OCTAL QR labels

Paste your study's link, type the participant codes, then download or print one QR label per participant. Each QR code opens the study link with that participant's code already filled in. Works for any OCTAL study.

Everything happens in your browser. The codes you type are not sent or stored anywhere; only the study link is remembered on this computer for next time.

1. Study link

Default links:

The link participants open, without the code

Paste the study's link once. If it ends in pid=, the code is added straight after it; otherwise ?pid= is added for you.

2. Participant codes

One code per line

Letters, numbers, - and _ only. You can also paste full links; the code after pid= is used.

3. Label size

Label width (mm)

Label height (mm)

Use the size of one label on your roll. The QR code is centred on the label; nothing else is printed.

Before sending a pack, scan the printed label with a phone and check the code after pid= in the link that opens. The code is shown below on screen only; it is not printed on the label.

Labels appear here as you type.