Barcode Generator

What is a Barcode Generator?

A barcode generator is a free online tool that creates scannable barcodes in multiple formats—CODE 128 (alphanumeric), EAN-13 (13 digits), UPC-A (12 digits), and CODE 39—for products, inventory, assets, and retail applications. Instead of expensive barcode software or subscriptions, our browser-based generator lets you input product codes or custom values, select barcode type, adjust width (1-5) and height (30-200px), toggle text display, and instantly generate professional barcodes ready for printing, labeling, or digital use.

Whether you're a small business owner creating product labels, warehouse manager tracking inventory, e-commerce seller listing products, or event organizer generating tickets, barcodes automate data entry, reduce human error, and streamline scanning workflows. Generate unlimited barcodes, download as high-resolution PNG images, print on labels, or integrate into product packaging—no coding or design skills required.

Features

1. 4 Barcode Types: CODE 128 (alphanumeric), EAN-13 (European retail), UPC-A (North American retail), CODE 39 (industrial/logistics).
2. Custom Barcode Values: Enter product codes, SKUs, serial numbers, ISBN, or any alphanumeric data up to format limits.
3. Adjustable Width: Scale bar thickness from 1 (narrow, compact) to 5 (wide, easy to scan) for different label sizes.
4. Adjustable Height: Set barcode height from 30px (small labels) to 200px (large posters) to fit your printing needs.
5. Text Display Toggle: Show or hide human-readable numbers below barcode for manual verification or clean aesthetic.
6. Instant Generation: Real-time preview of barcode on canvas as you change type, value, or dimensions—no waiting.
7. Download PNG: Export high-resolution PNG images perfect for printing on Avery labels, thermal printers, or inkjet/laser printers.
8. Scannable Output: Generated barcodes are verified scannable with standard barcode scanners, smartphones (camera apps), and POS systems.
9. No Watermarks: Downloaded barcodes are completely free with no branding, logos, or "Generated by" text overlays.
10. Browser-Based: No software installation, registration, or login required—works entirely in your web browser offline after first load.

How to Use the Barcode Generator

1. Select Barcode Type: Choose CODE 128 (most versatile), EAN-13 (retail products), UPC-A (North American retail), or CODE 39 (industrial).
2. Enter Barcode Value: Type product code, SKU, ISBN, or custom alphanumeric string. Follow format requirements (e.g., EAN-13 needs exactly 13 digits).
3. Adjust Width (1-5): Increase for large labels/posters (4-5), decrease for small price tags (1-2). Default 2 works for most uses.
4. Set Height (30-200px): Taller barcodes (150-200px) scan easier from distance, shorter (30-50px) fit compact labels. Default 100px is standard.
5. Toggle Text Display: Check "Show text below barcode" to display numbers for manual verification, uncheck for minimalist design.
6. Click Generate Barcode: Press button to render barcode on canvas. Preview appears instantly with your exact specifications.
7. Test Scanability: Use smartphone camera or barcode scanner app to verify barcode scans correctly before mass printing.
8. Download PNG: Click "Download PNG" button to save high-resolution barcode image to your computer.
9. Print Barcode: Open downloaded PNG in image viewer, adjust print size, and print on adhesive labels or directly on packaging.
10. Generate Multiple: Change barcode value and regenerate for different products—create unlimited barcodes for entire inventory.

Understanding Barcode Types

• CODE 128: Most versatile linear barcode. Encodes full ASCII (letters, numbers, symbols). Ideal for shipping labels, warehouse inventory, product tracking. Variable length—supports short codes (5 chars) to long serial numbers (100+ chars).
• EAN-13 (European Article Number): 13-digit barcode standard for retail products worldwide (except North America). Required for selling products in European stores, Amazon EU, and international marketplaces. First 2-3 digits = country code, next 4-5 = manufacturer, final 5 = product, last = checksum.
• UPC-A (Universal Product Code): 12-digit barcode standard for retail in USA, Canada, UK, Australia, New Zealand. Required for Walmart, Target, grocery stores, and Amazon US. First 6 digits = manufacturer (obtained from GS1), next 5 = product, last = checksum.
• CODE 39: Alphanumeric barcode (A-Z, 0-9, symbols -, ., $, /, +, %, space). Used in automotive, healthcare, government, defense, and logistics. Less dense than CODE 128—requires more space but easier to print on dot matrix/thermal printers.
• Choosing the Right Type: Retail products in stores → EAN-13/UPC-A. Internal inventory/shipping → CODE 128. Industrial/military/healthcare → CODE 39. E-commerce only → any type works (CODE 128 recommended for flexibility).

