barcode

A universal bar/QR code generation library for Rust, supporting many symbologies.
Zero external dependencies, no_std compatible (requires alloc).

Features

• Zero external dependencies (default)
• no_std compatible (requires alloc)
• SVG output built-in (to_svg_string())
• Optional image output (PNG, GIF, WebP) via image feature
• Supports 15+ barcode symbologies: linear, 2D, and postal

Installation

Add barcode to your Cargo.toml.

Default (no_std, SVG only):

[dependencies]
barcode = "0.1"

With image output (PNG/GIF/WebP):

[dependencies]
barcode = { version = "0.1", features = ["image"] }

Supported symbologies

Usage

QR Code

use barcode::qrcode::{QrCode, QrCodeEcc, Version, EncodeTextOptions};

let mut outbuffer = vec![0u8; Version::MAX.buffer_len()];
let mut tempbuffer = vec![0u8; Version::MAX.buffer_len()];

let qr = QrCode::encode_text(
    "Hello, World!",
    &mut tempbuffer,
    &mut outbuffer,
    EncodeTextOptions {
        ecl: QrCodeEcc::Low,
        minversion: Version::MIN,
        maxversion: Version::MAX,
        mask: None,
        boostecl: true,
    },
).unwrap();

println!("Version: {}", qr.version().value());

EAN-13

use barcode::common::traits::BarcodeEncoder;
use barcode::ean_upc::ean13::Ean13;

// 13 digits (check digit validated) or 12 digits (check digit auto-computed)
let output = Ean13::encode("5901234123457").unwrap();
let svg = output.to_svg_string();
println!("{svg}");

UPC-A

use barcode::common::traits::BarcodeEncoder;
use barcode::ean_upc::upca::UpcA;

let output = UpcA::encode("012345678905").unwrap();
let svg = output.to_svg_string();
println!("{svg}");

Code 128

use barcode::common::traits::BarcodeEncoder;
use barcode::linear::code128::Code128;

let output = Code128::encode("Hello, World!").unwrap();
let svg = output.to_svg_string();
println!("{svg}");

Code 39

use barcode::common::traits::BarcodeEncoder;
use barcode::linear::code39::Code39;

let output = Code39::encode("HELLO WORLD").unwrap();
let svg = output.to_svg_string();
println!("{svg}");

ITF (Interleaved 2 of 5)

use barcode::common::traits::BarcodeEncoder;
use barcode::linear::itf::Itf;

let output = Itf::encode("12345678").unwrap();
let svg = output.to_svg_string();
println!("{svg}");

GS1-128

use barcode::common::traits::BarcodeEncoder;
use barcode::gs1::gs1_128::Gs1_128;

let output = Gs1_128::encode("(01)12345678901231(10)ABC123").unwrap();
let svg = output.to_svg_string();
println!("{svg}");

EAN-8

use barcode::common::traits::BarcodeEncoder;
use barcode::ean_upc::ean8::Ean8;

let output = Ean8::encode("96385074").unwrap();
let svg = output.to_svg_string();
println!("{svg}");

UPC-E

use barcode::common::traits::BarcodeEncoder;
use barcode::ean_upc::upce::UpcE;

let output = UpcE::encode("04252614").unwrap();
let svg = output.to_svg_string();
println!("{svg}");

GS1 DataBar Omnidirectional

use barcode::common::traits::BarcodeEncoder;
use barcode::gs1::databar::GS1DataBar;

let output = GS1DataBar::encode("0950110153001").unwrap();
let svg = output.to_svg_string();
println!("{svg}");

PDF417

use barcode::common::traits::BarcodeEncoder;
use barcode::twod::pdf417::Pdf417;

let output = Pdf417::encode("Hello, PDF417!").unwrap();
let svg = output.to_svg_string();
println!("{svg}");

Data Matrix

use barcode::common::traits::BarcodeEncoder;
use barcode::twod::datamatrix::DataMatrix;

let output = DataMatrix::encode("Hello DM").unwrap();
let svg = output.to_svg_string();
println!("{svg}");

Aztec Code

use barcode::common::traits::BarcodeEncoder;
use barcode::twod::aztec::Aztec;

let output = Aztec::encode("HELLO AZTEC").unwrap();
let svg = output.to_svg_string();
println!("{svg}");

USPS Intelligent Mail Barcode (IMb)

use barcode::common::traits::BarcodeEncoder;
use barcode::postal::imb::Imb;

let output = Imb::encode("01234567094987654321").unwrap();
let svg = output.to_svg_string();
println!("{svg}");

Royal Mail RM4SCC

use barcode::common::traits::BarcodeEncoder;
use barcode::postal::rm4scc::Rm4scc;

let output = Rm4scc::encode("EC1A1BB").unwrap();
let svg = output.to_svg_string();
println!("{svg}");

Image Output

Enable the image feature to generate raster images (PNG, GIF, WebP).

// Requires `image` feature enabled
use barcode::common::traits::BarcodeEncoder;
use barcode::ean_upc::ean13::Ean13;

let output = Ean13::encode("5901234123457").unwrap();
let img = output.to_image(2); // module_size = 2px
img.save("ean13.png").unwrap();

For QR Code:

use barcode::qrcode::{QrCode, QrCodeEcc, Version, EncodeTextOptions};

let mut outbuffer = vec![0u8; Version::MAX.buffer_len()];
let mut tempbuffer = vec![0u8; Version::MAX.buffer_len()];

let qr = QrCode::encode_text(
    "Hello, World!",
    &mut tempbuffer,
    &mut outbuffer,
    EncodeTextOptions {
        ecl: QrCodeEcc::Low,
        minversion: Version::MIN,
        maxversion: Version::MAX,
        mask: None,
        boostecl: true,
    },
).unwrap();

let img = qr.to_image(4); // module_size = 4px
img.save("qrcode.png").unwrap();

no_std Support

This library is no_std compatible by default and only requires the alloc crate.
Enable the std feature if you need standard library support.
Image output (to_image()) requires the image feature, which implies std.

Modules Overview

Contributing

Contributions are welcome! To get started:

1. Fork the repo
2. Create a feature branch
3. Run cargo test and cargo clippy
4. Submit a pull request

License

MIT — see LICENSE for details.