Barcode Generator

Continue in the tool

More pages for this tool

UPC-A SVG artwork

UPC-A SVG for print artwork

UPC-A is the 12-digit GS1 symbology used across North American retail, and under the hood it is really an EAN-13 with a fixed leading zero that never gets drawn. This generator renders the symbol as a vector SVG, so the artwork stays sharp at any print scale, from a small label to large packaging.

Why UPC-A runs on the same engine as EAN-13

The generator has no separate routine for UPC-A: it takes the 11 or 12 digits you provide, prefixes a leading zero, and fully reuses the EAN-13 bar logic, because every UPC-A number is, by GS1 definition, a GTIN-13 whose first digit is always zero. The check digit follows the same formula: weight 3 on the rightmost digit of the 11-digit body, weight 1 on the next, alternating back to the start. For 04210000526 the weighted sum reaches 46 (0x3 + 4x1 + 2x3 + 1x1 + 0x3 + 0x1 + 0x3 + 0x1 + 5x3 + 2x1 + 6x3), 46 modulo 10 gives 6, and the check digit works out to 4: the finished code reads 042100005264.
In the SVG's dimensions, scale accepts a range from 1 to 5 and bar height from 48 to 180 units, but the quiet zone, the bar-free margin at each end, stays locked at a fixed 12 units regardless of the chosen scale: shrinking the scale shrinks the bars, not the safety margin a scanner needs to locate where the pattern starts and ends. GS1's general specification also defines a recommended minimum magnification range for commercial print, something this generator does not check on its own, so reviewing the retailer's print requirements before finalizing the artwork is still necessary.
Because the bar drawing is literally an EAN-13 symbol with an invisible leading zero, any scanner capable of reading EAN-13 also reads UPC-A without any extra configuration, which is why registers built for the European standard work unmodified on products labeled only with UPC-A. In practice this means the same SVG this generator exports can circulate both on shelves that expect UPC-A and in inventory systems that only recognize EAN-13, without generating two separate files.

Three codes, one shared bar engine

11-digit body calculated by the generator

Input: 04210000526
Expected output: 042100005264

Weighted sum 46, modulo 10 equals 6, check digit 4.

A different 11-digit body

Input: 36000291452
Expected output: 360002914522

The same 3-and-1 weighted formula, applied to a different prefix.

Minimum scale for a small label

Input: escala 1, altura 48 unidades
Expected output: Barras compactas com zona de silêncio ainda fixa em 12 unidades por lado

The safety margin does not shrink along with the scale, because the scanner needs it regardless of the final printed size.

Full tool FAQ

What is the difference between Code 128, EAN and UPC?

Code 128 is a dense and flexible symbology for internal operations. EAN and UPC are numeric retail standards and depend on valid commercial identification.

Is the check digit generated automatically?

Is SVG better than PNG for barcodes?

What is a quiet zone?

Can I invent an EAN for a real product?

Why does my printed barcode not scan?

Does the tool validate commercial registration?

Are barcode values sent to the server?

Frequently asked questions

Why does UPC-A have 12 digits if I only enter 11?

Because the 12th is the check digit, calculated automatically from the 11 you enter using the same alternating 3-and-1 weight formula EAN-13 uses. Entering the 11 digits and letting the generator compute the last one avoids an incorrect checksum.

Why doesn't the quiet zone shrink when I reduce the scale?

Because it stays a fixed 12-unit margin in this generator, built to match the space a scanner always needs to locate the guard pattern at each end of the symbol, regardless of how compact the inner bars get at a smaller scale.

Can a scanner set up only for EAN-13 read a UPC-A generated here?

Yes, because the UPC-A bar pattern is identical to an EAN-13 symbol whose first digit, always zero, simply is not drawn. Any EAN-13-compatible scanner decodes UPC-A without any extra configuration.

Does the exported SVG guarantee the final print will be readable?

Not on its own. The file keeps its vector sharpness at any scale, but final readability also depends on the contrast between bar and background, the print material, and the minimum magnification GS1's specification recommends for that packaging type, none of which this generator checks automatically.

Next steps

Continue in the tool

Open full tool

UPC-A SVG artwork

UPC-A SVG for print artwork

Why UPC-A runs on the same engine as EAN-13

The generator has no separate routine for UPC-A: it takes the 11 or 12 digits you provide, prefixes a leading zero, and fully reuses the EAN-13 bar logic, because every UPC-A number is, by GS1 definition, a GTIN-13 whose first digit is always zero. The check digit follows the same formula: weight 3 on the rightmost digit of the 11-digit body, weight 1 on the next, alternating back to the start. For 04210000526 the weighted sum reaches 46 (0x3 + 4x1 + 2x3 + 1x1 + 0x3 + 0x1 + 0x3 + 0x1 + 5x3 + 2x1 + 6x3), 46 modulo 10 gives 6, and the check digit works out to 4: the finished code reads 042100005264.

In the SVG's dimensions, scale accepts a range from 1 to 5 and bar height from 48 to 180 units, but the quiet zone, the bar-free margin at each end, stays locked at a fixed 12 units regardless of the chosen scale: shrinking the scale shrinks the bars, not the safety margin a scanner needs to locate where the pattern starts and ends. GS1's general specification also defines a recommended minimum magnification range for commercial print, something this generator does not check on its own, so reviewing the retailer's print requirements before finalizing the artwork is still necessary.

Because the bar drawing is literally an EAN-13 symbol with an invisible leading zero, any scanner capable of reading EAN-13 also reads UPC-A without any extra configuration, which is why registers built for the European standard work unmodified on products labeled only with UPC-A. In practice this means the same SVG this generator exports can circulate both on shelves that expect UPC-A and in inventory systems that only recognize EAN-13, without generating two separate files.

Three codes, one shared bar engine

11-digit body calculated by the generator

Input: 04210000526
Expected output: 042100005264

Weighted sum 46, modulo 10 equals 6, check digit 4.

A different 11-digit body

Input: 36000291452
Expected output: 360002914522

The same 3-and-1 weighted formula, applied to a different prefix.

Minimum scale for a small label

Input: escala 1, altura 48 unidades
Expected output: Barras compactas com zona de silêncio ainda fixa em 12 unidades por lado

The safety margin does not shrink along with the scale, because the scanner needs it regardless of the final printed size.

Full tool FAQ

What is the difference between Code 128, EAN and UPC?

Code 128 is a dense and flexible symbology for internal operations. EAN and UPC are numeric retail standards and depend on valid commercial identification.

Is the check digit generated automatically?

Is SVG better than PNG for barcodes?

What is a quiet zone?

Can I invent an EAN for a real product?

Why does my printed barcode not scan?

Does the tool validate commercial registration?

Are barcode values sent to the server?

Frequently asked questions

Why does UPC-A have 12 digits if I only enter 11?

Why doesn't the quiet zone shrink when I reduce the scale?

Can a scanner set up only for EAN-13 read a UPC-A generated here?

Yes, because the UPC-A bar pattern is identical to an EAN-13 symbol whose first digit, always zero, simply is not drawn. Any EAN-13-compatible scanner decodes UPC-A without any extra configuration.