This is an example of what's happening:
1. I copy my BTC address
2. I paste it in their site and click GENERATE
3. Booom! It automatically change the address I paste to 32ueQev4wTXHmWGpR1GkTVfhABdw1xeBrf
4.
IMPORTANT: Not only that, my address which I copied was changed to that address too (double kill if you'll just paste again that address without checking and make a transaction)
Another thing, when I used it for ethereum, I saved the code and surprised that I got bitcoin qr code with their address. That was pretty obvious and nobody will fall for that, however, not the same case when someone generates a bitcoin qr code and didn't check. Here's the address I got when I generate eth qr code (
there are several incoming transactions):
https://www.blockchain.com/btc/address/1MjyQCJntvFDRptG7jq3UUUWyJUQ49kPK7 Always be extra careful and don't forget to double check everything!
EDIT: I've tried the website just to test. Not saying that this site is legit, but it seems to be showing the correct QR code(both the QR code displayed, and the QR code downloaded) as the address I've entered. Only tried it once though.
It is selective. There are times that it shows the right address and other times a wrong address. Have been discussed
here too before.