Barcode Generator for Web Free Online
Create professional barcodes for free with our online generator. Fast, easy, and supports multiple formats like EAN, UPC, QR, and Code 128. No registration required.
Start typing to generate a live preview
What Is This Tool
This is a professional-grade barcode generator built for retailers, warehouse managers, e-commerce sellers, and anyone who needs industry-standard barcodes without paying for proprietary software. It supports the most widely used symbologies — EAN-13, EAN-8, UPC-A, UPC-E, Code 128, and Code 39 — and generates output that is fully compatible with standard laser scanners and optical readers.
Every barcode is generated directly in your browser with real-time validation and live preview. No data leaves your device, no account is required, and there are no download limits. Customize bar dimensions, colors, and text display, then export a crisp SVG or PNG file ready for labels, packaging, and print runs of any scale.
How to Use
- Choose a format. Select the barcode type that matches your use case — EAN-13 or UPC-A for retail products, Code 128 for shipping and logistics, Code 39 for industrial or alphanumeric tracking.
- Enter your data. Type your barcode value in the input field. The tool validates your entry in real time and tells you immediately if the length or characters are incompatible with the selected format.
- Customize the output. Adjust bar width (1–5), height in pixels, and margin. Choose bar and background colors, and toggle the human-readable text on or off. All changes apply instantly — no need to click Generate again.
- Preview at print size. Select a print template — label sizes, A4, or US Letter — to see how your barcode will look relative to a real-world sheet before you export.
- Download your file. Export as SVG for professional printing where crisp edges are critical, or PNG for digital documents and online use.
Key Features
- Live preview. Every parameter change — data, size, color, or text setting — updates the barcode instantly without pressing a button.
- Six industry-standard formats. EAN-13, EAN-8, UPC-A, UPC-E, Code 128, and Code 39 cover the full range of retail, logistics, and industrial scanning requirements.
- Full size control. Set bar width, height, and margin precisely to match your label stock or packaging specifications.
- Color customization. Change bar color and background color independently to meet brand or design requirements.
- Text display control. Show or hide the human-readable digits below the bars, and set a custom font size from 8 px to 40 px.
- Print template preview. Visualize your barcode on common label and page sizes — including 1"×0.5" small tags, 4"×2" shipping labels, A4, and US Letter — before you print.
- SVG and PNG export. SVG output is vector-based and scales to any print resolution; PNG is ready for digital documents and web use.
- Fully private. All processing runs locally in your browser. No data is sent to any server.
Common Use Cases
- Retail product labeling. Generate GS1-compliant EAN-13 or UPC-A codes for shelf-ready packaging that scans at any point-of-sale terminal.
- Shipping and fulfillment. Create Code 128 barcodes for carton labels, packing slips, and carrier integration in warehouse and 3PL environments.
- E-commerce inventory. Build internal SKU barcodes to link physical products to your inventory management system or Shopify / WooCommerce catalog.
- Asset tracking. Tag IT equipment, tools, or physical assets with Code 39 labels for quick check-in and check-out workflows.
- Event and venue management. Print scannable ticket or badge barcodes for entry verification at conferences, trade shows, or private events.
- Small business self-publishing. Create professional product identifiers for handmade goods or local market items without licensing fees or minimum orders.
Frequently Asked Questions
Are these barcodes scannable by professional scanners?
Yes. All barcodes generated here strictly follow international industry standards and are compatible with standard laser and optical scanners used in retail, logistics, and industrial environments. Always do a test scan before committing to a large print run.
What is the difference between SVG and PNG downloads?
SVG is a vector format that scales to any size without losing quality, making it the preferred choice for professional printing where precise bar edges are critical for scanner reliability. PNG is a fixed-resolution raster image suited for digital documents, web pages, and quick proofing. If you plan to print, always use SVG.
How many digits does EAN-13 require?
EAN-13 requires exactly 12 or 13 numeric digits. If you enter 12 digits, the tool automatically calculates and appends the correct check digit. If you enter all 13, the final digit is validated against the standard checksum algorithm. The tool will alert you immediately if your input does not meet the requirement.
What characters can Code 128 and Code 39 encode?
Code 128 can encode the full ASCII character set (128 characters), including upper and lowercase letters, digits, and special symbols — making it ideal for alphanumeric serial numbers and shipping labels. Code 39 supports uppercase letters A–Z, digits 0–9, and a limited set of special characters (-, ., $, /, +, %, and space), which covers most industrial and inventory use cases.
Is my barcode data stored on your server?
No. All barcode generation happens entirely in your browser using JavaScript. No data is transmitted to or stored on any server. This tool works fully offline once the page has loaded.
Can I change the barcode color for branded labels?
Yes. Use the Bar Color and Background color pickers to customize the appearance. Keep in mind that scanner reliability depends on sufficient contrast between bar and background. Dark bars on a light background always scan most reliably; avoid low-contrast combinations like dark gray on dark blue for production use.
Advanced Tips
- Always export SVG for print. SVG preserves the exact bar-to-space ratio required for scanner reliability at any scale. Never stretch or distort a PNG barcode — if you need a different size, regenerate it with the correct dimensions.
- Use the print template preview before ordering labels. The template view gives you a proportional reference against standard label and page sizes so you can spot sizing issues before you print a full sheet.
- Keep Code 128 strings concise. Longer data strings produce wider barcodes. If your scanner has a fixed field of view, shorter data reduces the risk of misreads at the edges.
- Test before you commit. After generating your barcode, scan it with a smartphone barcode scanner app (like the native camera on iOS/Android) before sending the file to a printer or label vendor.
- Contrast is critical for color customization. The ISO 15416 print quality standard recommends a minimum contrast ratio of 70% between bars and background. Stick to near-black bars on white or very light backgrounds for production labels.
- Match bar width to your printer resolution. A bar width of 1 on a low-DPI printer may produce blurry edges. If you see scanning issues, increase bar width to 2 or 3 to create thicker, more readable bars at lower print resolutions.