simple command line tool to check or monitor your https certificate

Carl Hubay _verified_ Jun 2026

We hate it because it’s bureaucracy. But Carl knew that scale requires standards. Without a cover sheet, you get chaos. You get "shadow IT." You get people using Google Docs for databases.

Given the lack of information, let's assume Carl Hubay was a significant figure in environmental science, a field crucial for our understanding and preservation of the planet. carl hubay

Carl Hubay Was Right: Why the "Jump to Conclusions Mat" is the Productivity Tool We Actually Need We hate it because it’s bureaucracy

Perhaps the most significant contribution made to the hobby was his obsessive commitment to authenticity. In the 1960s and 70s, the market was flooded with "trimmed" cards—cards that had their rough edges cut down to appear "mint." You get "shadow IT

Today, Carl Hubay remains a figure shrouded in mystery. His music, if it still exists, is lost to the ages, and his true intentions and abilities remain a topic of debate. However, his legacy lives on as a testament to the power of music and the human mind.

Frank Nagy once famously said, "There are collectors, and then there is Carl Hubay. Carl sees the card the way the printer saw it."

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deployed on AWS Lambda

Install Locally

Great for checking lots of sites, scripting or use with private servers

Docker

docker run --rm szazeski/checkssl checkssl.org

Linux or Mac

wget https://github.com/szazeski/checkssl/releases/download/v0.5.0/checkssl_0.5.0_$(uname -s)_$(uname -m).tar.gz -O checkssl.tar.gz && tar -xf checkssl.tar.gz && chmod +x checkssl && sudo mv checkssl /usr/bin/

Mac via Mac Ports

sudo port install checkssl

Mac via Homebrew

brew install szazeski/tap/checkssl

Windows Powershell

Invoke-WebRequest https://github.com/szazeski/checkssl/releases/download/v0.5.0/checkssl_0.5.0_Windows_x86_64.tar.gz -outfile checkssl.tar.gz; tar -xzf checkssl.tar.gz; echo "if you want, move the file to a PATH directory like WINDOWS folder"

View github installation instructions for how to install on mac and windows

Download Releases for Windows, Mac, or Linux

View Source / Contribute New Features

Checkssl is an open source project that you can modify and use for your personal or commercial projects.

Goto checkssl on Github

Written in Go under a MIT License

Jenkins Continuous Integration Setup

Simple, no dependency command that integrates into your CI workflows

Add a build step with Execute Script

Build
Command

See the list of available environment variables

Other Tools to Check Out

Let's Encrypt is great way to generate free SSL certificates for your server

Qualsys SSL Lab produces detailed report of your SSL Certificate, ciphers and vulnerabilities.

Mozilla SSL Config produces ideal SSL config for various web servers.

BadSSL maintains testing servers with various issues, great for testing your monitoring setup

Illustrated TLS Connection every byte of a TLS connection explained and reproduced.

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