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Vizua

Barcode Generator — Free Online

Your files never leave your device

How to Generate a Barcode

Vizua is a free barcode generator that renders a barcode graphic in your browser. Enter compatible ASCII text, a product code, or digits, select a format, and download the PNG. The generator does not assign identifiers, register products, or certify that a code will be accepted by a particular retailer or scanner.

Choose Code128 for compatible general-purpose ASCII data, EAN-13 for a valid 12- or 13-digit retail value, or UPC-A for a valid 11- or 12-digit value. The browser-based renderer checks the requested format and renders two-pixel-wide modules, 100-pixel-high bars, human-readable text, and a 20-pixel outer margin.

Barcode Formats Explained

  • Code128 — Encodes compatible ASCII letters, numbers, and common symbols rather than digits alone. It can be used in internal shipping, inventory, and asset workflows that accept this symbology.
  • EAN-13 — Accepts 12 digits so the check digit can be calculated, or 13 digits with a valid check digit. A rendered pattern does not establish ownership of the number.
  • UPC-A — Accepts 11 digits so the check digit can be calculated, or 12 digits with a valid check digit. Acceptance and identifier requirements depend on the supply chain.

Printing Your Barcode

The download is a raster PNG, not a physical-size or print-compliance certificate. Scale it only in a way that preserves whole, sharp modules and the white quiet margins. Printer resolution, ink spread, substrate, contrast, physical dimensions, encoded value, and scanner capabilities all affect readability. Test the final printed label with the actual destination scanner before a production run.

Browser processing

The entered value is rendered in the browser and is not sent to Vizua's image-processing server. The page may still make network requests for required code, site features, analytics, advertising, and error monitoring as described in the privacy policy.

Frequently Asked Questions

What barcode formats are supported?

Vizua supports Code128 for printable ASCII data, EAN-13 for 12 or 13 digits, and UPC-A for 11 or 12 digits. Code128 accepts characters from ASCII 32 through 126, while EAN-13 and UPC-A require the stated digit counts and a valid supplied check digit when the full length is entered.

How do I generate a barcode for free?

Type your text or number, choose Code128, EAN-13, or UPC-A, and click Generate. Vizua renders a PNG in the browser with two-pixel modules, a 100-pixel bar height, human-readable text, and a 20-pixel margin. No account or payment is required.

Can I use these barcodes for commercial products?

The generator only renders the value you enter; it does not issue or validate ownership of a retail identifier, register a product, or certify acceptance by a retailer or trading partner. Obtain identifiers through the organization required by your supply chain and test the final label in that workflow.

What is the difference between Code128 and EAN-13?

Code128 encodes printable ASCII letters, numbers, spaces, and common symbols; this generator does not accept Unicode text for Code128. EAN-13 represents a 13-digit numeric value, while UPC-A represents 12 digits. For either retail format, Vizua can calculate the last check digit from a value that is one digit shorter.

Are the generated barcodes scannable?

Vizua uses a browser-based barcode renderer to create Code128, EAN-13, and UPC-A patterns, but no barcode is guaranteed to scan with every device or workflow. Do not resample the bars unevenly; preserve the quiet margins, print with adequate contrast, and verify the final label with the target scanner and system.

What you can do with Barcode Generator — Free Online

Generate Code 128, EAN-13, or UPC-A barcode graphics from valid input. Choose display settings, verify the encoded value, and download PNG.

Barcode Generator — Free Online is designed for quick, repeatable work in a modern browser. The controls on this page let you prepare the result without installing software or creating an account.

How to use Barcode Generator — Free Online

  1. Select or drop the file you want to process, or enter the information requested by the tool.
  2. Review the available settings before processing, especially format, dimensions, quality, color, or other details that affect the output.
  3. Inspect the result, download the new file, and keep the original unchanged in case you need another version.

Private by design

Your files never leave your device. All processing happens locally in your browser.

Tips for better results

  • Start with the cleanest source available; a small, blurry, or heavily compressed file contains less detail to preserve.
  • Check dimensions and format before downloading so the result matches the site, app, printer, or platform where you will use it.
  • For large files, close unnecessary tabs and test one representative file before processing a full batch.
  • Open the downloaded result once before sharing it or replacing an original.

Where Barcode Generator — Free Online fits in a workflow

Use Barcode Generator — Free Online for one-off adjustments or as a preparation step before publishing, sharing, archiving, or continuing the edit in another application. When batch processing is available, validate the settings on a small sample first and then apply them to the remaining files.