ShadowToolkit

Barcode Generator (Code 128 / EAN / UPC)

Generate retail and inventory barcodes locally.

100% In-Browser
100% In-Browser PrivacyLocal

Your files and data are processed locally and never leave your device.

Barcode Standard / Symbology100% compliant GS1 & ISO standards

Code 128 (Universal / Shipping)

15 characters

Supports all 128 ASCII characters (Letters, numbers, symbols).

Dimensions & Geometry
Bar Width Scale2x
Barcode Height100px
Quiet Zone (Margin)10px
Live Scannable Barcode Preview
About Code 128 (Universal / Shipping)

Logistics & General standard. Rendered client-side using strict GS1 barcode specification tolerances to ensure 100% scan pass rate with hardware laser scanners and smartphone cameras.

What is Barcode Generator (Code 128 / EAN / UPC)?

Universal Barcode Generator creates standard 1D linear barcodes across all major international symbologies: Code 128, EAN-13, UPC-A, Code 39, and ITF. Customize bar width, height, human-readable text labels, and export crisp vector SVG or high-DPI PNG barcodes.

Zero-Server Client-Side Guarantee

Unlike legacy online utilities that upload sensitive media and documents to remote cloud storage, Shadow Toolkit executes this entire operation directly within your browser's local runtime. Your raw data never crosses the network.

Key Capabilities

  • Supports all major 1D barcode symbologies: Code 128, EAN-13, EAN-8, UPC-A, UPC-E, Code 39, and ITF-14
  • Automated checksum calculation and validation (e.g. Modulo 10 check digit for EAN/UPC)
  • Configurable bar height, bar width, quiet zones, and text display
  • High-resolution vector SVG and PNG downloads for packaging and label printing
  • 100% private in-browser generation with zero cloud storage

Common Use Cases

1Generating product retail barcodes for packaging, merchandise, and inventory labels
2Creating warehouse bin and shipping container tracking barcodes
3Printing event admission tickets, membership cards, and library passes
4Connecting offline physical marketing materials, product labels, and signs with instant digital experiences

How to use Barcode Generator (Code 128 / EAN / UPC)

01

Select Symbology

Choose Code 128, EAN-13, UPC-A, or Code 39.

02

Enter Barcode Value

Type your numeric or alphanumeric data.

03

Download Barcode

Save your barcode as crisp vector SVG or PNG.

04

Print or Embed Asset

Download the scannable barcode or QR code as crisp vector SVG or high-resolution PNG ready for physical printing or digital display.

Frequently Asked Questions

For retail consumer goods, use UPC-A (North America) or EAN-13 (International). For internal warehouse inventory, shipping, and alphanumeric data, Code 128 is the industry standard.

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