Scale down a QR Code into it's original pixel size

Question

I'm trying to find a way to scale down a QR Code into it's original pixel size without losing data.

QR Code Version 1 Contains 21x21 Pixels but a lot of the generated QR Codes are scaled up to 200x200 or 300x300 pixels.

I'm trying to scale down the 200x200 or 300x300 into 21x21 without data loss.

I tried searching about how to scale down a qrcode but I didn't find any useful information.