npm start -- --secure

Snowpack provides an easy way to use a local HTTPS server during development through the use of the --secure flag. When enabled, Snowpack will look for a snowpack.key and snowpack.crt file in the root directory and use that to create an HTTPS server with HTTP2 support enabled.

Generating SSL Certificates#

You can automatically generate credentials for your project via either:

• devcert (no install required): npx devcert-cli generate localhost
• mkcert (install required): mkcert -install && mkcert -key-file snowpack.key -cert-file snowpack.crt localhost

In most situations you should add personally generated certificate files (snowpack.key and snowpack.crt) to your .gitignore file.