Barcode Generator
Generate CODE 128, EAN-13, UPC-A, CODE 39 and ITF-14 barcodes free online and download as PNG — rendered in your browser, no sign-up.
About the Barcode Generator
Generate scannable barcodes in your browser and download them as crisp PNG images — completely free, with no watermark, sign-up or limit. Type your value, choose a symbology (CODE 128, EAN-13, UPC-A, CODE 39 or ITF-14), and the barcode renders instantly with live validation that tells you exactly what each format expects.
CODE 128 is the flexible default for internal labels, asset tags and logistics because it encodes letters, numbers and symbols. EAN-13 and UPC-A are the retail standards printed on product packaging in Europe/Asia and North America respectively, while ITF-14 marks shipping cartons and CODE 39 remains common in industrial and government labelling.
You control the look: bar thickness, height, background and bar colors, and whether the human-readable value prints under the bars. Because generation happens locally, product codes and internal SKUs never leave your device — handy for unreleased products and inventory data.
How to Use the Barcode Generator
- 1Type the value you want to encode.
- 2Pick the barcode type — CODE 128 for general text, EAN-13/UPC-A for retail products, CODE 39 or ITF-14 for industrial use.
- 3Adjust bar width, height and colors, and toggle the printed value.
- 4Download the finished barcode as a PNG image.
Frequently Asked Questions
What barcode formats does this generator support?
Five widely used symbologies: CODE 128 (any letters, numbers and most symbols — the go-to for internal use), EAN-13 (13-digit retail codes used across Europe and Asia), UPC-A (12-digit retail codes used in North America), CODE 39 (uppercase letters and digits, common in industry) and ITF-14 (14-digit carton codes for logistics).
Why does my EAN-13 barcode say the value is invalid?
EAN-13 requires exactly 12 digits — the 13th is a checksum the tool calculates automatically. If you enter 13 digits, the last one must match the correct checksum, otherwise scanners would reject it. Letters and spaces are not allowed. UPC-A works the same way with 11 digits plus a check digit, and ITF-14 with 13 plus one.
Can I sell products with a barcode I generated here?
The image itself is fully scannable, but retail EAN/UPC numbers must be officially assigned to your company by GS1, the global numbering body, so they are unique worldwide. Use this generator to render barcodes for numbers you already own, or for internal SKUs, asset tags and labels where global uniqueness is not required.
What size should a barcode be for reliable scanning?
Keep the bars tall enough and the contrast high: the default 90 px height with black bars on white scans reliably from screens and standard label printers. If scanners struggle, increase bar width to 3–4 px and avoid low-contrast color combinations — dark bars on a light background are essential, as scanners read the difference in reflected light.
Is my product data uploaded when I generate a barcode?
No. The barcode is drawn onto a canvas entirely inside your browser using the open-source JsBarcode library — nothing is sent to any server. That makes the tool safe for unreleased product codes, internal inventory numbers and any other commercially sensitive identifiers.