Question 1

How do I add a logo?

Accepted Answer

Click the 'Upload Logo' button in the Logo section of the controls panel. You can upload PNG or SVG files. The logo will be automatically centered and sized appropriately.

Question 2

What logo size is safe?

Accepted Answer

We recommend keeping logos between 15-20% of the QR code area. Our default of 18% works well for most cases. Larger logos may affect scannability, especially with lower error correction levels.

Question 3

Why does my code show 'Risk'?

Accepted Answer

The Risk indicator appears when contrast is too low, the logo is too large, or error correction is insufficient. Try increasing error correction to H, reducing logo size, or using higher contrast colors.

Question 4

Best print settings (DPI, size, quiet zone)?

Accepted Answer

For print, use at least 512px size (1024px for large formats), high error correction (H), and ensure good contrast. Maintain a quiet zone of at least 16px. Test scan your printed code before mass production. Dark modules on white background work best.

Question 5

Do you store my data?

Accepted Answer

No. All QR code generation happens locally in your browser. Nothing is uploaded to our servers. Your content, logos, and settings stay on your device. We only save your last design preferences in browser storage.

Question 6

Can I use HarmanQR commercially?

Accepted Answer

Yes! QR codes you create with HarmanQR can be used for any purpose, including commercial projects. The codes are yours to use however you need.

Question 7

How do gradients affect scanning?

Accepted Answer

Gradients can reduce scannability if the contrast varies too much across the code. For best results, use solid colors with high contrast (at least 4.5:1 ratio). If using gradients, ensure consistent contrast throughout.

Question 8

What is ECC (L/M/Q/H)?

Accepted Answer

ECC stands for Error Correction Capability. It determines how much of the QR code can be damaged or obscured while still being scannable. L=7%, M=15%, Q=25%, H=30%. Use H for codes with logos or custom styling.

Question 9

How to generate Wi-Fi / vCard QR?

Accepted Answer

Use the Template selector in the controls panel. Choose Wi-Fi or vCard, fill in the required fields, and the QR code will be generated automatically with the correct format.

Question 10

How to batch export?

Accepted Answer

Switch to the Batch tab, upload a CSV file with columns for content, filename, and optional logo_url. Map the columns, preview the first 3 entries, then click 'Generate ZIP' to download all QR codes at once.

Frequently Asked Questions

Frequently Asked Questions