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	Axelname	Azure (deprecated)	Azure DNS
Baidu Cloud	Bindman	Bluecat	BookMyName
Brandit (deprecated)	Bunny	Checkdomain	Civo
Cloud.ru	CloudDNS	Cloudflare	ClouDNS
CloudXNS (Deprecated)	ConoHa v2	ConoHa v3	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	RU CENTER
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.