404 — the lab.

Small tools I build and give away. They run in your browser — no account, nothing uploaded.

SHEET 1Register
/qr 404.tf/qr

Your face is the QR code

A QR code that is a portrait: your face on a print-ready business card. Free, and the photo stays on your phone.
The printed card next to a pen for scale: a QR code of black dots forming a portrait.
First run: 500 cards, 60 × 60 mm.

Make your own card

/qrp2p qrp2p.net

Move a file through light (qrp2p.net)

A file goes from one screen to another phone's camera as a stream of QR codes. Nothing is uploaded, and it works offline after the first visit.
A screenshot of qrp2p.net: a QR code on a dark screen and a badge reading "live · frame 14".
The live demo at qrp2p.net: frame after frame.

Try it

/labelador labelador.com

Labelador — make it yours

Design your own labels with templates, icons, text and QR codes. No account needed: download the label as an image, or print it straight to a Niimbot M2-⁠H label printer from Chrome on a computer or Android.
A black-and-white jam label with a strawberry and the words “Homemade jam”, shown in Labelador next to the text box.
A label for homemade jam, ready to download.

Make a label

Things appear here only after they have been tested — that is why the list is short.