Free · No installation · Local processing

WUCJ Barcode & QR Code Generator

Generate QR Code, Code 128 and Code 39 individually or in batches, download PNG files and print using A4 layouts. Your input is not uploaded to our server.

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Generator Settings

Barcode Type Input One item per line, up to 100 items per batch

Title / Product Name (optional) Items per row

Barcode Height Text Size

Show text below barcode

“Download All ZIP” includes a separate WUCJ Tools website return card and scannable QR code. Each barcode / QR PNG remains clean and unwatermarked.

EAN-13 / UPC-A note

The tool can calculate and validate the check digit, but it does not issue official retail product numbers.

Preview

Click an item to download it.

0 items

Enter content, then click Generate Preview.

How to Use

Choose QR Code, Code 128, Code 39, EAN-13 or UPC-A.
Enter one item per line; batch paste is supported.
Generate a preview, then download PNG files, a batch ZIP, or print on A4.

Code 128 vs Code 39

Code 128 has higher data density and works well for warehouses and product identification. Code 39 is simpler but supports fewer characters and usually produces longer barcodes.

What if scanning fails?

Keep enough quiet-zone margin, avoid printing too small or blurry, and make sure the content matches the selected barcode format. For Code 39, use uppercase letters, numbers and supported symbols.

Data Privacy

Barcodes are generated by JavaScript in your browser. WUCJ Tools does not receive the locations, product names or URLs you enter. Advertising and analytics services may use cookies; see the Privacy Policy.

EAN-13 / UPC-A

Use these formats when you already have the correct retail identifier. The tool can calculate the final check digit.

FAQ

Can I use generated barcodes commercially?

You may print generated codes for your own use, but official EAN/UPC product identifiers should be obtained from an authorized numbering organization rather than invented.

Why are ads unavailable offline?

AdSense requires an internet connection to load ads. This online version also loads barcode libraries over the network.

Does the website save my input?

This version stores settings only in your browser's localStorage and does not send them to our server. Clear the site's browser data to remove them.

Barcode format & printing guide

Before processing important files, review format choices, limitations and output checks.

Read the guide →