barcode

Barcode generation library for Dart that can generate generic drawing operations for any backend.

• If you are looking to print barcodes, use pub:pdf.
• If you want to display barcodes in a Flutter application, use pub:barcode_widget.
• To generate SVG barcodes see the example tab.
• To generate barcodes in images, use pub:barcode_image.
• Live example with Flutter Web: https://davbfr.github.io/dart_barcode/

They all use this library to generate the drawing operations.

Interactive demo: https://davbfr.github.io/dart_barcode/

---

This library is the base to create flutter widgets or pdf barcodes. It depends only on dart with no platform-dependent implementation.

Only two basic drawing primitives are required:

• Filled rectangle to draw the bars
• Text drawing to display the code in full-text

Generate barcodes

// Create a DataMatrix barcode
                final dm = Barcode.dataMatrix();
                
                // Generate a SVG with "Hello World!"
                final svg = bc.toSvg('Hello World!', width: 200, height: 200);
                
                // Save the image
                await File('barcode.svg').writeAsString(svg);
                

Create a WIFI configuration barcode:

// Create a DataMatrix barcode
                final dm = Barcode.dataMatrix();
                
                final me = MeCard.wifi(
                  ssid: 'Wifi Name',
                  password: 'password',
                );
                
                // Generate a SVG with a barcode that configures the wifi access
                final svg = bc.toSvg(me.toString(), width: 200, height: 200);
                
                // Save the image
                await File('wifi.svg').writeAsString(svg);
                

Supported barcodes

The following barcode images are SVG. The proper rendering, especially text, depends on the browser implementation and availability of the fonts.

1D Barcodes

Code 39

Code 93

Code 128 A

Code 128 B

Code 128 C

GS1-128

Interleaved 2 of 5 (ITF)

ITF-14

ITF-16

EAN 13

EAN 8

EAN 2

EAN 5

ISBN

UPC-A

UPC-E

Telepen

Codabar

Height Modulated Barcodes

RM4SCC

POSTNET

2D Barcodes

QR-Code

PDF417

Data Matrix

Aztec

Changelog

2.2.9

• Implement POSTNET Barcode
• Fixed wrong left text position for CODE 39 with spacers disabled [NicolaVerbeeck]

2.2.8

• Add option to turn off spacers for CODE 39 [NicolaVerbeeck]

2.2.7

• Add text formatting options to GS1-128 [NicolaVerbeeck]

2.2.6

• Fix invalid UPC-E in some cases [shinbin]

2.2.5

• Fix EAN2 incorrect encoding issue [shinbin]

2.2.4

• Fix invalid Aztec in some cases [Tobias Eklund]
• Fix Dart 3.0 issues

2.2.3

• Fix Code-128 starting with even number of digits

2.2.2

• Avoids mandatory utf8 conversions
• Update dependencies
• Add DataMatrixEncoder
• Add DataMatrix tests

2.2.1

• Update Dart version number

2.2.0

• Allow the latest version of package:qr.
• Update dependencies

2.1.0

• Add ITF-16 Barcode

2.0.0-nullsafety

• Opt-in dart null-safety

1.17.1

• Fix telepen barcode checksum [chrishsieh]

1.17.0

• Implement BarcodeEan.normalize to return the barcode with the correct checksum

1.16.1

• Fix GS1-128 barcode

1.16.0

• Add textPadding parameter
• Update dependencies

1.15.0

• Add more options to codabar to specify the start and stop chars
• Improve documentation

1.14.0

• Allow Uint8List data barcodes
• Improve ITF barcode
• Add more unit tests

1.13.0

• Add Interleaved 2 of 5 (ITF) Barcode

1.12.0

• Add support for FNCx to GS1-128 and Code-128

1.11.1

• Improve 2d barcode verifications

1.11.0

• Fix font height error if not specified
• Implement RM4SCC Barcode

1.10.0

• Improve UPC-E barcode

1.9.1

• Fix issue with web build

1.9.0

• Add Aztec
• Add MeCard generator
• Use BarcodeException for all errors

1.8.0

• Add Codabar
• Add PDF417
• Add Data Matrix

1.7.0

• Add QR-Code

1.6.0

• Add Telepen

1.5.0

• Reorganize the library
• Add EAN 2
• Add EAN 5
• Add GS1-128 support
• Add ITF-14

1.4.0

• Implement proper EAN-13 rendering
• Implement proper UPC-A rendering
• Implement proper UPC-E rendering
• Implement proper EAN-8 rendering
• Implement proper ISBN rendering

1.3.0

• Add text align property
• Add a SVG drawing function

1.2.0

• Add a method to check Barcode validity
• Add CODE 128 A
• Add CODE 128 C
• Add misc functions to Barcode

1.1.2

• Update README

1.1.1

• Fix URLs

1.1.0

• Add EAN13
• Add EAN8
• Add ISBN
• Add UPC-A
• Add UPC-E
• Fix Code 93

1.0.0

Breaking change: different API

• Supports text output
• Add CODE 93
• Add CODE 128 B
• Add documentation

0.1.0

• Initial release, only CODE 39 support for now