# Set up HTTPS for the dev server

With a valid HTTP server, you can let the other devices access your dev server, with features only available to HTTPS.

You can use [localhost.direct](https://get.localhost.direct) certificate for set up local HTTPS server. Any vaild certificate is also allowed.

Download the certs and unpack them. In this document we put them under "tools/cert/".

Create or edit the file ".env.local", this file is ignored by git. Copy the content from ".env":

```env
DEV_SERVER_HTTPS_CERT_BASE=
DEV_SERVER_HTTPS_CERT_PASS=
```

The `DEV_SERVER_HTTPS_CERT_BASE` is the basename for your cert. The cert includes two files to work: one's suffix is `.key`, the another is `.crt`. The base is the common part of them.

If you have files "tools/cert/localhost.direct.key" and "tools/cert/localhost.direct.crt", the value you need is "tools/cert/localhost.direct".

The `DEV_SERVER_HTTPS_CERT_PASS` is the password to unlock the key. For the localhost.direct, it's `localhost`.

Here is an example:

```env
DEV_SERVER_HTTPS_CERT_BASE=tools/cert/localhost.direct
DEV_SERVER_HTTPS_CERT_PASS=localhost
```