Automatic Certificates and HTTPS for everyone.

Lego

Let's Encrypt client and ACME library written in Go.

Features

• ACME v2 RFC 8555
  • Support RFC 8737: TLS Application‑Layer Protocol Negotiation (ALPN) Challenge Extension
  • Support RFC 8738: certificates for IP addresses
  • Support draft-ietf-acme-ari-01: Renewal Information (ARI) Extension
• Register with CA
• Obtain certificates, both from scratch or with an existing CSR
• Renew certificates
• Revoke certificates
• Robust implementation of all ACME challenges
  • HTTP (http-01)
  • DNS (dns-01)
  • TLS (tls-alpn-01)
• SAN certificate support
• CNAME support by default
• Comes with multiple optional DNS providers
• Custom challenge solvers
• Certificate bundling
• OCSP helper function

Installation

How to install.

Usage

• as a CLI
• as a library

Documentation

Documentation is hosted live at https://go-acme.github.io/lego/.

DNS providers

Detailed documentation is available here.

Akamai EdgeDNS	Alibaba Cloud DNS	all-inkl	Amazon Lightsail
Amazon Route 53	ArvanCloud	Aurora DNS	Autodns
Azure (deprecated)	Azure DNS	Bindman	Bluecat
Brandit	Bunny	Checkdomain	Civo
Cloud.ru	CloudDNS	Cloudflare	ClouDNS
CloudXNS	ConoHa	Constellix	Derak Cloud
deSEC.io	Designate DNSaaS for Openstack	Digital Ocean	DNS Made Easy
dnsHome.de	DNSimple	DNSPod (deprecated)	Domain Offensive (do.de)
Domeneshop	DreamHost	Duck DNS	Dyn
Dynu	EasyDNS	Efficient IP	Epik
Exoscale	External program	freemyip.com	G-Core
Gandi Live DNS (v5)	Gandi	Glesys	Go Daddy
Google Cloud	Google Domains	Hetzner	Hosting.de
Hosttech	HTTP request	Hurricane Electric DNS	HyperOne
IBM Cloud (SoftLayer)	IIJ DNS Platform Service	Infoblox	Infomaniak
Internet Initiative Japan	Internet.bs	INWX	Ionos
IPv64	iwantmyname	Joker	Joohoi's ACME-DNS
Liara	Linode (v4)	Liquid Web	Loopia
LuaDNS	Manual	Metaname	MyDNS.jp
MythicBeasts	Name.com	Namecheap	Namesilo
NearlyFreeSpeech.NET	Netcup	Netlify	Nicmanager
NIFCloud	Njalla	Nodion	NS1
Open Telekom Cloud	Oracle Cloud	OVH	plesk.com
Porkbun	PowerDNS	Rackspace	RcodeZero
reg.ru	RFC2136	RimuHosting	Sakura Cloud
Scaleway	Selectel	Servercow	Simply.com
Sonic	Stackpath	Tencent Cloud DNS	TransIP
UKFast SafeDNS	Ultradns	Variomedia	VegaDNS
Vercel	Versio.[nl/eu/uk]	VinylDNS	VK Cloud
Vscale	Vultr	Websupport	WEDOS
Yandex 360	Yandex Cloud	Yandex PDD	Zone.ee
Zonomi

If your DNS provider is not supported, please open an issue.