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Every barcode, explained.Make one, scan one, decode one.

TryUPC 036000291452ISBN 9780306406157UPC-E 04252614GS1 (01)(17)(10)

Start guardDigit 0 · L (odd parity) set0Digit 3 · L (odd parity) set3Digit 6 · L (odd parity) set6Digit 0 · L (odd parity) set0Digit 0 · L (odd parity) set0Digit 0 · L (odd parity) set0Centre guardDigit 2 · R set2Digit 9 · R set9Digit 1 · R set1Digit 4 · R set4Digit 5 · R set5Digit 2 · R set · check digit2End guard
Generate20 formats, SVG or PNGQR codesLinks, Wi-Fi, contacts, and how they workScanCamera or image, any formatExplore34 symbologies explained

How a UPC works

UPC-A in depth →

Hover or tap any part: each digit is seven modules of bars and spaces, the guards frame the halves, and the last digit checks the rest.

Start guardDigit 0 · L (odd parity) set0Digit 3 · L (odd parity) set3Digit 6 · L (odd parity) set6Digit 0 · L (odd parity) set0Digit 0 · L (odd parity) set0Digit 0 · L (odd parity) set0Centre guardDigit 2 · R set2Digit 9 · R set9Digit 1 · R set1Digit 4 · R set4Digit 5 · R set5Digit 2 · R set · check digit2End guard

Select a digit.

Explore by family

All symbologies →

Retail (UPC/EAN/GS1)

UPC-A, UPC-E, EAN-13, EAN-8, ISBN (Bookland EAN)

10 symbologies →

Linear (1D)

Code 128, Code 39, Code 93, Interleaved 2 of 5, Standard 2 of 5 (Industrial)

10 symbologies →

Matrix (2D)

QR Code, Micro QR Code, Data Matrix, Aztec Code, MaxiCode

7 symbologies →

Stacked

PDF417, Code 16K, Code 49

3 symbologies →

Postal

POSTNET, PLANET, Intelligent Mail barcode, RM4SCC and KIX

4 symbologies →