Automatic Certificates and HTTPS for everyone.

Lego

Let's Encrypt client and ACME library written in Go.

Features

• ACME v2 RFC 8555
• 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
• 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	Bindman	Bluecat	Checkdomain
CloudDNS	Cloudflare	ClouDNS	CloudXNS
ConoHa	Constellix	deSEC.io	Designate DNSaaS for Openstack
Digital Ocean	DNS Made Easy	DNSimple	DNSPod
Domain Offensive (do.de)	Domeneshop	DreamHost	Duck DNS
Dyn	Dynu	EasyDNS	Epik
Exoscale	External program	freemyip.com	G-Core Labs
Gandi Live DNS (v5)	Gandi	Glesys	Go Daddy
Google Cloud	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	iwantmyname
Joker	Joohoi's ACME-DNS	Linode (v4)	Liquid Web
Loopia	LuaDNS	Manual	MyDNS.jp
MythicBeasts	Name.com	Namecheap	Namesilo
NearlyFreeSpeech.NET	Netcup	Netlify	Nicmanager
NIFCloud	Njalla	NS1	Open Telekom Cloud
Oracle Cloud	OVH	Porkbun	PowerDNS
Rackspace	reg.ru	RFC2136	RimuHosting
Sakura Cloud	Scaleway	Selectel	Servercow
Simply.com	Sonic	Stackpath	Tencent Cloud DNS
TransIP	UKFast SafeDNS	Variomedia	VegaDNS
Vercel	Versio.[nl/eu/uk]	VinylDNS	Vscale
Vultr	WEDOS	Yandex	Zone.ee
Zonomi

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