CertMagic – Caddy's automagic HTTPS features as a Go library

In plain words

CertMagic is a Go library that provides automatic HTTPS certificate management features extracted from the Caddy web server. It handles the complex tasks of obtaining, renewing, and managing SSL/TLS certificates programmatically. Developers building Go applications can integrate CertMagic to add production-ready HTTPS support without manually managing certificate lifecycles. The library automates certificate provisioning and renewal, making it useful for anyone building Go-based web services or applications that need reliable encryption.

written from the facts on this page · September 2026

• 
  Caddy, a cross-platform HTTP/2 web server2015 · caddyserver.com · ▲208

  Caddy is a powerful, enterprise-ready, open source web server with automatic HTTPS written in Go

• C2
  Caddy 22020 · caddyserver.com · ▲778

  Caddy is a powerful, enterprise-ready, open source web server with automatic HTTPS written in Go

• 
  Caddy-SSH2022 · caffeinatedwonders.com · ▲280

  Caddy-SSH is a general-purpose, memory-safe SSH server built in Go

• 
  Kubernetes Certificate Manager – Native Let's Encrypt Integration2016 · github.com · ▲186

  Manage Lets Encrypt certificates for a Kubernetes cluster. - kelseyhightower/kube-cert-manager

• 
  Caddy v2.5.02022 · github.com · ▲269

  Fast and extensible multi-platform HTTP/1-2-3 web server with automatic HTTPS - Release v2.5.0 · caddyserver/caddy

• 
  Caddy 22020 · caddyserver.com · ▲4

  Open source web server with automatic HTTPS written in Go

• 
  SimCity, but with Permits▲904

  A free city-building game in your browser. You are the mayor. You know what the city needs. Now get it past the zoning board, the neighbors, the appeals court and the next election.

  Life & fun · 1d ago · permit.petercai.com

• IV
  I've been paying for a rural Tanzanian's education for 10 years▲778

  Life & fun · 13d ago · tanzaniaeducationproject.org

• 
  Bigwords.page – Turn any screen into a sign. The URL is the app▲728

  Turn a phone, tablet or TV into a sign. Type a message and it fills the screen: welcome signs, timers, Wi-Fi passwords and more. No app, no account, free.

  Life & fun · 14d ago · bigwords.page

• 
  Guitoro, a virtual guitar you strum with your keyboard▲573

  Play a free virtual guitar online with your keyboard or by touch. Slow songs down and see every chord, string and strum. Acoustic, classic, electric and bass.

  Life & fun · 8d ago · guitoro.com

• 
  See *almost* any carriers phone settings▲432

  Carrier settings from iPhone, Pixel and Galaxy firmware, decoded and compared: APNs, VoLTE, 5G and Wi-Fi Calling per carrier, and what each build changed.

  Life & fun · 12d ago · carrierexplode.com

• 
  The whole Solar System and every tracked satellite, live in the browser▲407

  Life & fun · 22d ago · space.bl2.net

• 
  remove.bg▲2,028

  Remove image backgrounds automatically in 5 seconds with just one click. Don't spend hours manually picking pixels. Upload your photo now & see the magic.

  Work · 2018 · remove.bg

• 
  Humaaans▲1,592

  Mix-&-match illustrations of humans with a design library.

  Growth · 2018 · humaaans.com

• 
  Refactoring UI: The Book▲822

  Make your ideas look awesome, without relying on a designer

  Life & fun · 2018 · refactoringui.com

• 
  The Y Combinator Database 2.0▲604

  Everything you ever wanted to know about YC companies

  Growth · 2018 · ycdb.co

• 
  Ouch! Illustrations▲590

  Free illustrations for better UX

  Growth · 2018 · icons8.com

• 
  Visa List 1.0▲576

  Know where you can travel with your passport tension free ✈️

  Life & fun · 2018 · visalist.io