Everyday Tools

Create barcode

Generate CODE128·EAN-13·EAN-8·UPC-A barcodes and save as PNG·SVG. Check the check numbers and prepare the image for printing.

Input and settings

CODE128 is 1–80 characters of English·numbers·ASCII symbols. It does not issue or register product codes.

Print size

Width 1–4px, height 40–240px. Keep the margins on both sides and check scanning at the actual print size.

Result

Results appear after execution.

Share result

Share the tool link and result text together. No URL is included in the result. Check the below content and then share it.

Photo · input values are not saved or uploaded. Save results before refresh or page navigation.

Processing method and criteria

A tool that validates the input range of supported barcodes and check numbers, then generates a printed image with white margins.

Actual example

Enter a EAN-13 content of 400638133393. Add a check digit 1 to form 4006381333931. The full number with the last digit changed to 2 will be marked as an error and overwrite the previous result.

Frequently Asked Questions

What are the supported specifications and input lengths?

CODE128 is 1–80 characters of printable ASCII English·numbers·symbols. EAN-13 gets 12/13 digits, EAN-8 gets 7/8 digits, UPC-A gets 11/12 digits. Short lengths have check numbers, long lengths are verified. GS1-128·Hangeul·control characters are not supported.

How is the check number calculated?

The content of EAN·UPC is multiplied alternately by 3 and 1 from right to left, then the sum is rounded to the nearest multiple of 10. The CODE128 check characters are calculated separately by the library.

Can the created barcode be registered directly on the product?

This tool creates only the image with the entered number. It does not provide product identification, GS1 registration, or ownership verification. Print quality varies depending on actual print size, surface, and printer. Do not cut margins or distort proportions; scan the output for confirmation.

Calculation criteria and reference materials

Verification of calculation criteria: · Calculation·verification principles · Report errors

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