About the barcode generator
EAN-13 is common for retail product identifiers. This tool validates digits and computes the final checksum when you enter 12 digits.
Questions
Is anything uploaded?
No for this tool. The calculation or conversion runs in your browser.
Does it work on mobile?
Yes. The same workspace adapts to smaller screens and keeps the primary controls visible.
Is it free?
Yes. Simple Tools is designed as a free, fast utility suite.