🍋 QR & Barcode
Barcode Format Reference
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About Barcode Format Reference
Browse barcode symbology specifications — compare 1D, 2D, postal, and retail barcode formats with encoding rules and use cases.
How It Works
Select a barcode category to browse detailed specifications for each format, including character sets, capacity limits, check digit algorithms, and common applications.
Frequently Asked Questions
What's the difference between 1D and 2D barcodes?
1D barcodes (UPC, EAN, Code 128) encode data in varying-width lines — compact but limited capacity. 2D barcodes (QR, Data Matrix, PDF417) use a grid of dots/squares for much higher capacity.
Which barcode format should I use?
For retail products: UPC-A (North America) or EAN-13 (international). For shipping: Code 128 or GS1-128. For mobile scanning: QR Code. For small items: Data Matrix.