QR コード生成
オンラインで無料でQRコードを生成。URL、テキスト用のQRコードを作成。PNGでダウンロード。
Frequently Asked Questions
How do I create a QR code for free?
Type or paste your URL into our QR Code Generator. The QR code appears instantly. Click Download PNG to save it. No sign-up, no watermarks, completely free.
What can QR codes be used for?
QR codes can store URLs, text, WiFi passwords, contact information, and more. Common uses: restaurant menus, event tickets, product packaging, business cards, and marketing materials.
What size should a QR code be for print?
At least 2×2 cm (0.8×0.8 inches) for reliable scanning. For outdoor signs or posters, go larger — 5×5 cm or more. Always test with multiple devices before finalizing.
Do QR codes expire?
No, QR codes never expire. They simply encode text or a URL. However, if the URL they point to stops working, the QR code becomes useless. Use a permanent URL or a redirect service.