Grammarly AI functionality by keeping your extension updated automatically, avoiding conflicting extensions when possible, and periodically clearing browser data. Consider using Grammarly’s desktop application as a backup when browser extensions experience issues—desktop versions often receive updates before browser extensions.

For teams managing Grammarly across multiple users, deploy consistent browser configurations and whitelist necessary domains in your network infrastructure. This prevents the most common enterprise-related AI failures.

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