Understanding QR Codes
A Quick Response (QR) code is a type of matrix barcode invented in 1994 by the Japanese automotive company Denso Wave. Unlike standard 1D barcodes, QR codes are 2-dimensional, meaning they can store data both horizontally and vertically. This allows them to hold significantly more information—up to 4,296 alphanumeric characters.
Error Correction Levels
QR codes have built-in redundancy called the Reed-Solomon error correction. This allows the code to be scanned even if part of it is damaged or covered (e.g., by a logo).
Level L (Low)
Recovers ~7% of data. Use this for the smallest, simplest codes with no logo.
Level H (High)
Recovers ~30% of data. Must be used if you place a logo in the center, as the logo effectively "damages" the data grid.
Best Practices for Printing
- Contrast: Always ensure there is high contrast between the foreground (code) and background. Dark on Light is the safest standard.
- Resolution: For print marketing (flyers, posters), ensure your QR code is at least 300 DPI. Our tool allows you to scale up to 2048px for crisp printing.
- Quiet Zone: Always leave a margin (white space) around the QR code so scanners can detect the edges.
Privacy Note
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