Free Online Barcode Generator
Generate professional barcodes instantly — Code 128, EAN-13, EAN-8, UPC-A, Code 39, ITF-14 and more. No sign-up, no watermarks, no server uploads. Download as PNG or generate bulk barcodes from CSV in seconds.
Bulk Generator
Bulk Barcode Generator
Paste one barcode value per line. Uses the format and dimensions selected above. Download all as a ZIP.
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Last updated: May 20 2026
Reviewed by the QuickTooly Team
Barcode Generator Guide
Why Use QuickTooly's Barcode Generator?
- Instant generation: Real-time barcode rendering with immediate preview — no waiting, no page reloads.
- Multiple formats: CODE128, EAN-13, EAN-8, UPC-A, Code 39, and ITF-14 all in one tool.
- Bulk CSV support: Paste hundreds of values at once and download all barcodes as a single ZIP file.
- No watermarks: Your barcodes are clean and print-ready — no branding, no hidden links, no fees.
- Private & secure: Everything runs in your browser. Your product codes never leave your device.
- Customizable: Adjust bar width, height, and colors to match your label requirements.
- 100% free: No sign-up, no subscription, no usage cap — generate as many barcodes as you need.
What is a Barcode?
A barcode is a machine-readable representation of data using parallel lines, spaces, or patterns of varying widths. When scanned by a barcode reader or smartphone camera, the encoded data — typically a product ID, serial number, URL, or inventory code — is instantly decoded. Barcodes are the backbone of global retail, logistics, healthcare, and manufacturing.
Linear (1D) barcodes like Code 128 and EAN-13 encode data in a single horizontal dimension. They are the standard for product labels, shipping containers, and point-of-sale systems worldwide. QuickTooly generates all major 1D barcode symbologies from a simple text input.
Supported Barcode Formats
| Format | Characters | Common Use |
|---|---|---|
| Code 128 | Any ASCII | Shipping, logistics, general purpose |
| EAN-13 | 12–13 digits | Retail products (Europe, international) |
| EAN-8 | 7–8 digits | Small retail packaging |
| UPC-A | 11–12 digits | US retail products (GS1) |
| Code 39 | A–Z, 0–9, symbols | Industrial, automotive, defense |
| ITF-14 | 13–14 digits | Cartons, shipping cases (GS1) |
Popular Barcode Use Cases
Barcodes are essential in retail for product pricing and inventory management, in logistics for parcel tracking and warehouse operations, in healthcare for patient wristbands and medication labeling, and in manufacturing for component tracking. QuickTooly's generator produces print-ready PNG barcodes suitable for label printers, product packaging, shipping labels, and digital documents.
How to Use This Barcode Generator
Creating a barcode with QuickTooly takes just a few seconds:
- Select your format from the dropdown — Code 128 works for most general purposes
- Enter your value — a product SKU, serial number, URL, or any supported data string
- Adjust size and colors if needed using the customization controls
- Click "Generate Barcode" to render a live preview
- Download as PNG for immediate use in labels, documents, or print files
- Use the Bulk Generator to create hundreds of barcodes at once and download them as a ZIP
Barcode Best Practices
For optimal scanning reliability: maintain high contrast between bars and background (black on white is ideal), include a quiet zone (white space margin) on both sides of the barcode, avoid resizing barcodes below their minimum recommended size, and test on multiple scanners before mass printing. QuickTooly's generator applies proper margins and sizing by default.
Frequently Asked Questions
Which barcode format should I use?
For most purposes, Code 128 is the safest choice — it encodes any ASCII character and is widely supported by all scanners. Use EAN-13 or UPC-A for retail products registered with GS1. Use ITF-14 for outer cartons and shipping cases. Use Code 39 for industrial or government applications that specify it.
Can I generate barcodes in bulk?
Yes. Use the Bulk Barcode Generator section on this page. Paste one value per line into the textarea, click "Generate All", and then download all valid barcodes as a ZIP archive of PNG files. There is no limit on the number of barcodes you can generate.
Are these barcodes free for commercial use?
Yes. All barcodes generated by QuickTooly are completely free for personal and commercial use. There are no watermarks, no licensing fees, and no attribution requirements. The only exception is that GS1-registered barcodes (EAN/UPC) require you to own the GS1 prefix — we generate the visual, but you are responsible for registering the number.
What image format are the downloaded barcodes?
Barcodes are downloaded as PNG files, which provide lossless quality ideal for both digital use and print. The resolution scales with the bar width and height settings you choose. For high-quality print, increase the bar width to 3 or 4.
Is my data sent to a server?
No. QuickTooly's barcode generator runs entirely in your browser using the open-source JsBarcode library. Your product codes, serial numbers, and other data are never transmitted to any server, stored, or logged.
Why does EAN-13 / UPC-A require a specific number of digits?
EAN and UPC symbologies have fixed-length specifications defined by GS1 international standards. The last digit is a check digit calculated from the preceding digits to detect scanning errors. JsBarcode automatically calculates and appends the check digit when you provide 12 digits for EAN-13 or 11 digits for UPC-A.