Barcode Generator
Generate CODE128, CODE39, EAN-13 and UPC barcodes with validation.
Instructions: Barcode Generator
Follow these steps to get a reliable result without unnecessary setup.
- 1
Enter the value to encode and choose CODE128, CODE39, EAN-13 or UPC-A.
- 2
Choose the options in Barcode Generator that match your intended output, such as units, format, mode, range or quality when those controls are available.
- 3
Run Barcode Generator and review the displayed result, preview or validation message before proceeding.
- 4
Scanning support depends on the selected format, data rules, print quality and the scanner being used.
- 5
Use the available reset, copy or download action in Barcode Generator when you are satisfied with the result; only actions supported by this tool are shown.
About this tool: Barcode Generator
Enter a value, choose a supported barcode format and dimensions, preview the barcode, then download it as SVG or PNG directly from your browser.
The tool validates the supplied data before producing a scannable code so invalid values are not silently presented as valid output.
Barcode Generator is presented in the shared NexterHub tool layout so the working controls stay near the top while the method, example, limitations and related utilities remain available below the result.
How it works
JsBarcode calculates barcode modules and check digits where supported, then writes a real SVG. NexterHub rejects invalid complete EAN-13 or UPC-A check digits instead of silently displaying an invalid code.
Practical example
Enter 590123412345 as 12 EAN data digits to generate a scannable EAN-13 symbol with the calculated final check digit.
Important notes
Scanning support depends on the selected format, data rules, print quality and the scanner being used.
Privacy & processing
Code generation runs in the browser; only encode information you are comfortable placing inside the QR code or barcode.
Frequently asked questions
What does Barcode Generator do?
Generate CODE128, CODE39, EAN-13 and UPC barcodes with validation.
How do I use Barcode Generator?
Start with the main input step: Enter the value to encode and choose CODE128, CODE39, EAN-13 or UPC-A. Then choose any relevant options, run the tool and review the result.
How does Barcode Generator calculate or process the result?
JsBarcode calculates barcode modules and check digits where supported, then writes a real SVG. NexterHub rejects invalid complete EAN-13 or UPC-A check digits instead of silently displaying an invalid code.
What should I check before using a result from Barcode Generator?
Scanning support depends on the selected format, data rules, print quality and the scanner being used.
Does Barcode Generator send my input to a NexterHub server?
Code generation runs in the browser; only encode information you are comfortable placing inside the QR code or barcode.
Can I use Barcode Generator on a phone or tablet?
Yes. Barcode Generator uses the responsive NexterHub tool layout, so controls and results adapt to smaller touch screens.