# win-acme/win-acme

Automate SSL/TLS certificates on Windows with ease

Repository: https://github.com/win-acme/win-acme
Canonical: https://ross.abutalabs.com/products/win-acme
Homepage: https://www.win-acme.com/
Language: C#
License: Apache-2.0
License Family: permissive
Topics: acme, certificates, windows, iis, exchange, rds, winrm, acme-v2, cli, csharp
Last push: 2026-06-09T09:42:13+00:00

## Health v2 (maintenance only)
Score: 62/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 86, release rhythm 8, longevity 100
- inputs: {"age_days": 3947, "days_push": 85, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 5787, forks 869 (observed 2026-08-28T04:09:29.605290+00:00)

## What it is
win-acme is an ACMEv2 client for Windows that automates obtaining and installing SSL/TLS certificates from Let's Encrypt, ZeroSSL, and other ACME-compatible certificate authorities. It offers a simple interactive interface for IIS as well as advanced command-line and plugin-based automation for scenarios like Exchange, Apache, and DNS validation.

## Use cases
- automatically obtain and renew Let's Encrypt certificates on Windows
- install SSL certificates on IIS with automatic binding updates
- get wildcard certificates using DNS validation with Cloudflare or Route53
- unattended certificate automation via scheduled tasks and command line
- manage certificates for Exchange Server or Remote Desktop Services
- store certificates as .pem, .pfx, in the IIS Central Store, or Azure KeyVault

## When to choose
- you run IIS, Exchange, or other Windows servers and need automated TLS certificate lifecycle management
- you want a free, unattended ACME client with rich validation and storage plugins
- you need wildcard or internationalized domain certificates on Windows

## When to avoid
- you need certificates on Linux or macOS (use certbot or similar instead)
- you want a GUI-only experience without any command-line interaction
- your infrastructure is not Windows-based or not reachable from a Windows host

## Facets
- artifact type: cli-tool
- maturity: active
- function: security, cryptography, cli, workflow-automation, configuration-management
- domain: security, web-development, windows
- platform: windows, cli, dotnet
- tags: acme, acmev2, lets-encrypt, ssl-tls, certificates, iis, exchange, certificate-renewal, zerossl, scheduled-task, devops, automation

## Member repositories
- win-acme/win-acme (main) score 62

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:09:29.605290+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T17:52:49.388156+00:00, confidence not recorded.
  - readme: https://github.com/win-acme/win-acme (fetched 2026-08-28T04:09:29.605290+00:00, sha 7ada8893629c)
  - homepage: https://www.win-acme.com/ (fetched 2026-08-29T08:48:05.783639+00:00, sha 6fc29584bcb7)
  - site_page: https://www.win-acme.com/manual/getting-started (fetched 2026-08-29T08:48:05.792787+00:00, sha 118bb302f4f2)
- Data as of 2026-08-30T08:39:29.467469+00:00.