QR コードジェネレーター オンライン
任意のテキストや URL から QR コードを即座に生成します。PNG でダウンロード可能。
上にテキストを入力して QR コードを生成
What Is QR Code Generator?
QR Code Generator is a free online tool that converts any text or URL into a scannable QR code image. Type or paste your content, choose the size and error correction level, and the QR code updates in real time. Download the result as a PNG image for use in print, presentations, or digital media.
How to Use QR Code Generator
- Type or paste your text, URL, or other content into the input field.
- Choose the output size: 128px, 256px, or 512px.
- Select an error correction level (M is recommended for most uses).
- The QR code updates instantly. Click Download to save it as a PNG.
Features
- Real-time QR code generation as you type
- Three output sizes: 128px, 256px, 512px
- Four error correction levels: L, M, Q, H
- Download as PNG image
- Runs entirely in your browser — zero data uploaded
FAQ
What can I encode in a QR code?
You can encode any text, URLs, email addresses, phone numbers, Wi-Fi credentials, or plain text messages. Most QR code scanners will automatically detect the type and take the appropriate action.
What does the error correction level mean?
Error correction allows a QR code to be read even if part of it is damaged or obscured. Level L (7%), M (15%), Q (25%), and H (30%) — higher levels add more redundancy but make the QR code denser.
Is my data sent to a server?
No. QR codes are generated entirely in your browser using the qrcode library. Your data never leaves your device.