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	Bunny	Checkdomain	Civo
Cloud.ru	CloudDNS	Cloudflare	ClouDNS
CloudXNS	ConoHa	Constellix	CPanel/WHM
Derak Cloud	deSEC.io	Designate DNSaaS for Openstack	Digital Ocean
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 Live DNS (v5)	Gandi	Glesys
Go Daddy	Google Cloud	Google Domains	Hetzner
Hosting.de	Hosttech	HTTP request	http.net
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	Linode (v4)
Liquid Web	Loopia	LuaDNS	Mail-in-a-Box
Manual	Metaname	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
RFC2136	RimuHosting	Sakura Cloud	Scaleway
Selectel v2	Selectel	Servercow	Shellrent
Simply.com	Sonic	Stackpath	Tencent Cloud DNS
TransIP	UKFast SafeDNS	Ultradns	Variomedia
VegaDNS	Vercel	Versio.[nl/eu/uk]	VinylDNS
VK Cloud	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.