Code Cardio

Interactive crash courses on the stuff around the code: Git, the terminal, SQL, HTTP & APIs, env vars, deploys, auth, Docker, packages, debugging, and the browser. No videos. One concept at a time. No longer than a workout.

Courses

• Git Gym: Git. Commit, branch, merge, push, and the commands that get you out of trouble. (free)
• Terminal Treadmill: The Terminal. Move around folders, chain commands with pipes, and fix "command not found". (free)
• SQL Squats: SQL. SELECT, JOIN, GROUP BY: Getting comfortable with queries.
• JSON Jumping Jacks: JSON & Data Formats. The shape of every API response and config file.
• HTTP Pushups: HTTP & APIs. Requests, responses, methods, status codes, and headers.
• Env Endurance: Environment Variables & Secrets. .env files, process.env, and why you never commit secrets.
• Deploy Deadlifts: DNS & Deploying. What happens between typing a URL and seeing your site.
• Auth Aerobics: Auth. Password hashing, sessions, JWTs, OAuth, and who's allowed to do what.
• Docker Dumbbells: Docker. Images, containers, Dockerfiles, ports, and volumes.
• Package Pilates: Packages & Dependencies. package.json, lockfiles, semver, and why it works on your machine.
• Debug Drills: Debugging & Errors. Read the stack trace, find the actual line, and stop guessing.
• Browser Burpees: HTML, CSS & the DOM. How a browser turns HTML, CSS, & JavaScript into a page.

$9.99 once, lifetime access to every paid course. Git and the terminal are free, no account.

FAQ

Is Code Cardio free?

Git Gym and Terminal Treadmill are free with no account. The other 10 courses are $9.99 once for lifetime access, including courses added later.

Do I need to install anything?

No. Each course runs a simulated environment in the browser: you type real commands and it responds. No video, nothing to install.

How long is a course?

Each course has 5 short modules and takes 30 to 45 minutes.

Who is it for?

Beginners, people who need a refresher, and people who build with AI but want the fundamentals behind it.

Can I get a refund?

Yes, refund requests within 7 days of purchase. See the terms page.