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

How to install.

Documentation is hosted live at https://go-acme.github.io/lego/.

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	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.