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Free Online Barcode Generator

Generate standard 1D barcodes including CODE128, EAN-13, UPC-A, and CODE39 with SVG and PNG downloads.

Companion Utilities:
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Free Online Barcode Generator

Supports CODE128, EAN-13, UPC-A & CODE39

Generate high-resolution printable retail, inventory, and logistics barcodes with instant SVG and PNG downloads.

Samples:
Bar Color:

Barcode Formats & Common Symbologies

Linear (1D) barcodes encode numbers, letters, and special symbols into parallel dark bars and white spaces of varying widths that can be decoded by optical laser scanners.

CODE 128

High-density universal format supporting all 128 ASCII characters (uppercase, lowercase, numbers, punctuation). Ideal for shipping labels and warehousing.

UPC-A & EAN-13

The international retail point-of-sale standards. UPC-A is used across the US and Canada (12 digits), while EAN-13 is used worldwide (13 digits).

CODE 39

Widely utilized in automotive, healthcare, and defense identification badges. Supports alphanumeric uppercase strings and hyphen dashes.

Frequently Asked Questions

Why does UPC-A or EAN-13 show an invalid barcode error?

UPC-A and EAN-13 strictly require numbers (no letters) of fixed length (12 digits for UPC, 13 digits for EAN). Furthermore, the final digit is a mathematical Modulo-10 checksum calculated from the preceding digits.

How to Use Free Online Barcode Generator

  1. Open Barcode Generator and provide your initial parameters or value.
  2. Select your desired conversion units, barcode symbology, or security options.
  3. Review the instantaneous, high-precision results or vector preview.
  4. Copy the output or download your generated asset immediately.

About this Tool

Barcode Generator is a high-speed, privacy-first web utility built for professionals, creators, developers, and students. By executing all logic locally within your browser, Vectoolz guarantees ultra-fast processing speeds, zero network bottlenecks, and ironclad confidentiality for your sensitive documents and data.

Frequently Asked Questions

Common questions about Free Online Barcode Generator, accuracy, and browser-side security.

Yes, Barcode Generator on Vectoolz is 100% free with no hidden charges, no subscription tiers, and no account registration required.
No. All computation and processing occurs 100% client-side inside your web browser using HTML5, WebAssembly, and local JavaScript. Your files never touch our servers.
Vectoolz is fully responsive and compatible with all modern browsers (Google Chrome, Mozilla Firefox, Apple Safari, Microsoft Edge, Opera, Brave) across Windows, macOS, Linux, iOS, and Android.