Before you print
How big should it be?
Rule of thumb: printed width ≥ scanning distance ÷ 10. Pick the surface above and the studio sizes the code for you, then checks the printed module size against what a press can actually hold.
Questions people actually ask
Three: ssh:// URLs (ssh://git@host/path), scp-style remotes (git@github.com:org/repo.git), and https links ending in .git. Whatever you paste is encoded verbatim, so the scan yields a string ready for git clone.
Conference slides, hackathon posters, lab onboarding docs, and workshop handouts — anywhere someone wants to grab your repo without typing a fiddly remote by hand. It is the developer equivalent of a business card.
An https .git link opens in the browser; ssh:// and git@ remotes show as text to copy. The natural flow is scan on the phone, share or copy to the laptop, then git clone.
No. The code contains only the remote address you typed — never keys, passwords, or tokens. Access to the repository is still controlled by the host exactly as before, and the code is generated locally in your browser, free with no signup.
Want the detail? How ssh / git url QR codes work — the payload format, what scanners do with it, and where it breaks.