Google Chrome Error Code ERR_CERT_COMMON_NAME_INVALID: How to Fix It

Easy 10-20 minutes High Severity Verified June 2026
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Error Code
ERR_CERT_COMMON_NAME_INVALID
Brand
Google Chrome
Product Type
browser
Severity
High
DIY Difficulty
Easy
Estimated Fix Time
10-20 minutes
The ERR_CERT_COMMON_NAME_INVALID error occurs when Chrome cannot verify that a website's SSL certificate matches the domain you're trying to visit. This security feature protects you from potentially malicious sites, but sometimes legitimate sites trigger this error due to configuration issues.
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Tools You'll Need

How to Fix Error Code ERR_CERT_COMMON_NAME_INVALID

  1. Check the URL spelling

  2. Clear Chrome's cache and cookies

    This will log you out of most websites

  3. Disable antivirus SSL scanning temporarily

    Only disable antivirus features temporarily and re-enable them immediately after testing

  4. Check your system date and time

  5. Try incognito mode

  6. Disable Chrome extensions

  7. Flush DNS cache

  8. Reset Chrome settings

    This will reset Chrome to default settings and disable extensions
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When to Call a Professional

Contact your IT administrator if this error persists on company networks, or contact the website owner if the error occurs consistently across multiple devices and browsers, as it may indicate a server-side certificate configuration issue.

Frequently Asked Questions

What does ERR_CERT_COMMON_NAME_INVALID mean?
This error means the website's SSL certificate was issued for a different domain name than the one you're trying to visit. Chrome blocks the connection to protect your security.
Is it safe to ignore this Chrome certificate error?
No, you should not ignore this error as it could indicate a security risk. The error protects you from potentially malicious sites or man-in-the-middle attacks.
Why do I get this error on legitimate websites?
Legitimate sites can trigger this error due to misconfigured SSL certificates, expired certificates, or when accessing the site through a different domain than the certificate was issued for.
How do I fix ERR_CERT_COMMON_NAME_INVALID permanently?
The permanent fix depends on whether you're the website owner (configure certificates correctly) or a visitor (ensure correct URL, clear cache, check system time).
Can outdated Chrome cause certificate errors?
Yes, using an outdated version of Chrome can cause certificate validation issues. Update Chrome to the latest version through Settings > About Chrome.

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