STANDALONE CLI ENGINE & IN-BROWSER WORKSTATION

TEXT IN.
PIXEL-PERFECT QR OUT.

The uncompromising, zero-telemetry QR synthesis utility. No SaaS subscriptions, no expiring redirect servers, no analytics beacons, and zero vendor lock-in. Powered by Python qrcode and pure in-browser Reed-Solomon algebraic math.

Open In-Browser Studio

$ pip install qrcode[pil]

CLI Recipes

// TECHNICAL METRICS STATUS: READY

Latency

0.00 ms

Direct execution

Telemetry

0 Bytes

Air-gapped safety

Payload Term

Permanent

Zero redirect hops

Error Levels

L · M · Q · H

Reed-Solomon GF(256)

SPECIFICATION: ISO/IEC 18004

// 01 IN-BROWSER QR STUDIO WORKSTATION

Interactive Matrix Synthesizer

Deterministic real-time encoding. Output rendered in Canvas, ANSI ASCII terminal blocks, or vector SVG.

ENGINE: STANDALONE JS (ZERO SERVER CALLS)

[A] Payload Protocol Preset SELECT DATA SCHEMA

[B] Reed-Solomon Error Correction (Galois Field GF(256)) ~15% Recovery (Standard)

[C] Color Palette Schema CONTRAST COMPLIANT

Foreground (Modules)

Background (Quiet Zone)

Quiet Zone Border 4 modules

0 (Flush) 4 (ISO Standard) 8 (Wide)

Module Geometry Style

29 × 29 modules

TEST SCAN CAMERA

Camera Scannable · iOS, Android, Zebra Handheld Imagers

TTY: /dev/tty0 · RAW MATRIX

PAYLOAD: 34 chars

VERSION: Ver 3 (Auto)

ERROR CORRECTION: Level M (15%)

// 02 ENGINEERING SPECIFICATIONS

Built for Engineers Who Reject Cloud Entrapment

Commercial QR services exist to capture corporate emails, siphon customer scan locations, and charge $39/month. QrGenerator is built from the ground up as a pure offline utility.

[ SPEC_01 ] SECURITY ARCHITECTURE LOCAL COMPUTATION

100% Air-Gapped Sovereignty

Never pipe internal company endpoints, confidential Wi-Fi credentials, cryptographic seeds, or patient contact cards through third-party SaaS cloud endpoints. QrGenerator runs entirely on your local CPU with zero outbound network calls.

Works inside Faraday cages or isolated VLANs ZERO CLOUD CALLS

[ SPEC_02 ] ANTI-EXPIRATION DIRECT ENCODING

Permanent Physical Encoding

Commercial QR vendors secretly encode their own domain (qr-tracker.com/x8j9) to hijack scans and deactivate codes after a 14-day free trial. QrGenerator writes raw UTF-8 payloads directly into the physical matrix.

✓ Never expires, zero server hops, zero middleman RFC 18004

[ SPEC_03 ] FAULT-TOLERANCE MATHEMATICS GF(256) ALGEBRA

Reed-Solomon Damage Simulator

QR codes use Galois Field GF(256) polynomials to append redundant parity codewords. Adjust the slider to simulate physical surface damage on the matrix in real-time:

Simulate Surface Damage: 0% (Pristine)

Optical status: 100% Decodable (Parity intact)

[ SPEC_04 ] VECTOR

Sub-Millimeter SVG

Export pure mathematical XML vectors. Perfect for CNC laser engravers, silk-screen silks on PCBs, and 100-foot billboards without blur.

Infinite DPI · Scalable Paths

[ SPEC_05 ] BATCH

High-Speed Batch

Need 50,000 unique asset tag barcodes? Pipe a CSV directly into Python and generate thousands of SVGs per minute using all CPU cores.

Multiprocessing Pool Ready

// 03 ISO/IEC 18004 SPECIFICATION

Anatomy of a High-Precision Matrix

A Quick Response matrix is not a random grid of dots. It is an intricately engineered geometric system partitioned into strict functional zones:

1. Finder Patterns (Position Detection Eyes)

Three 7×7 module concentric squares located at top-left, top-right, and bottom-left. They follow a strict 1:1:3:1:1 module ratio, allowing camera sensor vision algorithms to detect orientation at any rotational angle.

2. Timing Tracks & Alignment Patterns

Alternating black and white module tracks that link the finder patterns together, establishing the coordinate grid. Alignment patterns correct optical warping on curved surfaces (such as bottles or cans).

3. Format Bits & Interleaved Codewords

Format information encodes the selected Reed-Solomon level and mask pattern (BCH error code protected). The remaining body stores interleaved data and parity blocks.

// QR MATRIX VISUALIZER 21×21 (VERSION 1)

Finder Eyes

Timing Track

Format Bits

// 04 ARCHITECTURAL BENCHMARK

QrGenerator vs. Commercial Online Traps

Do not let marketing agencies print restaurant menus, packaging, or billboards tied to temporary SaaS trial links.

CAPABILITY / SPECIFICATION	QrGenerator (Offline CLI & Studio)	Commercial Online "Free" Tools
Pricing & License Total cost of ownership	$0 Free Forever (MIT Open Source)	$15 to $49 / month recurring subscription
Link Expiration & Hijacking Will the code work in 10 years?	Permanent Direct Encoding (Never expires)	Deactivated after 14-day free trial period
User Privacy & Telemetry What happens to scan metadata?	Zero Telemetry (100% Air-Gapped)	IP addresses, geolocation, device fingerprints logged & sold
Redirect Server Latency Lag between camera scan and page load	0 ms (Opens directly in browser)	300ms – 1,200ms intermediate 302 redirect hop
Vector SVG & High-Res Export Industrial print & packaging capability	Infinite DPI SVG + 1024px PNG Included	Paywalled behind "Pro / Enterprise" tier
Generation Limits & Quotas Batch throughput rate	Unlimited (Tens of thousands per minute)	Capped at 5 to 25 codes before paywall
Air-Gapped / Offline Support Operates without an active internet connection	Full CLI & Standalone Local Execution	Fails completely without internet connectivity

// 05 DEVELOPER PLAYBOOK

Command-Line & Python Recipes

From interactive terminal prompts to multi-core batch processing pipelines. Copy and run directly on any machine.

PYTHON 3.8+ · PILLOW (PIL) · QRCODE

import_qr_code.py

# 1. Clone repository
git clone https://github.com/mirconegri/QrGenerator.git
cd QrGenerator

# 2. Install dependencies
pip install qrcode[pil]

# 3. Run interactive prompt
python import_qr_code.py

# Terminal Output:
# Enter the text or URL to generate the QR code: https://github.com/mirconegri
# QR code successfully generated and saved as 'qrcode.png'.

// 06 KNOWLEDGE BASE

Frequently Asked Questions

Technical specifications on QR barcode architecture, physical printing guidelines, and data capacities.

Commercial "free" generator services don't actually encode your destination link into the code. Instead, they encode an intermediate tracking URL like qr.io/a9x3 on their own server. Once you print the codes, their cloud intercepts the scan and redirects to your destination. After 14 days, they shut down the redirect and demand $35/month. QrGenerator encodes your destination directly into the physical matrix: it physically cannot expire because no middleman server exists.

TEXT IN. PIXEL-PERFECT QR OUT.