Automatic Certificates and HTTPS for everyone.

Lego

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

lego is an independent, free, and open-source project, if you value it, consider supporting it! ❤️

Everybody thinks that the others will donate, but in the end, nobody does.

So if you think that lego is worth it, please consider donating.

Features

• ACME v2 RFC 8555
  • Support RFC 8737: TLS Application‑Layer Protocol Negotiation (ALPN) Challenge Extension
  • Support RFC 8738: certificates for IP addresses
  • Support RFC 9773: Renewal Information (ARI) Extension
  • Support draft-ietf-acme-profiles-00: Profiles Extension
• Comes with about 180 DNS providers
• Register with CA
• Obtain certificates, both from scratch or with an existing CSR
• Renew certificates
• Revoke certificates
• Robust implementation of ACME challenges:
  • HTTP (http-01)
  • DNS (dns-01)
  • TLS (tls-alpn-01)
• SAN certificate support
• CNAME support by default
• 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.

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

35.com/三五互联	Active24	Akamai EdgeDNS	Alibaba Cloud DNS
AlibabaCloud ESA	all-inkl	Alwaysdata	Amazon Lightsail
Amazon Route 53	Anexia CloudDNS	ArtFiles	ArvanCloud
Aurora DNS	Autodns	Axelname	Azion
Azure (deprecated)	Azure DNS	Baidu Cloud	Beget.com
Binary Lane	Bindman	Bluecat	Bluecat v2
BookMyName	Brandit (deprecated)	Bunny	Checkdomain
Civo	Cloud.ru	CloudDNS	Cloudflare
ClouDNS	CloudXNS (Deprecated)	ConoHa v2	ConoHa v3
Constellix	Core-Networks	CPanel/WHM	Czechia
DDnss (DynDNS Service)	Derak Cloud	deSEC.io	Designate DNSaaS for Openstack
Digital Ocean	DirectAdmin	DNS Made Easy	DNSExit
dnsHome.de	DNSimple	DNSPod (deprecated)	Domain Offensive (do.de)
Domeneshop	DreamHost	Duck DNS	Dyn
DynDnsFree.de	Dynu	EasyDNS	EdgeCenter
Efficient IP	Epik	Exoscale	External program
F5 XC	freemyip.com	FusionLayer NameSurfer	G-Core
Gandi	Gandi Live DNS (v5)	Gigahost.no	Glesys
Go Daddy	Google Cloud	Google Domains	Gravity
Hetzner	Hosting.de	Hosting.nl	Hostinger
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	Ionos Cloud	IPv64
ISPConfig 3	ISPConfig 3 - Dynamic DNS (DDNS) Module	iwantmyname (Deprecated)	JD Cloud
Joker	Joohoi's ACME-DNS	KeyHelp	Leaseweb
Liara	Lima-City	Linode (v4)	Liquid Web
Loopia	LuaDNS	Mail-in-a-Box	ManageEngine CloudDNS
Manual	Metaname	Metaregistrar	mijn.host
Mittwald	myaddr.{tools,dev,io}	MyDNS.jp	MythicBeasts
Name.com	Namecheap	Namesilo	NearlyFreeSpeech.NET
Neodigit	Netcup	Netlify	Nicmanager
NIFCloud	Njalla	Nodion	NS1
Octenium	Open Telekom Cloud	Oracle Cloud	OVH
plesk.com	Porkbun	PowerDNS	Rackspace
Rain Yun/雨云	RcodeZero	reg.ru	Regfish
RFC2136	RimuHosting	RU CENTER	Sakura Cloud
Scaleway	Selectel	Selectel v2	SelfHost.(de|eu)
Servercow	Shellrent	Simply.com	Sonic
Spaceship	Stackpath	Syse	Technitium
Tencent Cloud DNS	Tencent EdgeOne	Timeweb Cloud	TodayNIC/时代互联
TransIP	UKFast SafeDNS	Ultradns	United-Domains
Variomedia	VegaDNS	Vercel	Versio.[nl|eu|uk]
VinylDNS	Virtualname	VK Cloud	Volcano Engine/火山引擎
Vscale	Vultr	webnames.ca	webnames.ru
Websupport	WEDOS	West.cn/西部数码	Yandex 360
Yandex Cloud	Yandex PDD	Zone.ee	ZoneEdit
Zonomi

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