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Introduction

A Barcode Generator is an online tool that creates high-quality 1D barcodes for products, inventory, shipping labels, asset tracking, retail, libraries, warehouses, and business operations. Instead of installing specialized software, you can generate professional barcode images directly in your browser within seconds. Simply enter the value you want to encode, choose the barcode format, and download the generated barcode for printing or digital use.

Whether you're creating product labels for a small business, organizing inventory, printing warehouse tags, or testing barcode scanners during software development, this Barcode Generator provides a fast and reliable solution. Everything runs locally in your browser, helping protect your data while delivering crisp, scannable barcode images suitable for both digital displays and printed labels.

How it works

Enter the text, number, or identifier you want to encode and select the appropriate barcode standard, such as Code 128, Code 39, EAN-13, UPC-A, ITF, or another supported format. The generator converts your input into a machine-readable barcode following the selected specification and renders it as a high-quality image that can be downloaded or printed.

All barcode generation is performed locally within your browser. No information is uploaded to external servers, allowing you to create inventory labels, product codes, serial numbers, and shipping identifiers securely. The generated barcode follows the chosen standard, making it compatible with most commercial barcode scanners and point-of-sale systems.

Common use cases

Businesses use barcodes to identify products, manage inventory, track assets, print shipping labels, organize warehouse shelves, and improve checkout efficiency. Developers frequently generate barcodes while building retail software, inventory management systems, logistics applications, and point-of-sale (POS) solutions. Schools, libraries, hospitals, and government organizations also rely on barcode labels to simplify identification and record management.

If you need to create scannable codes for websites, contact information, or Wi-Fi credentials, try the QR Code Generator. After creating barcode labels, you can optimize printed images using the Image Compressor or convert them into different image formats with the Image Converter.

Benefits

This Barcode Generator is free, fast, and works entirely in your browser without requiring registration or software installation. It supports multiple industry-standard barcode formats, generates high-quality printable images, protects your privacy by processing data locally, and works seamlessly across desktop computers, tablets, and smartphones.

Tips for best results

Select the barcode format that matches your intended use. Retail products typically require UPC or EAN barcodes, while Code 128 is commonly used for logistics, inventory management, and shipping applications. Using the correct barcode standard ensures maximum compatibility with barcode scanners and business systems.

Keep barcode text short and avoid unsupported characters for the selected barcode type. When printing, use high resolution and sufficient white space (quiet zones) around the barcode to ensure reliable scanning. Avoid stretching or compressing the barcode image, as changing its proportions can reduce scanning accuracy.

Before printing large quantities of labels, test the generated barcode with the scanner or mobile device that will be used in production. This helps verify readability, sizing, and compatibility while preventing costly printing mistakes.

Examples

Inventory label

Format: Code 128
Value: INV-2026-001245
Result → Printable warehouse barcode

Retail product

Format: EAN-13
Value: 8901234567897
Result → Standard retail barcode

FAQ

Why did EAN-13 fail?

EAN-13 needs 12 or 13 numeric digits. Invalid lengths or letters are rejected by the library.

Need a QR code instead?

Use the QR Code Generator.

What is a barcode generator, and why would I need one?

A barcode generator is a digital tool that creates scannable barcode images from your data. You need one to efficiently manage inventory, track assets, streamline point-of-sale processes, or enhance marketing efforts. It eliminates manual data entry errors, saves time, and provides accurate, machine-readable identification for products, documents, or locations. This ensures smooth operations across various industries.

What's the main difference between UPC-A and EAN-13 barcodes?

UPC-A is a 12-digit barcode predominantly used in the United States and Canada for retail product identification. EAN-13 is a 13-digit barcode, an international standard widely adopted globally, especially in Europe and other regions. While both are used for retail, an EAN-13 barcode with a leading "0" is visually identical to its UPC-A counterpart, meaning many modern scanners can read both interchangeably. Our generator handles the specific digit rules and check digit calculation for each.

How does the check digit work in UPC-A and EAN-13 barcodes?

The check digit is the final digit in UPC-A and EAN-13 barcodes, crucial for error detection during scanning. It's calculated using a specific algorithm (often a modulo 10 sum of the preceding digits, with alternating weights). When a barcode is scanned, the scanner performs the same calculation. If the calculated check digit matches the one printed on the barcode, it confirms a successful and accurate scan. If they don't match, an error is signaled, preventing incorrect data entry.

What are the common uses and advantages of Code 128 barcodes?

Code 128 is a highly versatile, high-density alphanumeric barcode capable of encoding all 128 ASCII characters, making it suitable for complex data. It's widely used in logistics, shipping, warehousing, and healthcare for applications like product identification, serial shipping container codes (SSCC), and inventory management. Its main advantages are its high data capacity in a small space and built-in error detection through a mandatory check digit, ensuring data integrity.

In what industries are Code 39 barcodes typically used?

Code 39 (also known as Code 3 of 9) is a general-purpose, variable-length alphanumeric barcode commonly used in industrial, automotive, and healthcare sectors. It supports uppercase letters, numbers, and some special characters. Its simplicity and robust nature make it ideal for internal tracking systems, asset management, inventory control (e.g., in automotive parts, blood banks), and non-retail applications where full ASCII support is not strictly required.

What are the benefits of downloading barcodes in SVG format?

SVG (Scalable Vector Graphics) is an XML-based vector image format. Downloading barcodes in SVG offers significant advantages: they are scalable without loss of quality, meaning they can be resized from a tiny label to a large poster without pixelation. This ensures crisp, clear lines for optimal scanning regardless of size. SVG files are also typically smaller than high-resolution raster images (PNG, JPG) and can be easily edited or integrated into web and print designs.

What are the maximum character limits for the different barcode types supported?

Our barcode generator supports varying character limits depending on the symbology. Code 128 can encode up to 80 characters (alphanumeric). UPC-A requires exactly 12 digits (including the check digit), and EAN-13 requires exactly 13 digits (including the check digit). Code 39 supports variable length up to 50 characters, including uppercase letters, numbers, and specific symbols. QR Codes offer the largest capacity, storing up to 2000 characters of text, URLs, or other data.

What's the difference between static and dynamic QR codes, and which does this tool generate?

Our tool generates static QR codes. Static QR codes directly embed the data (like a URL or text) into the code itself. Once generated, the content cannot be changed without creating a new QR code. Dynamic QR codes, on the other hand, store a short URL that redirects to the actual content. This allows the destination content to be updated anytime, even after the QR code has been printed. Dynamic QR codes often require a subscription service for management and tracking features.

What data types can a QR code store, and what are its common applications?

A QR code (Quick Response code) is a 2D barcode that can store a wide range of data, including plain text, website URLs, email addresses, phone numbers, SMS messages, vCards (contact information), Wi-Fi network credentials, and even location data. Common applications include marketing campaigns (linking to websites or promotions), product information, contactless payments, event ticketing, and sharing contact details or Wi-Fi access in a quick, scannable format.

How can I scan a barcode or QR code using my smartphone?

Most modern smartphones have built-in capabilities to scan barcodes and QR codes. For QR codes, simply open your phone's camera app and point it at the QR code. A notification or pop-up should appear, allowing you to access the encoded content (e.g., open a website). For traditional barcodes, you might need a dedicated barcode scanner app, although some camera apps or shopping apps also have this functionality. Many apps are available for free on both iOS and Android devices.