Google Chrome Error Code ERR_CERTIFICATE_TRANSPARENCY_REQUIRED: How to Fix It

Medium 10-30 minutes Medium Severity Verified June 2026
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Error Code
ERR_CERTIFICATE_TRANSPARENCY_REQUIRED
Brand
Google Chrome
Product Type
browser
Severity
Medium
DIY Difficulty
Medium
Estimated Fix Time
10-30 minutes
The ERR_CERTIFICATE_TRANSPARENCY_REQUIRED error in Google Chrome means the website's SSL certificate has not been logged in a public Certificate Transparency (CT) log, which Chrome requires for all certificates issued after a certain date. Chrome uses CT logs to detect mis-issued or fraudulent certificates, and when a site's certificate lacks this information, Chrome blocks the connection to protect you. This is most commonly caused by an outdated certificate on the website's server, a misconfigured corporate network or proxy, or antivirus software intercepting your HTTPS traffic.
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Tools You'll Need

How to Fix Error Code ERR_CERTIFICATE_TRANSPARENCY_REQUIRED

  1. Reload the Page and Check Your Internet Connection

  2. Update Google Chrome to the Latest Version

  3. Disable or Temporarily Pause Your Antivirus SSL Scanning

    Only disable HTTPS scanning temporarily for testing purposes. Re-enable it after your test unless your antivirus vendor provides a permanent compliant solution.

  4. Check for Corporate Proxy or VPN Interference

  5. Clear Chrome's Cache, Cookies, and SSL State

  6. Check Your System Date and Time

  7. Use a Chrome Policy to Bypass CT for Specific Internal Sites (Advanced/IT Use)

    Bypassing CT enforcement reduces browser security. Never apply this policy to public-facing websites. This step is for IT administrators managing internal infrastructure only.

  8. Contact the Website Owner

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When to Call a Professional

If you are on a corporate or enterprise network and the error persists after checking antivirus and VPN settings, escalate to your IT department — they will need to update SSL inspection policies or certificate infrastructure. If you are a website owner and your certificate lacks CT log entries, contact your SSL certificate provider or hosting company to reissue a compliant certificate. If you are a developer managing internal PKI (Public Key Infrastructure), a security engineer or network administrator should configure CT exemption policies appropriately.

Frequently Asked Questions

What does ERR_CERTIFICATE_TRANSPARENCY_REQUIRED mean in Chrome?
It means Chrome cannot verify that the website's SSL certificate has been publicly logged in a Certificate Transparency log. Chrome requires all certificates issued after April 2018 to be recorded in these public logs as a fraud-prevention measure. When the certificate lacks CT log information, Chrome blocks the connection and displays this error.
Is ERR_CERTIFICATE_TRANSPARENCY_REQUIRED dangerous to bypass?
It can be risky. Certificate Transparency is a security feature designed to detect fraudulent or mis-issued certificates. Bypassing it means your browser cannot verify the certificate's legitimacy through public CT logs. Only bypass this error on trusted internal networks or sites where you control the certificate infrastructure. Never bypass it on public websites you do not manage.
Why does my antivirus cause ERR_CERTIFICATE_TRANSPARENCY_REQUIRED?
Antivirus programs with HTTPS or SSL scanning features work by intercepting your encrypted web traffic. To do this, they replace the website's original certificate with one generated by the antivirus software. These replacement certificates are often not submitted to public CT logs, which causes Chrome to reject them with this error. Disabling the SSL scanning feature in your antivirus or updating the antivirus to a version that uses CT-compliant certificates usually resolves this.
Does ERR_CERTIFICATE_TRANSPARENCY_REQUIRED only appear in Chrome?
Mostly yes. Google Chrome enforces Certificate Transparency requirements more strictly than many other browsers. You may not see this error in Firefox, Safari, or Edge for the same website. However, Chrome's CT enforcement is considered a security best practice, and if a site triggers this error in Chrome, the site's certificate likely has a real compliance issue that the website owner should address.
How do I fix ERR_CERTIFICATE_TRANSPARENCY_REQUIRED on a website I own?
You need to reissue your SSL certificate through a Certificate Authority (CA) that properly submits certificates to public CT logs. Most major CAs such as Let's Encrypt, DigiCert, and Comodo do this automatically. Log into your hosting control panel or contact your hosting provider and request a new certificate. After installation, you can verify CT compliance using the free SSL Labs test at ssllabs.com/ssltest. Ensure your certificate shows SCT (Signed Certificate Timestamp) entries in the test results.

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