Enter one item per line to generate multiple barcodes automatically
This barcode generator is simple to use and fully featured, supporting multiple mainstream barcode formats. Here is a detailed guide to help you quickly generate professional-grade barcodes:
Enter the data you want to encode (such as a product number, serial number, or order ID) in the "Barcode Content" input field, select an appropriate barcode format, and click the "Generate Barcode" button. The generated barcode will appear in the preview area below. The format information and parameters will be displayed beneath the barcode for easy verification.
Different scenarios require different barcode formats. CODE128 is the most versatile format, supporting the full ASCII character set (including uppercase and lowercase letters, numbers, and symbols), suitable for the vast majority of applications. EAN-13 and UPC-A are retail-specific formats that require pure numeric input (EAN-13 is 13 digits, UPC-A is 12 digits). CODE39 is suitable for industrial and logistics scenarios, supporting alphanumeric combinations. ITF-14 is used for logistics outer packaging and requires 14 pure digits.
You can customize the appearance parameters of the barcode: "Bar Width" controls the thickness of the barcode lines—a higher value means thicker bars. "Height" controls the overall height of the barcode; we recommend keeping it at least 50px to ensure scanning equipment can recognize it properly. "Foreground" and "Background" let you adjust the barcode colors, but we recommend maintaining high contrast (such as black bars on a white background) for optimal scanning performance.
After generating the barcode, click "Download PNG" to get a high-resolution bitmap (suitable for web display and general printing), or click "Download SVG" to get a vector graphic (suitable for professional printing and large-format output, as it scales without distortion). Both formats can be used directly for product packaging, label printing, logistics documents, and more.
Barcodes are widely used in modern commerce and logistics. Here are several typical application scenarios:
Retail Product Management: Generate EAN-13 or UPC-A barcodes for your own brand products for supermarket and convenience store checkout scanning. Small businesses on e-commerce platforms need to apply barcodes to products for warehouse management and quick order fulfillment. This tool helps you batch-generate product barcodes with serial numbers.
Logistics & Warehouse Tracking: Apply ITF-14 or CODE128 barcodes to packages and shipping boxes to enable digital scanning during receiving, shipping, and inventory counting. In batch generation mode, enter one waybill or box number per line to generate a complete set of logistics barcodes at once, significantly improving warehouse operational efficiency.
Asset Tag Management: Generate unique identifier barcodes for enterprise fixed assets (computers, printers, servers, etc.), and use barcode scanners to perform asset inventory and tracking. The CODE128 format supports alphanumeric combinations, making it ideal for generating composite numbers that include department codes and device categories.
Event Ticketing & Access Control: Generate barcodes with unique numbers for event tickets and exhibition passes; on-site barcode scanning enables rapid check-in and registration. The batch generation mode can generate hundreds or thousands of ticket barcodes at once, which can then be printed in bulk with a printer.
How Barcodes Work: Barcodes represent information through combinations of black and white bars of varying widths. Scanning equipment decodes the barcode by detecting differences in reflected light. The "quiet zone" (blank areas on both sides of the barcode) is extremely important and must be wide enough; otherwise, the scanner cannot identify the start and end positions.
Checksum Mechanism: The last digit of EAN-13, UPC-A, and similar retail barcodes is a check digit calculated from the preceding digits using a specific algorithm to detect errors during scanning or manual entry. When you enter 12 digits to generate an CODE12813 barcode, the tool automatically calculates and appends the check digit. If you manually enter the full 13 digits, the tool verifies that the check digit is correct.
Barcode vs RFID: Barcodes are extremely low-cost (a few cents each) and suitable for large-scale applications, but require line-of-sight scanning. RFID (radio-frequency identification) can be read without line-of-sight contact, but is more expensive (a few to tens of dollars per tag). In practice, low-cost products use barcodes, while high-value products or scenarios requiring bulk inventory use RFID. The two technologies complement each other.
Minimum Size Specifications: To ensure scanning success, product barcodes have minimum size requirements. The minimum width for an EAN-13 barcode is approximately 26mm (magnification factor 0.8), with a height of at least 10mm. Logistics barcodes are typically larger, with a recommended height of at least 20mm. Barcodes that are too small may fail to scan when print quality is not optimal.
A barcode is one-dimensional and can only store a small amount of numbers or letters, typically used for product barcodes and logistics tracking. A QR code is two-dimensional and can store much more information (such as URLs, contact details, WiFi passwords, etc.), and can be scanned from any angle. They complement each other and are suited for different scenarios.
Yes. The tool supports downloading high-resolution PNG or vector SVG formats. We recommend using the SVG format for printing because it remains sharp at any size without blurring or distortion. When printing, make sure the barcode is large enough for scanning equipment to recognize properly.
EAN-13 is the international standard product barcode containing 13 digits and is used globally. UPC-A is mainly used in the United States and Canada and contains 12 digits. Both have similar encoding structures; EAN-13 has one additional country/region prefix digit compared to UPC-A.
Standard Code128 does not support Chinese characters; it primarily supports the ASCII character set (numbers, letters, and symbols). If you need a barcode containing Chinese information, we recommend using a QR code, which fully supports all characters in UTF-8 encoding.
Common reasons include: barcode being too small resulting in insufficient resolution, low color contrast (such as light-colored bars on a white background), barcode being cropped or incomplete, or using the wrong barcode format (such as entering letters in an EAN format). We recommend keeping the barcode height adequate, using dark foreground colors against a light background, and ensuring the data matches the selected format rules.
No. This tool runs entirely in your browser. All barcode generation is processed locally on your device, and no data is uploaded to any server. You can use it with confidence, even for sensitive information.
Yes. In batch mode, enter one data item per line, and the tool will generate individual barcodes for each line. You can generate multiple barcodes at once and download or copy them individually. This is very useful for generating serial numbers, series IDs, or large quantities of product barcodes.
Code128 is the most versatile format, supporting letters and numbers, suitable for most scenarios. EAN-13 is for retail products (13 digits). UPC-A is for North American retail (12 digits). CODE39 is for industrial and logistics (supports alphanumeric). ITF is for logistics packaging (even-numbered digits only). Pharmacode is for pharmaceutical packaging.