Barcode Generator

QR & Barcode ToolsNew

Generate barcodes in multiple formats including EAN, UPC, and Code128.

Nothing Is UploadedRuns In This Browser TabNo Account Needed

How It Works

1

Upload / Input

Select your files or paste your content to get started.

2

Process

The work happens in this browser tab. Your file never leaves your device, so nothing is queued, stored or transmitted.

3

Download / Result

Get your results instantly. Download files or copy output in one click.

Features

Multiple barcode formats: Code128, EAN-13, UPC-A, Code39, ITF-14
Adjustable bar width and height
Optional human-readable text below bars
Real-time barcode preview
Download as PNG
100% client-side processing

How to use Barcode Generator

  1. Pick the barcode type

    EAN-13 and UPC-A for retail, Code 128 for internal labels, Code 39 for older systems. The type is dictated by where the code will be read.

  2. Enter the data

    Retail formats require a specific digit count and a valid check digit. Internal formats are more flexible.

  3. Generate

    The barcode is rendered ready for printing or embedding.

  4. Test with a real scanner

    Scan the printed label with the device that will actually be used, not just a phone app.

When to use Barcode Generator

  • Labelling stock in a small shop or storeroom
  • Tagging equipment for an asset register
  • Printing internal codes for a warehouse process
  • Producing retail barcodes for products you have registered numbers for

FAQ

Code128 is the most versatile and supports all ASCII characters. EAN-13 is standard for retail products in most countries. UPC-A is common in North America.
Yes. The generated barcodes are yours to use however you like. However, you need a valid GS1 prefix for retail EAN/UPC codes.
Yes. All generated barcodes conform to their respective format specifications and are scannable by standard barcode readers.
Code 128 for internal labels and asset tags — it is flexible and universally supported. EAN-13 or UPC-A only for retail products with numbers issued by GS1. ITF-14 for outer cartons.
Not legitimately. EAN and UPC numbers are issued by GS1, and an invented one may duplicate a real product's code. For internal tracking you can use any Code 128 value you like.
Usually print quality: too small, low resolution, smudged, or scaled non-uniformly so the bar widths are wrong. Unlike QR codes, 1D barcodes have no error correction, so there is no tolerance for damage.
A final digit calculated from the preceding ones so a scanner can detect a misread. Retail formats require a correct check digit; it is computed automatically when you generate the code.

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About Barcode Generator

Barcode symbologies are not interchangeable, and choosing the wrong one is the most common mistake. EAN-13 and UPC-A are retail formats with fixed lengths and a mandatory check digit, and they are only valid if the number was issued to you by GS1 — inventing one risks colliding with a real product.

For anything internal, Code 128 is almost always the right answer. It encodes letters and numbers, has no fixed length, and is read by essentially every scanner made in the last two decades. Code 39 is older and less dense but still appears in legacy systems, and ITF-14 is used on outer cartons.

Print quality matters more for barcodes than for QR codes, because a 1D barcode has no error correction. A smudged, stretched or low-resolution barcode simply does not read. Print at full size, do not scale non-uniformly, and keep the quiet zones at either end clear.

Tips and limits

  • Code 128 for internal use — variable length, alphanumeric, universally supported.
  • EAN-13 and UPC-A require a GS1-issued number. Do not invent retail barcodes.
  • 1D barcodes have no error correction. A damaged barcode simply fails.
  • Never stretch a barcode non-uniformly; the bar width ratios carry the data.
  • Leave the quiet zones clear at both ends, and test with the actual scanner.