Chrome ERR_SSL_PROTOCOL_ERROR

Chrome ERR_SSL_PROTOCOL_ERROR means the browser cannot establish a secure SSL/TLS connection with the website. This guide covers everything you need to know about this topic, including common causes, step-by-step solutions, and answers to frequently asked questions.

Here are the key things to understand: SSL/TLS handshake failed between browser and server. Cannot establish encrypted HTTPS connection. Site may have misconfigured SSL certificate. Different from certificate validity errors. Understanding these fundamentals will help you diagnose and resolve this issue more effectively.

The most common reasons this occurs include: Server SSL/TLS configuration is broken. Incompatible SSL/TLS protocol version. System clock is significantly wrong. Antivirus intercepting SSL connections. Identifying the root cause is the first step toward finding the right solution.

To resolve this, follow these recommended steps: Check your system date and time are correct. Disable antivirus SSL scanning temporarily. Clear Chrome SSL state: Settings > Security > Manage certificates. Try accessing with different protocol: change https to http (not recommended for sensitive sites). If these steps do not resolve the issue, consider consulting additional resources or a qualified professional.

This article is part of our Browser Errors collection on Error Codes Wiki. We provide comprehensive, up-to-date information to help you find solutions quickly.