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.

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.

Code 39 Barcode Generator

Classic alphanumeric barcode for industrial and logistics use. Download PNG, SVG, or print-ready PDF — private, no upload.

Format: Code 39. A–Z, 0–9, and - . $ / + % space.

ValueA–Z, 0–9, and - . $ / + % space.

Bar colorBackgroundHeight (80)Bar width (2)

Show human-readable text

Print paper

How to generate a Code 39 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.

Need another format? Open the barcode generator hub or scan codes with the barcode scanner.

Frequently asked questions

Code 39 (Code 3 of 9) encodes uppercase letters, digits, and a few symbols. It is widely used in manufacturing and logistics.