URL QR Code

Purpose & User Intent: The URL QR Code Generator converts a user-provided URL into a scannable QR code image for offline sharing and printed materials. Target users include marketers, product teams, developers, event organizers, educators, and field staff who need to disseminate links without typing. When to use: for landing pages, campaign links, signage, packaging, or handouts where a URL must be accessed quickly.

Core Logic & Features: The tool validates the URL, encodes it into a standard QR code with configurable error correction levels (L, M, Q, H), and outputs in PNG or SVG. Required features: URL input, output format, and size; Optional/advanced features: data URL export, fixed version or auto version, and error correction tuning. It maintains consistency in module size and margins suitable for printing and mobile scanning.

Inputs & Outputs: Inputs: url (string, required), format (string, required; PNG or SVG), size (integer, px, optional), version (integer, optional; 1–40), error_correction (string: L/M/Q/H, optional). Outputs: image data (binary for PNG or vector for SVG), width, height, data URL (optional).

Algorithms & Calculations: Uses ISO/IEC 18004 QR encoding rules. If version is auto, selects the smallest version that accommodates the URL with chosen error correction; applies masking to minimize dark/light area imbalance; scales to requested size; for SVG, produces scalable vector representation.

Error & Edge Cases: Invalid or malformed URLs are rejected; extremely long URLs may require higher version or may be truncated to fit size; unsupported formats raise explicit errors; input validation avoids network calls; non-ASCII characters are percent-encoded.

Industry/Region & Localization: QR standards are globally adopted; encoding uses UTF-8 URL encoding; no currency or region-specific adjustments; sizes align with printing and screen media.

Assumptions & Exclusions: Assumes input URL is syntactically valid; does not perform DNS resolution; does not embed branding or styling; no batch processing or analytics; no encryption or sensitive data handling.