1bpp's comment suggesting this yesterday: https://news.ycombinator.com/item?id=48682460

This is absolute black magic. I never realized OpenType rules were powerful enough to render something as complex as a QR matrix inline.

That's a wonderfully cursed idea.

This is terrifying, great job!

Wow. This is so freaking cool.

See https://github.com/jimparis/qr-font/blob/master/design.md for the actual design. As who have written a QR code encoder library... I'm in shock and awe.

Side question: Why is nobody making QR codes on web pages clickable (regardless if it’s an image or text-based)? Not every QR code represents a URL, of course, but many do. Maybe there should be a qrcode URL scheme that lets browsers behave the same way as a camera scanning a QR code.

Selecting parts of the code (in F7 mode or with SHIFT-LEFT/RIGHT) highlights which individual pixels corresponds to the actual letters.