When you encounter a certificate error in your web browser, it can compromise your security and interrupt your browsing experience. In this comprehensive guide, you’ll find detailed, step-by-step answers to the question “how to fix a certificate error” and learn how to resolve SSL/TLS certificate issues on different browsers and systems.
Certificate errors occur when a browser blocks access to a website due to an SSL certificate that is expired, misconfigured, or issued by an untrusted authority. SSL (Secure Sockets Layer) and TLS (Transport Layer Security) certificates ensure encrypted and secure communication between websites and users. Without this layer of security, your information can fall into the hands of attackers.
Invalid or expired certificate
Incorrect date and time settings
Untrusted Certificate Authority (CA)
Browser cache issues
Interference from security software
Use of VPN or proxy
Outdated browser or operating system
Below are the steps you can take to resolve SSL certificate errors encountered in your browser.
Browsers regularly fix security vulnerabilities related to certificates. Therefore:
Ensure you're using the latest version of Google Chrome, Mozilla Firefox, Microsoft Edge, or Safari.
Check for updates under the “Help > About” section of your browser.
Corrupted cache or cookies can cause certificate validation issues.
Go to the “Privacy & Security” settings of your browser and clear cookies and site data.
Also reset the cache.
Incorrect system time may cause the browser to see the certificate as invalid.
Windows: Control Panel > Date and Time > Set Time Zone
macOS: System Settings > Date and Time
SSL errors are usually caused by an invalid, expired, or misconfigured certificate. Here are some methods to fix them:
Start > Internet Options > Content tab > Clear SSL State
Click the padlock icon on the error page and view certificate information.
Check its validity period, issuing authority, and the domain it applies to.
Some VPN or proxy services can disrupt the certificate chain. Try disabling them temporarily and reconnect.
From your browser’s advanced settings or warning page, download and install the certificate manually.
However, only do this if you’re sure the site is safe and trustworthy.
If you manage the website or server:
Obtain a valid certificate from trusted CAs like Let's Encrypt, DigiCert, or Comodo.
Ensure proper installation of the certificate chain and intermediate certificates.
Some antivirus software uses their own certificates to scan HTTPS traffic, which can cause conflicts in your browser.
Go to your antivirus settings.
Disable the “HTTPS scanning” or “SSL inspection” option.
Make sure Windows Firewall or third-party firewalls allow the necessary connections.
Keep your browser and OS updated
Use trusted antivirus software
Use reliable VPN/proxy services
Set date and time updates to automatic
A certificate error appears when the browser fails to verify a website’s identity. It means the site’s SSL/TLS certificate is invalid or issued by an untrusted authority.
No. A certificate error indicates that the site does not provide a secure connection. Your personal data may be at risk. Do not ignore this warning.
Update your browser, clear cache, correct date/time settings, reset SSL state, and check antivirus settings.
Yes. On Android and iOS, certificate errors can occur due to incorrect date/time settings, browser cache, or expired site certificates.
Certificate errors are important security warnings. By following the steps outlined in this guide, you can protect yourself and ensure uninterrupted browsing.
If you encounter these errors frequently, it's recommended to thoroughly check your system or consult a professional IT expert.
Turkey (Türkçe)
Worldwide (English)