Are barcodes uploaded to a server?

No. Mewix draws and reads barcodes in your browser. Nothing is uploaded.

QR code vs barcode — when to use which?

Use a 1D barcode for retail SKUs and scanners that expect EAN/UPC/Code128. Use a QR code for URLs, WiFi, contacts, and phone camera scanning.

Can I download as PNG, JPG, SVG, or PDF?

Yes. Generators export PNG and high-quality JPG for photos and forms, SVG for design tools, a tight PDF of the code alone, and a print PDF centered on A4 or Letter.

What size should I print a QR code?

For reliable phone scanning, print at least about 2×2 cm (¾ inch) for short URLs, and larger for dense payloads or long distances. Keep quiet-zone margins clear.

Are my QR codes uploaded to a server?

No. Generation and scanning run entirely in your browser on Mewix. Files and payloads never leave your device.

Do check digits get calculated?

JsBarcode validates and can compute check digits for EAN/UPC-style formats when you enter the base digits.

Barcode Generator

Generate Code 128, EAN-13, UPC-A, Code 39, ITF-14, and more. Export PNG, SVG, tight PDF, or an A4/Letter print sheet — private browser tool.

Barcode typeValueLetters, numbers, and most ASCII characters.

Bar colorBackgroundHeight (80)Bar width (2)

Show human-readable text

Print paper

How to generate a barcode

Pick a barcode type. Choose EAN-13, UPC-A, Code 128, Code 39, or another supported format.
Enter the value. Type digits or text that match the format rules shown on the page.
Download. Export PNG, SVG, tight PDF, or a centered print sheet PDF.

Popular barcode types

EAN-13 UPC-A Code 128 EAN-8 Code 39 ITF-14 Codabar

Frequently asked questions

Code 128, EAN-13, EAN-8, UPC-A, Code 39, ITF-14, and Codabar — each with PNG, SVG, and PDF export.