Скачать или смотреть mkcert Localhost Create HTTPS Certificates for Dev Server

One last thing I want to cover today is setting up a local root certificate authority using mkcert, so I can run a local dev server with HTTPS and get rid of those annoying Chrome warnings about untrusted certificates. When you are building apps and want to test locally over HTTPS, browsers like Chrome throw up warning pages because your self-signed certs aren’t trusted. I heard about mkcert and wanted to see if I could use it to create a trusted local CA and fix that problem.

First, you have to install mkcert. On a Mac, you can use Homebrew with brew install mkcert. For Linux, you can use apt, yum, or build from source, and Windows users can use Chocolatey or Scoop.

Once installed, you run mkcert install, which adds a local CA to your system’s trust store, so Chrome will recognize certificates you create with mkcert. Then, run mkcert localhost to generate a key and cert for localhost. I set up my Python Docker dev server to use the new cert and key, and, after a bit of fiddling to get the right files in place, it worked.

When I visited https://localhost:4443, there was no Chrome warning and I saw the green lock, which means the connection is secure and the certificate is valid. So, if you are tired of browser warnings during local development, mkcert is a quick way to set up a system-trusted CA and generate certs for local testing. Just be sure to use it only for local work and not in production, since this CA is trusted only on your machine.

Now I can get back to my other tasks knowing my dev server is running securely without any annoying warnings.