# win-acme

ACME client for Windows that obtains and renews TLS certificates from Let's Encrypt and other ACME services and installs them in IIS and other stores.


Source: https://findsoftware.frbit.cloud/win-acme/
Last reviewed: 2026-10-31
Listed since: 2026-10-31

## Record

### Links

- home: https://www.win-acme.com
- repository: https://github.com/win-acme/win-acme
- docs: https://www.win-acme.com/manual/getting-started

### Identity

- status: active
- maintainer: ZeroSSL
- maintainerType: company
- parent: unknown
- firstRelease: 2015
- hqCountry: unknown

### Kind

- category: web-server
- hosting: dotnet
- language: csharp
- runtime: dotnet
- runtimeMin: dotnet 7
- basedOn: unknown

### Content

- contentStore: not applicable
- databases: not applicable
- adminUi: not applicable
- headlessApi: not applicable
- templating: not applicable
- i18n: not applicable

### Rendering and deploy

- runsAs: scheduled
- renderingModes: not applicable
- installMethod: zip download, unpacked and run as wacs.exe

### License

- licenseModel: open-source
- license: Apache-2.0

### Releases

- currentMajor: 2
- latestReleaseDate: 2024-05-25

### Adoption

- githubStargazers: 5832
- packagistDownloads: not applicable
- npmWeeklyDownloads: not applicable
- contributors: 93
- pluginCount: unknown
- packagistMonthlyDownloads: unknown
- ecosystemsMonthlyDownloads: unknown
- httpArchiveSites: unknown
- wordpressActiveInstalls: unknown
- dependentRepos: unknown
- dependentPackages: unknown

### Sources

- urls: https://www.win-acme.com/ (read 2026-10-31)
- urls: https://api.github.com/repos/win-acme/win-acme (read 2026-10-31)
- urls: https://www.win-acme.com/manual/getting-started (read 2026-10-31)
- maintainer: https://github.com/win-acme/win-acme/blob/master/README.md (read 2026-10-31)
- maintainerType: https://github.com/win-acme/win-acme/blob/master/README.md (read 2026-10-31)
- firstRelease: https://github.com/win-acme/win-acme/releases/tag/v0.6 (read 2026-10-31)
- category: https://github.com/win-acme/win-acme/blob/master/README.md (read 2026-10-31)
- language: https://api.github.com/repos/win-acme/win-acme (read 2026-10-31)
- runtime: https://github.com/win-acme/win-acme/blob/master/README.md (read 2026-10-31)
- runtimeMin: https://github.com/win-acme/win-acme/blob/v2.2.9.1701/src/main/wacs.csproj (read 2026-10-31)
- runsAs: https://www.win-acme.com/manual/automatic-renewal (read 2026-10-31)
- installMethod: https://github.com/win-acme/win-acme/blob/master/README.md (read 2026-10-31)
- installMethod: https://github.com/win-acme/win-acme/blob/master/README.md (read 2026-10-31)
- license: https://api.github.com/repos/win-acme/win-acme (read 2026-10-31)
- licenseModel: https://github.com/win-acme/win-acme/blob/master/LICENSE (read 2026-10-31)
- currentMajor: https://github.com/win-acme/win-acme/releases/tag/v2.2.9.1701 (read 2026-10-31)
- latestReleaseDate: https://github.com/win-acme/win-acme/releases/tag/v2.2.9.1701 (read 2026-10-31)
- githubStargazers: https://api.github.com/repos/win-acme/win-acme (read 2026-10-31)
- contributors: https://api.github.com/repos/win-acme/win-acme/contributors?per_page=1 (read 2026-10-31)

## Notes

win-acme runs on Windows and requests certificates from Let's Encrypt and other ACME services for the sites on the machine. The [getting started guide](https://www.win-acme.com/manual/getting-started) asks for the program to be unzipped to a folder that stays in place, because the scheduled task runs from it. The homepage describes creating and installing certificates on a local IIS server.

A scheduled task renews the certificates. The [automatic renewal page](https://www.win-acme.com/manual/automatic-renewal) says the task runs every day and checks two conditions before it renews.

## Worth knowing

The README says ZeroSSL officially maintains the repository. A fork named simple-acme describes itself as a clone of this project.

The system requirements page limits the current build to recent Windows Server editions and lists older builds for older Windows releases.

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Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Attributes are recorded, never scored; absent means unknown.
Credit, in full: FindSoftware, CC BY 4.0