🍋 QR & Barcode
Error Correction Calculator
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About Error Correction Calculator
Compare QR error correction levels — see data capacity impact, recovery rates, and recommended use cases for each level.
How It Works
Browse all four error correction levels (L/M/Q/H) with recovery percentages, capacity impact across QR versions, use case recommendations, and technical details about Reed-Solomon codewords.
Frequently Asked Questions
What is QR error correction?
QR codes use Reed-Solomon error correction to recover data even when parts of the code are damaged or obscured. Higher levels sacrifice capacity for more redundancy.
Can I put a logo on my QR code?
Yes — use Level H (30% recovery). The logo can cover up to ~30% of the code area. Lower levels don't have enough redundancy for logo placement.