segno

What it is and what it does

Segno is a pure-Python QR code and Micro QR code generator that implements the ISO/IEC 18004:2015(E) standard. It encodes data into QR codes with no external compiled dependencies, relying only on importlib-metadata. The library supports both standard QR codes and the smaller Micro QR variant, automatically choosing the minimal version needed or allowing explicit control via factory functions like make_qr() and make_micro().

The package outputs to many formats—SVG, PNG, PDF, EPS, PAM, PBM, PPM, LaTeX (PGF/TikZ), XBM, and XPM—all without requiring external libraries. It includes high-level functions for encoding contact data (vCard, MeCard), EPC QR codes, and WiFi configurations, plus a command-line interface for quick generation. Structured Append mode allows splitting large messages across multiple QR codes, and Hanzi mode supports Chinese character encoding.

Use it for:

• Generate QR codes for URLs, contact information, or WiFi credentials in web applications or scripts
• Create Micro QR codes for space-constrained applications like product labels or small displays
• Export QR codes to multiple formats (PNG, SVG, PDF) for printing, web embedding, or document inclusion
• Encode structured data like vCard contact information or EPC payment codes into scannable QR codes
• Split large messages across multiple QR codes using Structured Append mode for resilience or distribution

Worth the install?

AI-flagged interpretation of the facts on this page — verify before relying

Generates QR codes and Micro QR codes conforming to ISO/IEC 18004:2015(E), with output to multiple formats including SVG, PNG, PDF, and EPS without external dependencies.

Yes. Segno is a stable, actively maintained library with no vulnerabilities, low install friction, and a permissive license. It is well-suited for any Python project needing QR code generation without external compiled dependencies. The broad format support and standards compliance make it a practical choice for production use.

Install

segno on PyPI

pip install segno

uv add segno

poetry add segno

Installing segno

Before you install

Low friction: pure Python with only importlib-metadata as a runtime dependency. Active maintenance with a recent commit on 2026-07-23 and no reported vulnerabilities.

License in practice

Permissive license (BSD) allows commercial and private use with minimal restrictions.

Quickstart

pip install segno

import segno
qrcode = segno.make('Yellow Submarine')
qrcode.save('yellow-submarine.png')

Verify before relying

• Whether the package's claimed 98% test coverage and ISO/IEC 18004:2015(E) conformance have been independently validated
• Performance comparison claims against other pure-Python QR encoders and whether they remain current

Package facts

Evidence: segno-1.6.6-py3-none-any.whl

Keywords: QR Code, Micro QR Code, ISO/IEC 18004, ISO/IEC 18004:2006(E), ISO/IEC 18004:2015(E), qrcode, QR, barcode, matrix, 2D

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