Barcode Generator - Create Custom Barcodes Online

Generate custom barcodes for products, inventory management, and retail use with our free online Barcode Generator. This tool creates high-quality Code 128 barcodes that are compatible with virtually every laser and image scanner, ready to print on labels, packaging, and asset tags in seconds. No registration, no watermarks.

Code 128 is a one-dimensional (linear) barcode: it encodes data as a sequence of vertical bars and spaces of varying widths that a scanner reads in a single pass. Unlike a QR code, which stores data in a 2D grid, a linear barcode holds a single short string. That makes it ideal for product IDs, SKUs, and serial numbers where you want a compact, universally-scannable identifier.

Live Example

Type any alphanumeric value and the generator renders it as a Code 128 barcode on the right. The bars represent your value encoded as a sequence of widths; the scanner decodes those widths back into the original text:

Input (value to encode)

PROD-000123456

Output (bars, simplified)

|||| ||| | |||| || ||||| ||| | ||  ||

How to Use Barcode Generator

Enter Data: Type or paste the text, numbers, or data you want to encode into the barcode.
Generate Barcode: The tool automatically creates a barcode image from your input data.
Preview and Download: Preview your barcode and download it in high-quality format for printing or digital use.

Key Features

✅ Support for Code 128 barcode format
✅ Real-time barcode preview as you type
✅ Instant download in high-quality image format
✅ Compatible with most barcode scanners
✅ Easy-to-use interface for quick barcode creation
✅ No registration or sign-up required

Common Use Cases

Product Labeling: Create barcodes for retail products, packaging, and inventory items.
Inventory Management: Track and manage stock with unique barcode identifiers.
Asset Tracking: Label equipment, tools, and company assets for easy identification.
Library Systems: Generate barcodes for books, media, and library resources.
Event Management: Create barcodes for tickets, passes, and attendee badges.

Benefits of Using Our Barcode Generator

✅ Completely free to use with no limitations
✅ Fast barcode generation in real-time
✅ High-quality output suitable for printing
✅ Works on all devices - desktop and mobile
✅ No data storage - your information stays private

About Barcodes — How They Work

A barcode is a machine-readable representation of data. The most common retail style is the one-dimensional (linear) barcode, which prints data as parallel vertical bars and spaces of different widths. A scanner shines a light or laser across the bars, measures the widths of the dark and light regions, and converts that pattern back into the original characters using a defined symbology.

This tool generates Code 128, one of the most powerful linear symbologies. Code 128 can encode all 128 ASCII characters (digits, letters, and symbols) and comes in three subsets: Code 128 A (uppercase letters and control characters), Code 128 B (upper- and lowercase letters), and Code 128 C (pairs of digits, which are the most compact). The generator auto-selects the best subset for your input and appends a check digit — a calculated character that lets a scanner detect a misread, so a damaged or smudged code is rejected rather than silently returning the wrong value.

Code 128 is the backbone of shipping labels (GS1-128), warehouse bins, and asset tags because it is compact and universally supported. It is different from retail point-of-sale codes like EAN-13 or UPC-A (which have a fixed 12–13 digit length) and from QR codes (which are two-dimensional and hold far more data). For anything longer than a short ID — a URL, contact, or Wi-Fi login — reach for a QR code instead. To turn a generated label graphic into a raster file, use SVG to PNG.

Common Errors and How to Fix Them

Barcode won't scan: The value may be too long, making the bars too dense. Keep encoded values short (ideally under 50 characters); use a QR code for longer data.
Wrong characters encoded: Code 128 supports ASCII, but some legacy scanners misread non-standard characters. Stick to digits and basic letters for maximum compatibility.
Quiet zone missing: Like QR codes, linear barcodes need blank margin space on each side. Don't crop or crowd the printed label.
Print too small or low contrast: Print at sufficient size with high black-on-white contrast; faint or coloured bars fail to scan.

Frequently Asked Questions

1What barcode formats are supported?

Our barcode generator supports Code 128 format, which is widely compatible with most barcode scanners and printing systems.

2Can I customize the barcode appearance?

Yes, you can customize barcode settings including size and color to match your specific requirements.

3How do I download the generated barcode?

After generating your barcode, simply click the download button to save it as an image file for printing or digital use.

4Is the barcode generator free to use?

Yes, the tool is completely free with no registration, no watermarks, and no usage limits. Create and download as many barcodes as you need.

5Are the barcodes compatible with all scanners?

Code 128 barcodes produced by this tool are scannable by virtually all modern laser and image-based barcode scanners used in retail and inventory systems.

6Is there a limit to the data I can encode?

Code 128 supports alphanumeric data, but for best scannability we recommend keeping the encoded value short. For longer data such as URLs, use a QR code generator instead.