Free Online QR Code Generator

You can encode any text up to about 4,000 alphanumeric characters. Common uses include website URLs, email addresses (mailto:), phone numbers (tel:), Wi-Fi credentials (WIFI:T:WPA;S:NetworkName;P:Password;;), plain text messages, and vCard contact information. The QR code standard is flexible — any text string works.

QR codes include redundant data so they can still be scanned if partially damaged. Level L recovers 7% of data, M recovers 15%, Q recovers 25%, and H recovers 30%. Higher correction means a more complex (denser) code but better reliability. Use M for most purposes, Q or H if the code might be printed on curved surfaces or partially covered.

For reliable scanning, a printed QR code should be at least 2 cm x 2 cm (about 0.8 inches). For scanning from a distance, use the 10:1 rule — the code should be 1/10th of the expected scanning distance. A code meant to be scanned from 1 meter away should be at least 10 cm wide. This tool generates a 512px PNG, which prints clearly up to about 4 inches at 150 DPI.

No. QR codes are just encoded text — they don't expire on their own. However, if your QR code contains a URL and that URL stops working, the code will lead to a dead link. Static QR codes (like the ones this tool generates) encode the data directly and work forever. Dynamic QR codes (offered by some paid services) redirect through a URL that can be changed later.

No. The QR code is generated entirely in your browser using JavaScript. The text you enter never leaves your device. You can verify this by disconnecting from the internet — the tool continues to work perfectly.