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.

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	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
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.