CORS Proxy vs QR code

CORS Proxy is a small open-source Node.js server (54 GitHub stars) that forwards a POST request's urlToGet body param to the target URL server-side and relays the response back with permissive CORS headers, sidestepping browser CORS errors for GET-able resources. It is a deploy-it-yourself utility, not a hosted service — the README's old Heroku demo link is dead since Heroku retired free dynos in 2022, so it only works once cloned and deployed to your own host.

goQR.me's QR code API, served from api.qrserver.com rather than the marketing domain, offers two commands: create-qr-code renders a PNG, SVG, or EPS QR image from a data string, while read-qr-code decodes an existing QR image (by URL or upload) and returns the result as JSON. Run by Foundata GmbH, it imposes no request limit beyond reserving the right to reject abusive traffic, and it logs only the requesting referrer/IP, never the QR content itself.