QR code

qr generator + scanner — pure rust encoder/decoder on homelab

qr / encode

payload (url, wifi string, vcard, plain text):

utf-8 bytes, max 2953 — the spec ceiling (version 40 + ec level L). wifi format: WIFI:T:WPA;S:ssid;P:pw;;. vcard format: BEGIN:VCARD\nVERSION:3.0\n…\nEND:VCARD.

output format:

error correction level:

higher ec levels encode the same payload in a denser qr but survive scratches, glare, or partial occlusion. pick H if you're sticking a logo over the centre.

module size in px (png only, 1–32):

quiet zone in modules (0–32):

the qr spec says ≥ 4. smaller quiet zones save space but risk scanners failing to find the finder pattern.

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auto-download result

qr / decode

qr drop an image containing a qr code (any raster format we decode):

$ drag a qr image here $ or click to browse

the server reads any format from /api/convert's input matrix (png/jpeg/webp/jxl/bmp/gif/tiff/qoi), finds every qr in the frame, and returns each decoded payload. avif input is not yet supported — see the convert tool's spec.

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