simple command line tool to check or monitor your https certificate

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CheckSSL has marked this as a pass result CheckSSL has marked this as a fail result

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

Incredibox Mod Maker Extra Quality May 2026

"Get ready to unleash your creativity with Incredibox Mod Maker Extra Quality! This amazing tool allows you to craft and customize your own unique Incredibox mods, bringing a whole new level of excitement to the classic music game. With its user-friendly interface and extensive library of sounds and beats, you'll be able to create mods that showcase your artistic skills and musical flair. Take your Incredibox experience to the next level with Extra Quality mods that boast crystal-clear audio and seamless gameplay. Join the community of talented modders and share your creations with the world - the possibilities are endless with Incredibox Mod Maker Extra Quality!"

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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