What is high error correction, and how do I select it?

The high error correction level, indicated by H, is the level that can recover the most data among the four error correction levels. It can recover up to 30% of the damaged data. QR codes with the highest risk of damage are created with the high correction level. When making a QR code in QR FAST, selecting any error correction level is unnecessary. By default, the generator applies the highest correction level.