What barcode types are supported?

The tool supports 15+ barcode formats: CODE128 (most versatile, supports all ASCII characters), EAN13/EAN8 (retail products in Europe), UPC (retail in North America), CODE39 (industrial applications), ITF/ITF14 (shipping containers), MSI (inventory control), and Pharmacode (pharmaceutical packaging). Each format has specific character restrictions and use cases - CODE128 is recommended for general purpose.

Can I generate multiple barcodes at once?

Yes! Use the batch build feature by entering multiple values separated by commas in the text area (e.g., "12345,67890,ABC123") and click "Batch Build". The tool generates all barcodes in a table below. You can then print them all at once using the "Print" button, or click individual barcodes to download them as separate PNG files. Perfect for creating product labels, inventory tags, or asset tracking systems.

What is the difference between CODE128 A/B/C?

CODE128 has three subsets: A (uppercase letters, control characters, digits), B (upper/lowercase letters, digits, punctuation), and C (optimized for pairs of digits, most compact for numeric data). "CODE128 auto" automatically selects the best subset based on your input. For mostly numeric data like product codes, use CODE128C for smallest barcode. For mixed alphanumeric text, use CODE128B. The auto mode handles this intelligently.

How do I ensure my barcode scans correctly?

Best practices: 1) Maintain high contrast (black bars on white background works best), 2) Ensure adequate quiet zones (margins) around the barcode - at least 10x the width of the narrowest bar, 3) Avoid printing on curved or reflective surfaces, 4) Test scan at actual print size before mass production, 5) Use appropriate barcode type for your data (EAN13 for retail requires exactly 13 digits), 6) Keep text visible below barcode for manual entry b…

Can I customize the barcode appearance?

Yes! Extensive customization options include: bar width (1-4 pixels), height (10-150px), margins (0-25px), foreground/background colors, show/hide human-readable text, text alignment (left/center/right), font family (8 options including Chinese fonts), font size (8-36pt), font styles (bold/italic), and text position margin. These options help match your brand guidelines or optimize for specific printing requirements.

Free Online Barcode Generator – EAN13, Code39, UPC

Enter product codes, URLs, or any text. Different barcode types have different character restrictions.

Width

Thickness of each bar (1-4)

Height

100

Margin

Background

Color

Text

Align

Font

Font Style

Font Size

Text Margin

Generate multiple barcodes at once. Separate each value with a comma.

Barcode	Barcode Image

What Is Barcode Generator?

A barcode generator is a simple online tool that converts numbers or text into machine-readable barcode images. Barcodes are used worldwide in retail, logistics, inventory management, and ticketing. With a free online barcode generator, you can create standard barcode types like EAN13, Code39, and UPC without installing any software or registering an account.

Simply enter your data, choose the barcode format that fits your needs, and the tool instantly generates a high-quality, downloadable barcode image. Whether you need to label products for a small shop, track assets in a warehouse, or create event tickets, a reliable barcode generator saves time and eliminates the complexity of encoding. The process is straightforward: input digits, select parameters, and get a ready-to-print barcode in seconds.

Key Features

Supports multiple formats – Generate EAN13, Code39, UPC-A, UPC-E, Code128, and more, covering retail, industrial, and government standards.
Instant generation – No delays. Enter your numbers and download the barcode image immediately.
Customizable sizes – Adjust the width, height, and resolution of your barcode to fit labels, tags, or packaging.
High-quality output – Download PNG or JPEG images at 300 DPI for crisp printing.
No signup required – Use the tool anonymously with zero account creation or data storage.
Completely free – No hidden fees, no trial limits. Generate and download unlimited barcodes.

How to Generate a Barcode

Go to the Barcode Generator page at ToolFK.
In the input field, type the numeric or alphanumeric data you want to encode. For EAN13 and UPC, enter the exact number of digits required.
Choose your barcode type from the dropdown menu – for example, Code39, Code128, or EAN13.
Optionally adjust the image size and color by using the available settings.
Click the “Generate” button – your barcode preview appears instantly.
Right-click on the barcode image (or use the download button) to save the file to your computer. It’s ready to print or embed.

Best Use Cases

Retail product labeling – Create EAN13 barcodes for grocery items, books, or clothing, complying with global retail standards.
Inventory tracking – Use Code39 or Code128 barcodes to label bins, shelves, or assets for quick scanning in warehouses.
Event ticketing – Generate unique barcodes for tickets, passes, or vouchers to streamline check-in at concerts or conferences.
Shipping and logistics – Print barcodes on package labels to speed up sorting and delivery tracking.
Small business operations – Create custom barcodes for handmade products or local inventory without paying for expensive software.

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Frequently Asked Questions

What barcode formats does this generator support?

The tool supports most common linear barcode formats including EAN13, UPC-A, UPC-E, Code39, Code128, Interleaved 2 of 5, Codabar, and more. If you need a specific standard not listed, contact us with your requirements.

How do I know which barcode type to use?

For retail products sold in stores, use EAN13 (international) or UPC (North America). For internal inventory or asset tracking, Code39 or Code128 are flexible and widely used. For library books, Codabar is common. Check the specifications of the system that will scan your barcode.

Is there a limit on how many barcodes I can generate?

No, you can generate and download as many barcodes as you wish. The service is completely free with no daily or monthly caps. There is also no need to create an account.

Can I customize the size or color of the barcode?

Yes. You can adjust the width, height, and even the background and bar colors using the available options. For best scanning results, we recommend keeping a high contrast (e.g., black bars on white background) and a minimum size suited for your printer.

Will my barcode scan properly at retail checkout?

If you use the correct format (e.g., EAN13 or UPC-A) and ensure the number of digits matches the standard, the generated barcode will be identical to commercially produced barcodes. Print them at a resolution of at least 300 DPI to guarantee clean scanning.

What kind of data can I encode?

You can encode numeric data for most barcode types (EAN, UPC, Code39 digits, etc.). For Code128 and Code39 you can also include uppercase letters and some symbols. The tool validates your input and will warn you if a format requires a specific length or character set.

Last updated: July 1, 2026