Yes. NFC Maestro runs entirely in Google Chrome on Android — no app install needed. Open the page, grant NFC permission, and start scanning or writing. Your data never leaves your phone.

URLs, plain text, Wi-Fi credentials, phone numbers, email addresses, SMS shortcuts, GPS locations, contact cards (vCard), Android app launchers, and smart posters. You can also write multiple records to one tag.

NTAG213 (137 bytes) is enough for a URL or short text. NTAG215 (504 bytes) works for Wi-Fi credentials or contact cards. NTAG216 (888 bytes) handles larger payloads like multi-record tags. All three work with this app. Buy NFC tags on Amazon.

No. The Web NFC API is only available in Google Chrome on Android. Apple restricts NFC access to native App Store apps, and desktop browsers don’t support it even with NFC hardware attached.

Locking makes a tag permanently read-only. Nobody can erase, overwrite, or modify the data — ever. This is useful for tags you deploy in public places (restaurant menus, business cards, Wi-Fi access points). It cannot be reversed.

NFC Tools is a native Android app with deeper hardware access (tag type detection, password protection, task automation). NFC Maestro runs entirely in Chrome — no install, no permissions beyond NFC, no data collection. It covers the core use cases: read, write, clone, erase, lock, and batch write. If you need task automation or tag memory analysis, a native app is better. If you want quick, free, no-install tag management, this is it.

Yes. Select Wi-Fi on the Write tab, enter your network name and password, and tap the tag. When someone scans the tag, the app shows the credentials and generates a QR code they can scan to connect. You can also create a scannable QR code for the same network.

No. Everything runs client-side in your browser. Your tag data, Wi-Fi passwords, contacts, and history stay on your device. The app loads one HTML file and two fonts. Nothing is uploaded or tracked beyond basic page analytics.