Free Online Barcode Generator

Generate barcodes in 6 formats: Code 128, EAN-13, UPC-A, Code 39, ITF, and Codab...

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Barcode Format

Input Value

Full ASCII, most versatile

Customization

1px2px3px4px
50px125px200px

Preview

Code 128 Reference

Character set: Full ASCII (32-127)

Checksum: Weighted modulo 103

Best for: Shipping labels, inventory, general-purpose

Density: High (compact barcodes)

SSL Secured
256-bit Encryption
Cloud Processing
Mobile Friendly

Barcode Generator Features

6 Formats - Code 128, EAN-13, UPC-A, Code 39, ITF, Codabar
Auto Check Digit - Automatic checksum calculation for EAN and UPC
Custom Colors - Full color customization for bars and background
Adjustable Size - Control bar width, height, and margin size
Bulk Mode - Generate multiple barcodes at once, download as ZIP
PNG & SVG - Export in PNG for screens or SVG for print

Why Use Free Online Barcode Generator?

6 Barcode Formats

Generate Code 128, EAN-13, UPC-A, Code 39, ITF, and Codabar barcodes. Choose the right format for retail, inventory, shipping, or library use.

Instant Preview

See your barcode update in real time as you type. Instant validation catches errors before you download.

Download PNG & SVG

Export barcodes as high-quality PNG for digital use or scalable SVG for print. Perfect at any size.

Bulk Generation

Enter multiple values and generate all barcodes at once. Download individually or as a ZIP archive.

Custom Colors & Size

Customize foreground color, background color, bar width, height, margins, and font size to match your brand.

No Watermarks

Every barcode is clean and production-ready. No watermarks, no branding, no limits on how many you create.

Who Uses the Barcode Generator?

Small Business Owners

Create product barcodes for retail packaging, price tags, and point-of-sale systems without expensive software.

Inventory Managers

Generate barcodes for warehouse shelving, asset tracking, and stock management with Code 128 or ITF formats.

Product Labeling

Create EAN-13 and UPC-A barcodes for retail products that meet international standards and scan at any checkout.

Library Systems

Generate Codabar or Code 39 barcodes for book labeling, membership cards, and media tracking.

How It Works

1

Choose a Format

Select your barcode format: Code 128 for general use, EAN-13 for retail products, UPC-A for US products, Code 39 for alphanumeric data, ITF for shipping, or Codabar for libraries.

2

Enter Your Data

Type or paste the value to encode. The tool validates your input in real time and auto-calculates check digits for EAN-13 and UPC-A barcodes.

3

Customize & Download

Adjust bar width, height, colors, and margins. Download as PNG or SVG, copy to clipboard, or use bulk mode to generate many barcodes at once.

Tips for Better Barcodes

Use SVG for Print

Always download SVG format when printing barcodes. SVG scales to any size without losing sharpness, unlike PNG.

Keep High Contrast

Use dark bars on a light background for reliable scanning. Black on white is the safest choice for maximum compatibility.

Quiet Zones Matter

Leave adequate white space (quiet zone) around your barcode. Most scanners need at least 10x the narrowest bar width on each side.

Frequently Asked Questions

Code 128 is the most versatile and supports full ASCII — use it for general purposes, shipping labels, and internal tracking. EAN-13 is the international retail standard (13 digits). UPC-A is used for US and Canadian retail products (12 digits). Code 39 is popular in non-retail industries like healthcare and defense. ITF (Interleaved 2 of 5) is common on shipping cartons. Codabar is used in libraries, blood banks, and FedEx airbills.
Select the EAN-13 format, then enter 12 or 13 digits. If you enter 12 digits, the check digit is calculated automatically. If you enter 13 digits, the tool validates that your check digit is correct. The barcode includes left guard, center guard, and right guard patterns as required by the standard.
Yes. Switch to Bulk Mode, enter one value per line in the text area, and click Generate All. Each barcode is rendered individually and can be downloaded separately or all at once as a ZIP file.
Code 128 encodes the full ASCII character set (128 characters) and produces compact barcodes. It uses a modulo-103 checksum. Code 39 only encodes uppercase letters, digits, and a few special characters (-, ., $, /, +, %, space). Code 39 barcodes are wider but do not require a checksum, making them simpler to implement.
Yes. All barcodes are generated following the exact encoding specifications for each format, including proper guard patterns, checksums, and quiet zones. They scan correctly with standard barcode readers. Make sure to maintain adequate contrast between foreground and background colors.
A check digit is an extra digit appended to a barcode value for error detection. For EAN-13 and UPC-A, it uses a weighted sum algorithm: odd-position digits are multiplied by 1 and even-position digits by 3, summed, and the check digit is (10 - sum mod 10) mod 10. This tool calculates it automatically.
Yes. You can adjust bar width (1-4 pixels), height (50-200 pixels), foreground and background colors, margin size, whether text appears below the barcode, and the font size of the text. All changes preview instantly.
Yes, completely free with no limits, no signup, and no watermarks. All barcode generation happens in your browser — your data never leaves your device. Generate as many barcodes as you need.

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