Learn what QR codes are, how to generate one for free in seconds, and best practices for printing and sharing them.
Guide étape par étape
Decide What to Encode
QR codes can store URLs, plain text, phone numbers, email addresses, Wi-Fi credentials, and more. The most common use is a website link — paste your URL exactly as you want people to reach it.
Enter Your Content
Type or paste your URL or text into our QR Code Generator. Keep URLs short (use a link shortener if needed) — shorter data means a less dense QR code that scans more reliably.
Generate and Preview
Click Generate. The QR code appears instantly in your browser. Test it immediately — open your phone camera and point it at the screen to confirm it links to the right destination.
Download as PNG
Click Download to save the QR code as a high-resolution PNG file. Use PNG for digital use (websites, presentations) and ensure you download at a size suitable for printing (at least 300×300 px for small prints).
Print and Share
For printed materials (flyers, business cards, posters), ensure the QR code is at least 2×2 cm (¾ inch) square. Leave a white quiet zone border around it. Always test-scan the final printed version before mass printing.
Essayer notre outil gratuit
QR Code Generator
Questions fréquentes
Q: Can I edit a QR code after creating it?
A: No. QR codes are static images encoding fixed data. If your URL changes, generate a new QR code. To make a "living" QR that can be updated, use a dynamic QR code service — these work via a redirect URL.
Q: How much data can a QR code hold?
A: Up to 3,000 alphanumeric characters or 7,089 numeric digits in the densest format. For practical use, keep URLs under 200 characters. Shorter = simpler pattern = faster, more reliable scanning.
Q: Do QR codes expire?
A: Static QR codes (like those made with our generator) never expire — they are just an image. Dynamic QR codes from paid services may expire if you cancel the subscription.