Barcode Generator for UPC, EAN-13 and Code-128
Create a barcode online for SKU, invoice and product labels. Download PNG. Works in the browser. No sign-up.
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What is Barcode Generator?
Barcode Generator builds standard linear 1D retail, shipping, and industrial barcodes across universal symbologies including Code 128, EAN-13, UPC-A, EAN-8, Code 39, and ITF-14. By entering numeric product codes or alphanumeric inventory tags, you can customize bar widths, display heights, human-readable text labels, and quiet zone margins in real time. The generator performs automatic checksum validations to ensure every exported SVG graphic scans accurately on commercial POS scanners and laser warehouse readers. Indispensable for retail merchants, warehouse managers, Amazon sellers, and manufacturers tagging retail goods and logistics cartons.
How to Use Barcode Generator in 4 Easy Steps
Step 1
Select your barcode standard format such as Code 128, EAN-13, UPC-A, EAN-8, or Code 39.
Step 2
Enter the numerical or alphanumeric data string according to the format requirements.
Step 3
Adjust bar width, height, and toggle human-readable text labels beneath the bars.
Step 4
Preview your rendered barcode and click Download Barcode to save as an SVG graphic.
Honest Technical Specifications & Limits
Universal Symbologies
Supports Code 128, EAN-13, EAN-8, UPC-A, Code 39, ITF-14, MSI, and Pharmacode.
Strict Checksum Validation
Validates required digit counts and standard checksums before rendering.
Scalable Vector Output
Generates crisp, infinitely scalable SVG graphics ready for packaging design.
Privacy First: 100% Client-Side In-Browser Processing
100% In-Browser Local Execution. Barcode Generator operates directly inside your browser memory using client-side JavaScript and WebAssembly. Your data is never transmitted over the internet or logged on remote servers. You can open Developer Tools (F12) Network tab to verify zero outbound network calls.
Verify it yourself: Open your browser's Developer Tools (F12 or Inspect), switch to the Network tab, and perform your action. You will observe zero outbound data uploads — your data never leaves your computer.
Popular Real-World Use Cases
Retail Product Labeling
Generate standard UPC-A and EAN-13 barcodes for consumer products and supermarket inventory systems.
Warehouse & Logistics Tracking
Create Code 128 and ITF-14 shipping barcodes for master cartons, pallets, and warehouse bin labels.
Asset & Equipment Tagging
Print Code 39 asset tags to track company hardware, laboratory equipment, and library materials.
Calculations, Formulas & Practical Examples
Barcode Generator Operational Logic
Calculates and transforms inputs in local browser memory with sub-millisecond latency.
Standard Workflow Scenario
Using Barcode Generator for instant data processing.