QR Code Symbol sizes

Each of these represents a different symbol size of the QR Code. The choice determines how much data can be encoded and how large the code will appear.

Smaller symbols (e.g. 21x21, 25x25) can hold less data but take up less space. Larger symbols can store more characters or additional GS1 elements.

If your data content always stays short, then using a smaller symbol is perfectly fine. If you later add more information, you'll need to select a larger version so the data still fits.

The choice partly depends on the amount of data and partly on the available space. ActiveBarcode automatically ensures that whichever size you pick still produces a valid, scannable QR Code.

If you choose a fixed type such as 65x65, that specific symbol size will be enforced, even if a smaller and more compact code would also work.

ActiveBarcode offers five automatic types: AUTO, ECC Level L, ECC Level M, ECC Level Q and ECC Level H. These always select the smallest possible symbol size that can accommodate all your data.
If you want to work with a fixed error correction, please select one of the following 4 types:

• QR Code ECC LEVEL L : 7% of the data can be restored.
• QR Code ECC LEVEL M : 15% of the data can be restored.
• QR Code ECC LEVEL Q : 25% of the data can be restored.
• QR Code ECC LEVEL H : 30% of the data can be restored.

These 4 types use fixed error correction and create the smallest possible code depending on the data to encode.



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