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What is Let's Encrypt and how it works

Learn what Let's Encrypt is, how it issues free SSL certificates and why it has become so important for HTTPS.

Published: 28/06/2026Updated: 28/06/2026

Introduction

Let’s Encrypt is a certificate authority that issues free SSL certificates so domains and websites can use HTTPS.

Its popularity has helped many more websites adopt encrypted connections without adding certificate costs.

Conclusion

Let’s Encrypt has played a major role in expanding HTTPS across the web. In many hosting environments it works together with automated tools such as AutoSSL.