Vérificateur de Contraste de QR Code
Vérifiez si les couleurs de votre QR sont lisibles.
Des points clairs sur fond sombre peuvent ne pas se scanner. Privilégiez des points sombres sur fond clair.
Le scan réel dépend aussi de la taille du code, de l'éclairage, de la qualité d'impression et de la caméra — pas seulement du contraste.
Ouvrir le générateur de QR code →Ratio de contraste
21.00:1
Comment ça marche
- 1 Choose your QR foreground (dot) color.
- 2 Choose the background color.
- 3 Read the contrast ratio and verdict.
- 4 Adjust until it's comfortably readable, then generate your code.
Cas d'usage courants
- Validate brand colors before printing a QR.
- Avoid inverted (light-on-dark) codes that fail to scan.
- Compare a few color pairs quickly.
- Sanity-check a designer's QR palette.
Questions fréquentes
Are these static or dynamic QR codes?
Static. The content is encoded directly into the QR code and never changes — no redirect, no tracking and no account. Dynamic QR codes (editable destination, scan analytics) need a redirect service, which this tool does not offer, by design, for privacy.
Is my data uploaded?
No. Everything is generated entirely in your browser — your content is never uploaded, stored or logged.
What contrast ratio is safe?
Aim high. A ratio around 7:1 or more with dark dots on a light background is comfortable. Below ~3:1 is risky, and light-on-dark (inverted) codes often fail regardless of ratio.
Does good contrast guarantee a scan?
No. Contrast is necessary but not sufficient — size, the quiet-zone margin, lighting, print quality and the scanning camera all matter too.
Is it really free?
Yes — free, with no signup, no watermark and no limits.