Barcode Generator
Generate barcodes in Code 128, Code 39, EAN-13 and UPC-A formats. Download as PNG or SVG.
About the Barcode Generator
An online barcode generator creates scannable, high-resolution 1D linear barcodes in standard symbologies: Code 128, EAN-13, UPC-A, Code 39, and ITF. Barcodes are the backbone of retail sales, warehouse inventory management, asset tracking, library systems, and parcel shipping logistics.
Different barcode standards serve specific industries: Code 128 is a versatile high-density alphanumeric symbology used for shipping labels and packaging; UPC-A (12 digits) and EAN-13 (13 digits) are global retail standards for consumer products; and Code 39 is standard in industrial manufacturing and defence.
The generator outputs crisp vector SVG and high-DPI PNG graphics with customizable bar height, width ratios, human-readable text labels, and quiet zone margins, ensuring high read rates across laser scanners and smartphone cameras.
Encoding asset identification number "INV-98241" using Code 128 produces a crisp, scannable barcode label suitable for thermal barcode printers and warehouse scanners.
Tips for best results
- Maintain a clear white 'quiet zone' (blank margin) on the left and right sides of the barcode; encroaching graphics or borders prevent scanners from reading the code.
- Ensure retail EAN-13 and UPC-A codes include their valid check digit; the tool computes check digits automatically to guarantee compliance.
- Test print barcodes on your target label stock and verify them with a physical barcode scanner before commencing large print runs.
How to use the Barcode Generator
Why use Toolseza for Barcode Generator?
Use this tool as often as you need with no paywalls, premium tiers, or hidden daily calculation quotas.
All calculations and file manipulations run inside your web browser. Your inputs are never sent to a cloud server.
Results update in real-time as you type or adjust settings, with instant one-click copy and export capabilities.
Works natively on smartphones, tablets, laptops, and desktop computers with zero installation or account creation.
Editorial Standards & Verification: All formulas, algorithms, and conversion factors implemented on Toolseza adhere to openly documented international standards (ISO, NIST, BIPM, W3C). Results are verified against benchmark reference datasets before publication.
Frequently Asked Questions
Is Barcode Generator free to use?
Yes — Barcode Generator is completely free, unlimited, and requires no sign-up.
What barcode formats are supported?
Common formats include Code 128, Code 39, EAN-13, EAN-8, UPC-A and more. Code 128 is a good general-purpose choice for most inventory and shipping labels.
Can I customize the output before downloading?
Yes — you can adjust the details before downloading or copying the result.
Does it work on mobile and tablet?
Yes — Barcode Generator works on any modern browser, including mobile and tablet, no app required.