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
• 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 (deprecated)	Bunny	Checkdomain	Civo
Cloud.ru	CloudDNS	Cloudflare	ClouDNS
CloudXNS (Deprecated)	Combell	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	Manual	Metaname	mijn.host
Mittwald	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	Regfish
RFC2136	RimuHosting	Sakura Cloud	Scaleway
Selectel	Selectel v2	SelfHost.(de|eu)	Servercow
Shellrent	Simply.com	Sonic	Stackpath
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	Yandex 360	Yandex Cloud	Yandex PDD
Zone.ee	Zonomi

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