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-03: Renewal Information (ARI) Extension
  • Support draft-aaron-acme-profiles-00: Profiles Extension
• Comes with about 150 DNS providers
• Register with CA
• Obtain certificates, both from scratch or with an existing CSR
• Renew certificates
• Revoke certificates
• Robust implementation of ACME challenges:
  • HTTP (http-01)
  • DNS (dns-01)
  • TLS (tls-alpn-01)
• SAN certificate support
• CNAME support by default
• 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.

Active24	Akamai EdgeDNS	Alibaba Cloud DNS	all-inkl
Amazon Lightsail	Amazon Route 53	ArvanCloud	Aurora DNS
Autodns	Azure (deprecated)	Azure DNS	Bindman
Bluecat	BookMyName	Brandit (deprecated)	Bunny
Checkdomain	Civo	Cloud.ru	CloudDNS
Cloudflare	ClouDNS	CloudXNS (Deprecated)	ConoHa
Constellix	Core-Networks	CPanel/WHM	Derak Cloud
deSEC.io	Designate DNSaaS for Openstack	Digital Ocean	DirectAdmin
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	F5 XC
freemyip.com	G-Core	Gandi	Gandi Live DNS (v5)
Glesys	Go Daddy	Google Cloud	Google Domains
Hetzner	Hosting.de	Hosttech	HTTP request
http.net	Huawei Cloud	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	Lima-City	Linode (v4)	Liquid Web
Loopia	LuaDNS	Mail-in-a-Box	ManageEngine CloudDNS
Manual	Metaname	Metaregistrar	mijn.host
Mittwald	myaddr.{tools,dev,io}	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	Rain Yun/雨云	RcodeZero
reg.ru	Regfish	RFC2136	RimuHosting
Sakura Cloud	Scaleway	Selectel	Selectel v2
SelfHost.(de|eu)	Servercow	Shellrent	Simply.com
Sonic	Spaceship	Stackpath	Technitium
Tencent Cloud DNS	Timeweb Cloud	TransIP	UKFast SafeDNS
Ultradns	Variomedia	VegaDNS	Vercel
Versio.[nl|eu|uk]	VinylDNS	VK Cloud	Volcano Engine/火山引擎
Vscale	Vultr	Webnames	Websupport
WEDOS	West.cn/西部数码	Yandex 360	Yandex Cloud
Yandex PDD	Zone.ee	Zonomi

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