Automatic Certificates and HTTPS for everyone.

Lego

Let's Encrypt client and ACME library 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-aaron-acme-profiles-00: Profiles Extension
• Comes with about 170 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.

Active24	Akamai EdgeDNS	Alibaba Cloud DNS	all-inkl
Amazon Lightsail	Amazon Route 53	Anexia CloudDNS	ArvanCloud
Aurora DNS	Autodns	Axelname	Azion
Azure (deprecated)	Azure DNS	Baidu Cloud	Beget.com
Binary Lane	Bindman	Bluecat	BookMyName
Brandit (deprecated)	Bunny	Checkdomain	Civo
Cloud.ru	CloudDNS	Cloudflare	ClouDNS
CloudXNS (Deprecated)	ConoHa v2	ConoHa v3	Constellix
Core-Networks	CPanel/WHM	Derak Cloud	deSEC.io
Designate DNSaaS for Openstack	Digital Ocean	DirectAdmin	DNS Made Easy
dnsHome.de	DNSimple	DNSPod (deprecated)	Domain Offensive (do.de)
Domeneshop	DreamHost	Duck DNS	Dyn
DynDnsFree.de	Dynu	EasyDNS	Efficient IP
Epik	Exoscale	External program	F5 XC
freemyip.com	G-Core	Gandi	Gandi Live DNS (v5)
Glesys	Go Daddy	Google Cloud	Google Domains
Hetzner	Hosting.de	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	IPv64	iwantmyname	Joker
Joohoi's ACME-DNS	KeyHelp	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	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	Technitium
Tencent Cloud DNS	Tencent EdgeOne	Timeweb Cloud	TransIP
UKFast SafeDNS	Ultradns	Variomedia	VegaDNS
Vercel	Versio.[nl|eu|uk]	VinylDNS	VK Cloud
Volcano Engine/火山引擎	Vscale	Vultr	Webnames
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.