Barcode generator
Create printable Code 128, EAN-13, and UPC-style barcode images.
A practical guide to Barcode generator
Barcode Generator encodes a value into a selected one-dimensional barcode symbology. Format rules, check digits, quiet zones, bar width, and print quality determine whether scanners can read it.
Example: create a Code 128 inventory label
Enter the exact stock identifier, leave adequate white margin, export at print resolution, and scan the physical proof before production.
Task-specific steps
- 1
Choose a symbology accepted by the destination system and validate that the value meets its character rules.
- 2
Generate the barcode with sufficient bar width, height, contrast, and quiet space for its final printed size.
- 3
Export and test the actual screen or printed result with the scanners and software that will consume it.
Options that affect the result
- Symbologies differ in allowed characters, density, check digits, and industry use.
- Dimensions and display text affect label readability but must preserve the scanner-required quiet zone.
Limitations to know first
- A syntactically valid barcode does not register a product or create an official GS1 company prefix.
- Scaling, antialiasing, low contrast, glossy material, or poor printers can make correct barcode data unscannable.
Questions specific to this task
Should I use Code 128 or EAN?
Use the format required by the receiving system. Code 128 handles flexible internal identifiers; EAN or UPC use regulated retail numbering.
Why does the barcode scan on screen but not on paper?
Print scaling, ink spread, insufficient resolution, glare, or a clipped quiet zone can damage bar geometry.