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-01: 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)	AzureDNS	Bindman	Bluecat
Brandit	Bunny	Checkdomain	Civo
CloudDNS	Cloudflare	ClouDNS	CloudXNS
ConoHa	Constellix	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 Labs	Gandi Live DNS (v5)
Gandi	Glesys	Go Daddy	Google Cloud
Google Domains	Hetzner	Hosting.de	Hosttech
HTTP request	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
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	Servercow	Simply.com	Sonic
Stackpath	Tencent Cloud DNS	TransIP	UKFast SafeDNS
Ultradns	Variomedia	VegaDNS	Vercel
Versio.[nl/eu/uk]	VinylDNS	VK Cloud	Vscale
Vultr	Websupport	WEDOS	Yandex Cloud
Yandex PDD	Zone.ee	Zonomi

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