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QR Code Generator
Turn any text or URL into a scannable QR code.
Business
Barcode Generator
Turn text or numbers into a scannable barcode in seconds. Pick Code 128, Code 39, EAN-13, or UPC-A, tweak the size, and download a crisp PNG — all inside your browser.
Create a barcode
Show text under the bars
Code 39 check digit (mod 43)
Your barcode
How it works
Drawn on your device
Your text becomes symbols
Characters are mapped to the format's symbol table — Code 128 builds 11-module glyphs, Code 39 draws nine elements per character, and EAN-13/UPC-A encode six digits at a time.
Check digits protect the scan
Code 128 appends a mod-103 checksum, EAN-13 and UPC-A compute a mod-10 digit, and Code 39 can add a mod-43 character — so a smudged bar never reads as the wrong value.
Painted to a canvas
Bars are drawn as crisp rectangles with the quiet zone either side, so the PNG you download stays scannable at label and packaging sizes.
Questions
Barcode generator FAQ
Which barcode format should I pick?
Use Code 128 for general-purpose text and inventory labels — it is compact and supports the full printable ASCII set. Use Code 39 for simple alphanumeric IDs that older scanners read. Use EAN-13 or UPC-A for retail product packaging; those formats are numbers only and include a check digit automatically.
Is my data uploaded?
No. The bar pattern is calculated in JavaScript on your device and drawn straight to a canvas. Nothing you type is sent to a server, stored, or logged.
Why does my barcode need a check digit?
Check digits catch scans that misread one bar. EAN-13 and UPC-A always include one (added automatically), and the Code 39 option can add a mod-43 check character to verify longer IDs.