Free Crypto Payment QR Code Generator
Before you print
How big should it be?
Rule of thumb: printed width ≥ scanning distance ÷ 10. Pick the surface above and the studio sizes the code for you, then checks the printed module size against what a press can actually hold.
SurfaceDistanceMin size
Sticker on a bottle15 cm15 mm
Table tent50 cm45 mm
Shop-window poster2 m200 mm
Billboard20 m2 m
Questions people actually ask
Bitcoin, Litecoin, Bitcoin Cash, Dogecoin, and Dash, each with real address validation. Anything else works through the custom scheme field.
The URI convention wallets understand: scheme:address?amount=…&label=…&message=… Most chains adopted it, which is why one builder covers so many.
Because we won't pretend to know every chain's address rules. Custom mode checks the scheme and the basic address shape, then encodes exactly what you typed: test the code with your wallet before printing it.