Generate Retail & Inventory Barcodes Instantly
Create compliant 1D barcodes for retail products, warehouse inventory, logistics, and book publishing. Instant generation in Code 128, EAN-13, and UPC formats with complete privacy.
How to Generate a Barcode
Create compliant 1D barcodes for retail products, warehouse inventory, logistics, and book publishing. Instant generation in Code 128, EAN-13, and UPC formats with complete privacy.
Select Barcode Standard
Choose your barcode format: Code 128 (general inventory), EAN-13 (international retail), or UPC-A (US retail).
Enter Barcode Value
Type the numeric digits or alphanumeric string required for your barcode product SKU.
Customize Visual Formatting
Adjust bar height, width scale, margin padding, and display of human-readable text labels.
Download Barcode Image
Export your barcode as a crisp vector SVG or high-resolution PNG image ready for product labels.
Why Generate Barcodes with Khalasna?
Industry-Standard Symbologies
Full support for Code 128, EAN-13, UPC-A, Code 39, ITF-14, and Pharmacode standards.
Automatic Check Digit Calculation
Calculates and validates modulo-10 and modulo-103 check digits automatically to ensure scanner compatibility.
Print-Ready Vector SVG
Download scalable vector SVG graphics that print with razor-sharp barcode line precision.
100% Client-Side Generation
Product SKUs, serial numbers, and private inventory data are processed locally without server logging.
Technical Architecture: Linear Barcode Symbologies & Modulo Checksum Verification
Linear (1D) barcodes represent alphanumeric data through varying patterns of parallel bars and spaces conforming to GS1 and ISO/IEC standards. In Code 128, characters are encoded using 11 modules per symbol with strict parity constraints, protected by a Modulo-103 checksum algorithm. In EAN-13 and UPC-A retail barcodes, symbols are divided into left and right halves using variable parity encoding to indicate the country prefix, followed by a Modulo-10 check digit: Checksum = (10 - [sum(odd_digits) + 3 * sum(even_digits)] % 10) % 10. Khalasna executes these encoding calculations client-side in JavaScript, generating precise black-and-white vector rect elements within an SVG container. Because vector geometries are mathematically calculated without pixel anti-aliasing, printed barcode lines maintain maximum contrast and zero bleed, ensuring 100% first-pass read rates on optical laser and camera barcode scanners.
Popular Applications for Barcode Generation
Retail Product Packaging
Generate official EAN-13 and UPC barcodes for product packaging, retail POS checkouts, and Amazon FBA labels.
Warehouse Inventory Management
Create Code 128 tracking stickers for warehouse bins, equipment serial numbers, and inventory pallets.
Event Ticketing & Membership Cards
Generate Code 39 or Code 128 badges for event check-ins, library cards, and visitor passes.
Frequently Asked Questions
Which barcode format should I use for retail products?
+
Which barcode format should I use for retail products?
+Use EAN-13 for products sold internationally and in the Middle East/Europe. Use UPC-A for products sold primarily in the United States and Canada.
Which format is best for internal asset tracking?
+
Which format is best for internal asset tracking?
+Code 128 is the most versatile format for internal inventory, supporting both letters and numbers in a compact width.
Are my serial numbers or inventory codes saved on your servers?
+
Are my serial numbers or inventory codes saved on your servers?
+No. The barcode generation runs 100% locally in your web browser. No product numbers or data are ever recorded.
Does the generator verify the check digit automatically?
+
Does the generator verify the check digit automatically?
+Yes, our engine automatically computes and validates the required check digit for EAN-13 and UPC-A codes.
Is this barcode generator free for commercial use?
+
Is this barcode generator free for commercial use?
+Yes, you can generate and download unlimited barcodes for commercial product packaging without fees.