Middleware and data syncing agents.
Unlike HTTP and HTTPS which are protocols, localhost is a hostname. Remember that the website domain name is what follows the http... freeCodeCamp
Click the "Not Secure" warning in the address bar and view the certificate details.
To help isolate your specific issue, please tell me you are currently using, and which exact error message your browser displays when you attempt to connect. AI responses may include mistakes. Learn more Share public link https localhost11501 verified
Ensure the new certificate configuration is loaded.
For quick troubleshooting where strict validation isn't mandatory, you can instruct your browser to ignore security errors specifically for local loops. In Google Chrome, paste chrome://flags/#allow-insecure-localhost into your address bar and toggle the setting to . Implementation Across Environments
Eliminates distracting browser warning screens and interrupted API calls during development. Middleware and data syncing agents
Restart your browser and navigate back to https://localhost:11501 . Method 2: Use Mkcert for a Local Certificate Authority
The software created its own certificate rather than buying one from a global authority.
Localhost Refused to Connect Error: 5 Confirmed Ways to Fix It - Hostinger 21 Jan 2026 — freeCodeCamp Click the "Not Secure" warning in the
When you see "verified" or "proper text" in this context, it usually means the local host service (often a signer or driver utility) is communicating correctly with the browser.
Troubleshooting "https://localhost:11501" SSL Certificate Warnings and Verification
Depending on your operating system, development framework, and security requirements, you can use several methods to get that coveted green lock or "verified" status. Method 1: The Trust Command (For .NET Developers)
| Method | Approach | Certificate "Verified" Status | Security & Recommendation | | :--- | :--- | :--- | :--- | | | Enables chrome://flags/#allow-insecure-localhost to ignore certificate errors. | Not Verified : Browser shows a warning, but bypasses it. | Not Recommended : Dangerous, as it trains you to ignore security warnings. | | Manual Self-Signed Certificate | Generate and sign your own certificate using OpenSSL , then manually add it to your OS trust store. | Verified : Browser shows as secure only on your machine . | Ok for Testing : Viable for experienced developers who need full control. | | The mkcert Tool | Automates creating and installing a locally-trusted CA and certificates in seconds. | Verified : Seamless, automatic trust across all browsers. | Highly Recommended : The best, most secure, and easiest method. |