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	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.