How to Get UPC/EAN Codes for Products

• Official GS1 Registration: Purchase UPC/EAN prefixes from GS1.org (official global authority). One-time fee + annual renewal. Expensive ($250-$10,000) but required for major retailers (Walmart, Target, grocery chains).
• Reseller UPC Codes: Buy single UPC codes from authorized resellers ($2-$50 per code). Cheaper but may not be accepted by all retailers—works for Amazon, eBay, Etsy, small shops.
• Amazon GTIN Exemption: Apply for exemption from UPC requirement on Amazon if selling private label/handmade products without retail distribution. Provides Amazon-internal identifiers instead.
• Internal SKU Barcodes: For warehouse/inventory use (not retail sale), generate custom CODE 128 barcodes with your own SKU numbers—no registration needed.
• ISBN for Books: Books use 13-digit ISBN (International Standard Book Number) which converts to EAN-13 barcode. Obtain from ISBN agencies (free in some countries, $125+ in USA).
• Verification: Before printing thousands of labels, verify UPC/EAN codes scan correctly and lookup in GS1 database if using official codes.

Why Use Barcodes for Products?

• Faster Checkout: Scanning barcodes takes 1-2 seconds vs. manually typing 12-digit UPC codes—reduces checkout time by 80% in retail.
• Eliminate Errors: Barcode scanning has 1 error per 3 million scans vs. 1 error per 300 manual entries—99.9999% accuracy.
• Inventory Tracking: Scan products in/out of warehouse to automatically update stock levels in real-time—prevents overselling and stockouts.
• Retail Requirements: Major retailers (Walmart, Target, Costco, grocery stores) require UPC/EAN barcodes to list products—mandatory for distribution.
• E-commerce Compliance: Amazon, eBay, Shopify, and marketplaces require GTINs (UPC/EAN) for most product categories to improve search and prevent duplicates.
• Price Management: Change prices in POS system database instead of reprinting price tags—barcode links to dynamic pricing.
• Sales Analytics: Track which products sell fastest, by location, time of day, or season—data-driven inventory decisions.
• Asset Tracking: Label equipment, tools, furniture with barcodes to track location, maintenance, and ownership across facilities.

Barcode Printing Best Practices

• High Contrast: Print black bars on white background for maximum scanability. Avoid colored barcodes (red, blue) unless using barcode-grade color printers.
• Adequate Size: Minimum width 1.5 inches for retail barcodes. Too small = won't scan. Standard UPC width: 1.5" x 1" height.
• Quality Printers: Use 300+ DPI laser or thermal printers for sharp edges. Inkjet printers can smudge—test before mass printing.
• Quiet Zone: Leave blank space (0.25") on left/right sides of barcode—no text or graphics invading barcode area.
• Label Material: Use glossy or semi-gloss labels for cleanest prints. Matte labels may scatter laser light and reduce scan success.
• Test Before Printing 1000s: Print 5-10 test labels, scan with multiple devices (smartphone, handheld scanner, POS) to verify readability.
• Avoid Stretching: Maintain aspect ratio when sizing images. Stretched barcodes won't scan—use width/height adjustments in generator instead.
• Lamination/Protection: For outdoor use or heavy handling, laminate barcode labels to prevent scratching, fading, or moisture damage.
• Placement: Position barcodes on flat surfaces, not curves or seams. Place on product back or bottom for retail, front for warehouse scanning.
• Backup Data: Keep database of barcode numbers and corresponding products/SKUs in spreadsheet—enables regeneration if labels are lost.

Perfect For

• Retail Store Owners: Generate UPC/EAN barcodes for products to enable POS scanning, price lookups, and inventory management.
• E-commerce Sellers: Create GTIN barcodes required by Amazon, eBay, Shopify, and marketplaces for product listings and fulfillment.
• Small Businesses: Print custom barcodes for internal inventory tracking, pricing, and stock management without expensive software.
• Warehouse Managers: Generate CODE 128 barcodes for SKUs, bins, pallets, and equipment to streamline receiving/shipping workflows.
• Event Organizers: Create barcoded tickets, wristbands, or badges for entry scanning and attendance tracking at conferences/concerts.
• Libraries & Schools: Label books, equipment, and assets with barcodes for checkout systems and inventory audits.
• Manufacturers: Add barcodes to packaging, cartons, and products for supply chain tracking from factory to retail.
• Healthcare Facilities: Generate CODE 39 barcodes for patient records, medication, samples, and medical equipment tracking.

Generate professional barcodes online for free with our barcode generator tool. Create CODE 128, EAN-13, UPC-A, and CODE 39 barcodes for products, inventory, retail, and e-commerce. Adjust width, height, and text display options. Download high-resolution PNG images ready for printing on labels, packaging, or documents. No software installation, no watermarks, unlimited barcodes. Perfect for small businesses, retailers, warehouses, and Amazon sellers. Start generating barcodes now.

Benefits

• Time Saving: Complete tasks quickly and efficiently
• User Friendly: Intuitive design for all skill levels
• Reliable: Consistent and accurate results
• Accessible: Available anytime, anywhere

FAQ