Barcode Generator

About Barcode Generator

Barcode Generator on UtilityKit produces real, scannable production barcodes you can attach to actual products, inventory bins, library books, asset tags, shipping cartons, or service tickets. This is different from our Sample Barcode Generator (which makes test data for QA work) — here every barcode you generate is structurally valid in the symbology you pick, includes the correct check digit (auto-computed for EAN-13, UPC-A, EAN-8, ITF-14), and can be printed on labels or laser-etched onto a part without modification. Seven symbologies are supported: Code 128 for general-purpose alphanumeric labels, EAN-13 for retail products, UPC-A for North American grocery, Code 39 for industrial and military asset tags, ITF-14 for shipping cartons, EAN-8 for small packaging, and QR for 2D codes carrying URLs or larger payloads.

Why use Barcode Generator

• Real, production-ready output: check digits are auto-computed for EAN-13, UPC-A, EAN-8 and ITF-14 so the codes pass GS1 validation on first scan.
• Seven symbologies in one tool: switch between retail (EAN/UPC), industrial (Code 39), shipping (ITF-14), generic (Code 128) and 2D (QR) without learning a new app for each.
• Vector SVG export feeds directly into Avery, Dymo, Brother and Zebra label-design software at any DPI — no quality loss when rescaling.
• Runs entirely in your browser: SKUs, asset tags and serial numbers never touch a server, important for confidential product launches and pre-release inventory.
• Custom colours and dimensions let you match brand label stock without dropping into Illustrator — change foreground hex once and re-export.
• Clear per-format help text prevents the most common error: passing the wrong character count or character set for the chosen symbology.

How to use Barcode Generator

1. Choose a symbology from the Format dropdown — Code 128 is the safest default if you do not know which standard your scanner expects.
2. Type the value to encode in the Value field. The help line under the dropdown tells you exactly what is allowed (digits-only counts, character set, etc.) for the selected format.
3. Adjust Bar Width (1 to 6) and Height (20 to 240 px) to match your label stock and scanner-distance budget — 2 wide × 100 high is a good general default.
4. Pick foreground and background colours — black on white scans most reliably; coloured codes work but reduce scanner contrast headroom.
5. Toggle 'Show readable text under barcode' — keep it on for human-readable labels, turn it off for compact thermal-printer formats.
6. Click Generate, verify the rendered code on screen, then download as SVG (vector for label printers) or PNG (rasterised image).

When to use Barcode Generator

• Printing SKU labels for a small online store before shipping product to a fulfilment warehouse that requires barcode tags.
• Generating asset tags for laptops, monitors, and lab equipment in an internal IT inventory system using Code 39 or Code 128.
• Preparing ITF-14 carton labels for a shipment going into a major retailer's distribution centre.
• Building EAN-13 retail barcodes for new product SKUs after a manufacturer registers a GS1 prefix.
• Creating QR labels that link to product manuals, warranty pages, or instruction videos for printed packaging.
• Producing library, archive, or rental shop labels where Code 39 is the norm and the value contains a mix of letters and numbers.

Examples

Tips

• If you are unsure which symbology your retailer or scanner expects, ask first — the wrong format will simply not scan, even if the value is correct.
• Print a test label and scan it with at least two devices (a phone camera plus a 1D laser scanner) before committing to a print run of thousands.
• Keep at least a 2 mm quiet zone (white space) on the left and right of every linear barcode — cropping the quiet zone is the most common scan failure cause.
• For thermal label printers, export SVG and import into the printer's label software — the printer will convert to its native bitmap at the correct DPI for crisp bars.
• When generating QR codes that include a URL, use a URL shortener first — shorter URLs produce smaller, denser-error-corrected QR codes that scan reliably from a distance.

Frequently Asked Questions

Explore the category

Glossary

Symbology

The specific barcode standard or 'language' that defines how characters are encoded as bars and spaces. Code 128, EAN-13, and QR are different symbologies; a scanner must support a symbology to read it.

Check digit

The trailing digit on EAN, UPC and ITF codes that mathematically validates the rest of the value. If a scanner reads an inconsistent value, the check digit catches the error and the read is rejected.

GS1 prefix

A company-specific number range, licensed from GS1, that identifies the manufacturer in EAN-13 and UPC-A retail barcodes. Registered prefixes prevent SKU collisions across retailers.

Quiet zone

The blank margin on either side of a 1D barcode (and around all sides of a QR code). Most scanners require at least 10 module-widths of quiet zone to lock onto the code.

Module

The thinnest unit of width in a barcode. Bar widths and spacings are integer multiples of the module. The 'Bar width' setting controls module size in pixels.

GTIN

Global Trade Item Number — the umbrella term for retail product identifiers including EAN-13, UPC-A, EAN-8 and ITF-14. A GTIN uniquely identifies a product worldwide.