Certify SSL Manager manage free https certificates for IIS

News: V4.0 released: wildcard domain support, DNS validation plus lots more Read More..

The SSL Certificate Manager for Windows, powered by Let's Encrypt

Easily install and auto-renew free SSL/TLS certificates from letsencrypt.org for your IIS server. Setting up https has never been easier.

The app is free for a limited number of managed certificates per server. If you want to manage many certificates (or you just want to support development) you can purchase an upgrade key. Special terms may apply for OSS project contributors and registered charities (discretionary and applies to charities with less than $1M USD of annual funding/income per your most recent financial year).

Certify SSL Manager is used by more than 70,000 people and organisations around the world, including:


Version 4.0.8

Latest stable release
Download 4.0.8

Minimum Requirements: Windows Server 2008 R2 SP1 (64-bit) or higher with .Net 4.6.2 or higher.

Digitally Signed as Publisher 'Webprofusion Pty Ltd'

File SHA256 as generated by certutil -hashfile SHA256: 347fe86700346cb1ebe38ca67d296eb18e236af43056e32fb874ef7b8b2d6591

V4.0.8: Released 2018/08/15
  • Improve UI behaviour and avoid exceptions when IIS is not installed
V4.0.7: Released 2018/08/14
  • Fix account change after registering new contact
V4.0.6: Released 2018/08/13
  • Ensure current account key in use after version upgrades
  • Fix possible service exceptions/service stopping while querying cert bindings during cert cleanup.
  • Logging improvements and add additional logging for exceptions.
V4.0.5: Released 2018/07/31
  • Bug fix: re-use existing https port when non-standard port in use.
  • Improvements to background service startup.
V4.0.4: Released 2018/07/25
  • New UI changes to support a new wider range of features
  • New deployment modes and Preview feature to see what actions the app plans to perform.
  • Wildcard domain certificate support (*.example.com)
  • Let's Encrypt ACME V2 API compatibility
  • DNS Validation support for a range of DNS providers
  • Credentials manager to store and re-use DNS provider API credentials

Please backup your c:\programdata\certify\ folder before updating between major versions.

(no current beta)

Latest beta release
There is no current beta release.


This software is provided "as is", without warranty of any kind, express or implied, including but not limited to the warranties of merchantability, fitness for a particular purpose and noninfringement. In no event shall the authors or copyright holders be liable for any claim, damages or other liability, whether in an action of contract, tort or otherwise, arising from, out of or in connection with the software or the use or other dealings in the software.

Got feedback?
Email Us or file issues on GitHub

Note: Our app is Open Source (https://github.com/webprofusion/certify). Amongst other libraries it uses the awesome ACMESharp library project by Eugene Bekker and ACMESharp contributors, which is licensed under MPL 2.0