qr code generator

No. The QR code is generated entirely in your browser using the qrcode.js library. After the library loads from a CDN, no network request is made during generation. Your text, URL, or Wi-Fi password never leaves your browser tab. It is safe to generate QR codes containing passwords or private URLs.

Error correction allows a QR code to be partially obscured or damaged and still scan correctly. There are four levels: L (7% data recovery), M (15%), Q (25%), and H (30%). Higher error correction produces a denser, larger QR code. Use H if you plan to print the QR code over a logo, on a textured surface, or in a noisy environment. Use L or M for digital displays where the code will always be clean.

Use the format: WIFI:S:your-ssid;T:WPA;P:your-password;; — replace your-ssid with the network name and your-password with the password. Change T:WPA to T:WEP or T:nopass for different security types. Click the Wi-Fi shortcut above the text area to pre-fill the template. Android and iOS will prompt to join the network when scanning.

QR codes can encode plain text, URLs, email addresses (mailto:name@example.com), phone numbers (tel:+15555550100), SMS messages (smsto:+15555550100:your message), calendar events (vCal format), and Wi-Fi credentials (WIFI:S:ssid;T:WPA;P:pass;;). This tool generates a QR code from any text you provide.

For screen use (website, presentation, email), 256px is sufficient. For print, use 512px or 1024px and ensure the printed size is at least 2 cm × 2 cm for reliable scanning. The download button exports the canvas at the exact pixel size selected. Scale up in a vector editor if you need very large print sizes without pixelation.

Yes, completely free with no account required, no ads, and no usage limits. Part of the 49 free developer tools at tools.voiddo.com.