Use it anywhere an image goes
Fair use
Each IP address can make 2 new codes a minute. After that you get a 429 and a Retry-After header.
The form on this page proves it is a real browser, which raises the limit to 10 new codes a minute.
A code that Cloudflare has already cached comes back instantly and usually doesn't count.
url- Required. The address to turn into a QR code. It must start with http or https and be at most 2000 characters.
size- Optional. A whole number of pixels from 128 to 1024. The default is 512.
- Answers
- A PNG when it works. A JSON message with a 400 when the address is wrong.