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Barcode Generator

Create standard Code 128, EAN-13, UPC-A, and Code 39 barcodes for products, inventory, and retail labels. 100% free and private.

Quick Answer & Summary

A Universal 1D Barcode Generator is an industrial barcode rendering utility that converts alphanumeric strings into standard 1D linear barcodes in accordance with GS1 and ISO/IEC specifications. It supports major worldwide symbologies, including Code 128 (high-density alphanumeric), EAN-13 and EAN-8 (global retail products), UPC-A and UPC-E (North American retail), Code 39 (logistics and automotive), ITF-14, and Codabar. The tool automatically calculates Modulo-10 and Modulo-103 check digits, allows adjustment of bar width reduction (BWR) and quiet zones, and displays human-readable text interpretation lines. E-commerce merchants, warehouse managers, inventory controllers, and logistics operators use this tool to generate product SKU labels, package routing barcodes, and library tracking tags. Exporting in scalable vector SVG and high-resolution print-ready PNG formats directly in-browser, all barcode rendering runs locally with zero tracking, watermarks, or subscription limits.

100% Client-Side

Supports all ASCII 32-126 alphanumeric characters and symbols.

Label & Dimensions
Bar Height80px
Bar Scale2x
PROD-98421-X
Format: CODE128•366 × 134 px

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Toolbox Editorial TeamVerified Authors

Systems & Security Engineers • Applied Cryptography & High-Performance Web Tools

Updated:
100% In-BrowserZero server storage
Standards AuditedRFC & ISO compliant
Peer ReviewedEditorial Policy
Documentation & Guide

How to Use Barcode Generator

1

Select Barcode Format

Choose Code 128 (general alphanumeric), EAN-13 (global retail), UPC-A (US/Canada retail), or Code 39 (industrial).

2

Enter Data / SKU

Type your product number, SKU, or alphanumeric code. Check digits are automatically computed for EAN-13 and UPC-A.

3

Customize & Export

Add a custom product label or price tag, adjust dimensions, and download as vector SVG, high-res PNG, or print label sheets.

Pro Tips
Enter 12 digits for EAN-13; the 13th check digit will be calculated automatically.
Use the 'Print Labels' button to print a sheet of 9 identical stickers on standard sticker paper.
Vector SVG export ensures infinite sharpness when printed at any scale.

Practical Examples & Conversions

Input
Format: EAN-13 | Code: 400638133393
Output
Valid EAN-13: 4006381333931 (Auto-calculated check digit: 1)

Frequently Asked Questions (PAA)

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Authoritative Standards & Citations

Calculations and algorithms on this page are implemented and verified in strict accordance with the following official technical specifications:

IETF (Internet Engineering Task Force)

RFC 7519: JSON Web Token (JWT)

Standardized compact, URL-safe means of representing claims to be transferred between two parties.

W3C Recommendation

Web Cryptography API Specification

Standard JavaScript API for performing basic cryptographic operations in web applications.

IETF Standards Track

RFC 4122: A Universally Unique IDentifier (UUID) URN Namespace

Definition of uniform format and generation algorithms for UUIDs.