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Links, Wi-Fi, contact cards, email, SMS and locations — as a PNG or a print-ready SVG. Generated in your browser, so there is no redirect through anyone’s server that can be re-pointed, metered, or switched off after your poster is printed.
Version 3 · 29 × 29 modules · ~15% damage recoverable
SVG for print — it stays sharp at any size, which a 512px PNG on a poster will not.
The specification asks for a quiet zone of 4 modules. Trimming it looks tidier and makes the code harder for cameras to find — reduce it only when you know the scanning conditions.
Set what you want and the result appears as you go. Nothing needs uploading because there is nothing to upload — you are describing what to make, not sending us anything.
Your browser does all the work locally, using your own operating system where randomness is involved. Nothing is requested from a server, so nobody else has a copy of what you made.
Take the result to your clipboard or save it as a file. Nothing is kept — refresh the page and it’s gone, so save what you need before you leave.