Free Barcode Generator Online

Retail and Book Barcodes

• UPC-A: 11 or 12 digits; the check digit is added.

  

• UPC-E: 7 or 8 digits starting with 0 or 1.

  

• EAN-13: 12 or 13 digits; the check digit is added.

  

• EAN-8: 7 or 8 digits.

  

• ISBN: an ISBN-13 or ISBN-10, with or without hyphens and with the check digit optional; the hyphenated ISBN is printed above the bars.

  

• ISSN: the ISSN followed by a 2-digit issue variant, such as 0311-175X 00.

  

• ISMN: an ISMN with its hyphens, in the 979-0 or the older M- form.

  

GS1 and Shipping Barcodes

• GS1-128: GS1 element strings with Application Identifiers, such as (01) for the GTIN and (10) for the batch.

  

• ITF-14: 13 or 14 digits for cartons; the check digit is added.

  

• GS1 Digital Link QR: a GS1 Digital Link web address with your GTIN.

  

• GS1 DataMatrix: GS1 element strings in a 2D code.

  

QR Codes and 2D Barcodes

• QR Code: any text or web address.

  

• Data Matrix: any text in a small square code.

  

• PDF417: long text in a stacked code.

  

• Aztec: any text, up to 3,067 capital letters and digits in the largest symbol this generator makes.

  

• Micro QR Code: short data, up to 35 digits, in a code as small as 11 × 11 modules.

  

• MaxiCode: the fixed-size code also known as UPS Code, 24 to 27 mm wide.

  

Barcodes for Internal Use

• Code 128: any ASCII text and Latin-1 letters, the usual choice for internal labels.

  

• Code 39: capital letters A to Z, digits and - . $ / + % and space.

  

• Code 39 Full ASCII: all ASCII characters, lowercase included.

  

• Code 93: the Code 39 characters in a shorter symbol, with two check characters.

  

• Code 93 Full ASCII: all ASCII characters.

  

• Interleaved 2 of 5: digits only, encoded in pairs.

  

DPI and X-Dimension

The X-dimension is the width of the narrowest bar in millimeters. The generator rounds it to a whole number of dots at the chosen DPI, so every bar prints evenly, and shows the pixels per module and the print size. GS1 sets 0.33 mm as the standard X-dimension for UPC and EAN on retail products.

Bar Width Reduction

Ink spreads on paper and makes bars wider than they were drawn. Bar width reduction makes each bar thinner by the amount you enter, in mils or millimeters, to make up for it. Ask your printer for the right value, or leave it at zero for laser and thermal printing.

Quiet Zone

The quiet zone is the blank margin a scanner needs on each side of the code. The generator sets the minimum for each type, such as 9 modules on each side of a UPC-A and 4 modules around a QR code. Make it larger if the code is printed near other text or lines.

Human-Readable Text

Linear barcodes can show their data as text under the bars, in OCR-B by default. You can turn the text off, and for most types change its size, alignment and font. UPC, EAN, ISBN, ISSN and ISMN keep the standard digit layout in OCR-B, with the outer digits beside the bars.

Text Above and Below the Barcode

Type a product name above the code and a price or size below it. The text is set in Helvetica or Courier at the size you choose, outside the quiet zone, and the generator warns when a line is wider than the code.

QR Code Logo, Shapes and Colors

For a QR code, choose or drop a PNG, JPEG, WebP or SVG logo of up to 2 MB, set its width from 10 to 30 percent, and pick the module and eye shapes, a gradient and an eye color. With a logo the error correction is set to H. A call-to-action frame adds a line such as Scan me under the code, and downloads unlock only after the decoder reads the design back to the exact data.

Rotation, Transparent Background and Border

Turn the barcode by 90, 180 or 270 degrees, or make the background transparent for SVG, PNG and WebP files; a JPEG keeps its background. A margin, a border and rounded corners in millimeters go around the quiet zone and count in the print size. Print a transparent barcode only on a white or very light surface, because scanners need the light quiet zone.

Read-Back With a Real Decoder

After each change the drawing is decoded, and the preview says Read back: the decoder reads this exact data when it matches. If the decoder reads nothing or different data, a warning explains it and the badge counts the warnings. All 23 types are covered.

Print Simulation

Ink spread and Weak printer blur the drawing by a fixed distance on paper, 0.09 mm or 0.13 mm with noise, and read the result again. It is an approximation, not a model of your printer, but it shows when the X-dimension is too small. Use a larger X-dimension or a bar width reduction when the simulated print does not read.

Data Inspector

The data inspector counts the characters and UTF-8 bytes and lists the character classes. It also shows the QR mode, the Code 128 code sets, the GS1 Application Identifiers with their titles, and the GS1 prefix office of a retail number with a link to the barcode lookup.

SVG for Print and Design

An SVG file is a vector drawing, so the bars stay sharp at any size. Its width and height are written in millimeters, so design and label programs place it at its true print size.

PDF and EPS for Print Shops

PDF and EPS files are vector drawings at the print size, with the page or bounding box cut to the code. Text is set in Helvetica, a standard font that needs no embedding, and a QR logo is embedded as an image. EPS uses PostScript Level 3 for print shops and older design programs.

PNG and JPEG With DPI Metadata

PNG and JPEG files are drawn with a whole number of pixels per bar and carry the DPI you chose, so they print at the intended size. PNG keeps the edges perfectly sharp; JPEG is for programs that accept nothing else.

WebP for Web Pages

WebP files are small and suit web pages and online shops. The WebP format has no standard field for DPI, so set the print size yourself if you print one.

Test Sheet, Size Set and Embed Code

More export options make a PDF test sheet with the code at 80, 100 and 150 percent and 100 mm and 4 in rulers, on Letter or A4. The size set saves one file per magnification, and for PNG, WebP and JPEG per DPI, in a ZIP. The embed code gives an image tag, a data URI or inline SVG for a web page.

Check Digits

Leave out the last digit of a UPC, EAN, ITF-14 or ISBN-13 and the generator adds the correct check digit and tells you which one it is. If you type a wrong check digit, the generator names the right one and the Fix it button corrects it.

EAN-2 and EAN-5 Add-Ons

The add-on field adds a small second barcode to the right of UPC-A, UPC-E, EAN-13, ISBN, ISSN and ISMN codes. Magazines use 2 digits for the issue number, and books use 5 digits for the price, where 52495 means US$24.95 and 90000 means no suggested price.

Getting a Real Product Number

The generator draws a barcode for the number you enter; it does not issue numbers. Product numbers for stores come from GS1, ISBNs from your national ISBN agency, which is Bowker in the United States, and ISSNs from the ISSN network.

Presets and Recent Barcodes

Save the current type, size and style as a named preset and apply it later in the same browser; the data and the logo are not saved. The last 10 downloads are listed under Recent barcodes and open again with their data. Both stay in your browser's local storage.

Copy and Share Settings

Copy image puts a PNG on the clipboard, and Copy SVG code copies the drawing as text. Copy settings link copies a link that opens the generator with the type, data, X-dimension and DPI. Reset settings returns every option to the defaults for the chosen type.

Link Tracking for QR Code Links

When a QR code holds a web address, Link tracking adds the utm_source, utm_medium, utm_campaign, utm_term and utm_content parameters you fill in, so analytics can tell where a scan came from. A longer link makes a denser code, and the read-back checks the full link.