Let’s Encrypt Wildcard Certificates Are Now Available ![rw-book-cover]() 🔗 **Source:** [Let’s Encrypt Wildcard Certificates Are Now Available](https://wptavern.com/lets-encrypt-wildcard-certificates-are-now-available) > [!note]+ Document Notes > --- > tags: [lets-encrypt, security, ssl, wildcard, wp-tavern-archive, wp-tavern-2018] > author: Jeff Chandler > source: WP Tavern > reference: https://wptavern.com/lets-encrypt-wildcard-certificates-are-now-available > date created: 2026-04-17 11:28 > --- > # Let's Encrypt Wildcard Certificates Are Now Available > ## 📝 Summary > - Let's Encrypt announced that Wildcard certificate support is now live, along with an update to its ACME protocol to version 2.0. > - Wildcard certificates allow site administrators to secure all subdomains with a single certificate, which is especially convenient for WordPress Multi-site networks. > - Let's Encrypt is securing nearly 70 million domains with 54 million certificates, up from 47 million domains in July 2017. > - Let's Encrypt has launched free wildcard certificates to advance its mission of making 100% of the web HTTPS. > ## 💬 Comments (0) > No comments. > --- In July of last year, [Let's Encrypt](https://letsencrypt.org/) announced that it would begin [issuing Wildcard certificates](https://letsencrypt.org/2017/07/06/wildcard-certificates-coming-jan-2018.html) for free in January of 2018. Although a little late, the organization [has announced](https://community.letsencrypt.org/t/acme-v2-and-wildcard-certificate-support-is-live/55579) that Wildcard certificate support is now live. In addition to these certificates, the organization has updated its [ACME protocol](https://datatracker.ietf.org/wg/acme/about/) to version 2.0. ACMEv2 is required for clients that want to use Wildcard certificates. Wildcard certificates enable site administrators to secure all sub domains with a single certificate. This can be especially convenient for WordPress Multi-site networks. Let's Encrypt is working on transitioning all clients and subscribers to ACMEv2, though it hasn't set a time table on when it will expire the ACMEv1 API. In July of 2017, Let's Encrypt was securing 47 million domains. Today, the organization is [securing nearly 70 million domains with 54 million certificates](https://letsencrypt.org/stats/). In the United States, nearly 80% of sites loaded in Firefox are through HTTPS. Let's Encrypt is an open certificate authority that's part of the non-profit [Internet Security Research Group](https://letsencrypt.org/isrg/). It's mission is to make 100% of the web HTTPS. Operations are financed through sponsors and donations. If this is a mission you believe in, please consider [donating](https://letsencrypt.org/donate/) to the project. Category: [News](https://wptavern.com/category/news)Tags: [let’s encrypt](https://wptavern.com/tag/lets-encrypt), [security](https://wptavern.com/tag/security), [ssl](https://wptavern.com/tag/ssl), [wildcard](https://wptavern.com/tag/wildcard), Let’s Encrypt Wildcard Certificates Are Now Available, Jeff Chandler, 01kpe0x0n00e1xfqfgwc7d1chd.