Barcode Generator

A barcode generator turns a number or text into a machine-readable pattern of bars that any barcode scanner can read. Create UPC, EAN-13, Code 128 and 9 other formats — with check digits calculated for you, print-ready labels (a single barcode at true size, a full page of copies, or a batch sheet), and PNG or SVG download, all generated in your browser.

🕒 Updated September 26, 2026 🏷️ 12 barcode formats 🖨️ Print-ready labels 🆓 Free forever ⭐ Rate this tool 📖 Read the guide

1 Your data

Letters, numbers, spaces and symbols (standard ASCII). The most flexible format — ideal for inventory, shipping and asset labels.

Every line becomes its own barcode in the format selected above. Invalid lines are skipped and listed, so one typo never blocks the whole sheet.

Customize

#000000
#FFFFFF

2 Your barcode

Enter valid data on the left to see your barcode here.

 
 

    Generated entirely in your browser — nothing you enter is ever sent to a server.

    What makes a barcode actually scan

    A barcode is only useful if every scanner reads it the first time — and most failures come from details that look fine on screen: a wrong check digit on a retail code, bars printed in red (invisible to red-light laser scanners), inverted colors, or a quiet zone cropped off in a label layout. A misprinted check digit is especially costly, because it only shows up after thousands of labels are already on shelves.

    This generator validates as you type: EAN-13, EAN-8, UPC-A and ITF-14 check digits are calculated for you or verified against what you entered, and color choices that scanners struggle with are flagged before you download. Barcodes store data in one dimension, so they suit short identifiers like product numbers and SKUs — for a URL, Wi-Fi login or contact card, a QR Code Generator is the better fit, since a QR code holds far more data and any phone camera can read it.

    How to generate a barcode

    1. 1
      Pick a barcode format

      Choose Code 128 for general labels, EAN-13 or UPC-A for retail products, or one of the other formats from the dropdown.

    2. 2
      Enter your data

      Type the number or text to encode. For EAN and UPC codes, the check digit is added automatically — or validated if you enter it yourself.

    3. 3
      Customize the look

      Adjust bar width, height, margin, colors and the text below the bars. The tool warns you if a color choice could stop it from scanning.

    4. 4
      Download or print

      Download a PNG or a vector SVG, copy the image, or print — one barcode at its exact size, or a full page of copies. Switch to Batch for a sheet of different labels, then print it or save it as a PDF.

    Worked example: the EAN-13 check digit

    Enter the 12 digits 590123412345 as an EAN-13 and the tool adds the 13th digit automatically. Here's the GS1 mod-10 calculation it runs — digits in odd positions count once, digits in even positions count three times:

    Digits:   5  9  0  1  2  3  4  1  2  3  4  5
Weight:   1  3  1  3  1  3  1  3  1  3  1  3

Odd positions:   5 + 0 + 2 + 4 + 2 + 4       = 17
Even positions: (9 + 1 + 3 + 1 + 3 + 5) × 3  = 66
Total:           17 + 66                     = 83

Check digit:    (10 − (83 mod 10)) mod 10    = 7
Full EAN-13:    5901234123457

    If you type all 13 digits and the last one doesn't match — say 5901234123458 — the tool flags it and tells you the correct digit instead of generating a barcode that scans as the wrong product.

    Frequently asked questions

    For a retail product sold in stores, use EAN-13 (worldwide) or UPC-A (mainly the US and Canada). For internal inventory, asset tags, shipping and warehouse labels, use Code 128 — it holds letters, numbers and symbols compactly, and every modern scanner reads it. Code 39 suits older industrial and government systems, ITF-14 is for outer shipping cartons, and Codabar is still used by libraries and blood banks.
    The barcode itself will be encoded correctly, but the number inside it matters too. Retailers require EAN/UPC numbers (GTINs) issued under a company prefix licensed from GS1 — making up your own risks colliding with another company's product. Get your numbers from GS1, then generate the barcode images here. For internal use (stock, assets, events), any number or Code 128 text is fine.
    The last digit of an EAN-13, EAN-8, UPC-A or ITF-14 barcode is a check digit, calculated from the other digits with the GS1 mod-10 formula so a scanner can detect a misread. You don't need to calculate it: enter the digits without it and it's added automatically, or enter the full number and this tool tells you whether the check digit is correct before you print it.
    An EAN-13 is nominally 37.29 × 25.93 mm at 100% magnification, and GS1 allows roughly 80%–200% of that for retail. Keep the blank margin (quiet zone) on both sides — scanners need it to find where the barcode starts. The Print button prints at exactly the size shown next to it (for example 105 × 34 mm) rather than scaling to fit the page. For your own artwork, download the SVG: it is vector, so it stays perfectly sharp at any size, while a PNG should be downloaded at High or Print resolution and never stretched unevenly.
    The usual causes are low contrast, inverted colors (light bars on a dark background), red or orange bars — which most laser scanners can't see, because they use red light — a quiet zone that's been cropped off, or a barcode printed too small or blurry. This tool warns you about color problems as you pick them. Dark bars on a white background at a generous size are the safest choice.
    Yes, completely free with no signup and no watermark, including batch label sheets. Every barcode is generated entirely in your browser — nothing you enter is sent to a server or stored.

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    Rahib Ali
    Written & maintained by Rahib Ali
    Senior PHP/Laravel Developer & Technical SEO Specialist, 12+ years experience · Updated September 26, 2026

    Encodes with JsBarcode, a widely used open-source barcode engine, validates GS1 check digits with the same mod-10 algorithm scanners use, and every format was verified by decoding the generated output with an independent scanner library (ZXing) — not just checked by eye.