QR Code Generator
Generate QR codes (versions 1–10, error correction L/M/Q/H) locally using a Rust WASM engine.
QR Code
Loading WASM…
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How it works
Uses a Rust qrcode crate compiled to WebAssembly for encoding. Input is capped to 2048 chars to avoid excessive sizes.
How it works
- WASM engine: Rust generates the QR matrix (1 byte per module) returned to JavaScript.
- Version auto: Chooses the smallest version that fits the data for the chosen ECC level.
- Error correction: Reed–Solomon parity lets the code survive partial damage (L≈7%, M≈15%, Q≈25%, H≈30%).
- Rendering: Bits are scaled with a configurable quiet zone (margin) for reliable scanning.
If the WASM module fails to load, the interface stays disabled to avoid silent fallback.
Privacy & Security
All generation is local in your browser.
Accuracy, Limits & Tips
Version list capped at 10 for UI simplicity; increase if you need larger payloads. Output size capped to 4096×4096.
Examples
- Switch ECC to H for resilience or L for smaller symbols.
Looking for broader guides and best practices? Visit the ToolsAreUs Blog for indexes (like the full tool list) and articles (e.g. secure password generation).