Logos, text, dot styles and colours. Everything stays on your device.
To save: long-press the code on a phone, or right-click → Save image on a computer. Exports at print size (1024 px code area).
Any size or shape works — wide, tall or round. The dots move out of the way to fit it. “Hug the logo outline” needs a PNG with a transparent background (or tick “Remove white background”). Error correction switches to H automatically.
Higher error correction lets the code survive a bigger logo, but adds more dots.